Q JEE MAIN_2026_

A volume of $x \mathrm{~mL}$ of $5 \mathrm{M} \mathrm{NaHCO}_3$ solution was mixed with 10 mL of $2 \mathrm{MH}_2 \mathrm{CO}_3$ solution...

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200 cc of $x \times 10^{-3} \mathrm{M}$ potassium dichromate is required to oxidise 750 cc of 0.6 M Mohr's salt...

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Q JEE MAIN 2026

Consider the dissociation equilibrium of the following weak acid $\mathrm{HA} \boxtimes \mathrm{H}^{+}(\mathrm{aq})+\mathrm{A}^{-}(\mathrm{aq})$ If the pKa of the acid is 4...

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Q JEE MAIN 2026

0.53 g of an organic compound $(\mathrm{x})$ when heated with excess of nitric acid (concentrated) and then with silver nitrate...

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Q JEE MAIN 2026

X is the number of geometrical isomers exhibited by $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)\left(\mathrm{H}_2 \mathrm{O}\right) \mathrm{BrCl}\right]$. Y is the number of optically inactive isomer(s)...

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Q JEE MAIN 2026

Consider the following redox reaction taking place in acidic medium $$ \mathrm{BH}_4^{-}(a q)+\mathrm{ClO}_3^{-}(a q) \longrightarrow \mathrm{H}_2 \mathrm{BO}_3^{-}(a q)+\mathrm{Cl}^{-}(a q) $$...

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500 mL of 1.2 M KI solution is mixed with 500 mL of $0.2 \mathrm{MKMnO}_4$ solution in basic medium. The...

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Q JEE MAIN 2026

The correct statement among the following is:

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Q JEE MAIN 2026

In period 4 of the periodic table, the elements with highest and lowest atomic radii are respectively.

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Q JEE MAIN 2026

Given below are two statements: Statement 1: The number of pairs, from the following, in which both the ions are...

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Q JEE MAIN 2026

Which of the following point in Figure 2 most accurately represents the nodal surface as shown in Figure 1

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The wave numbers of three spectral lines of H atom are considered. Identify the set of spectral lines belonging to...

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$$ \mathrm{Ph}-\mathrm{CH}=\mathrm{CH}_2 \xrightarrow[\mathrm{HBr}]{(\mathrm{PhCOO})_2} \text { Product } $$ Consider the above reaction A. The reaction proceeds through a more stable...

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Q JEE MAIN 2026

In the given pentapeptide, find out an essential amino acid $(\mathrm{Y})$ and the sequence present in the pentapeptide:

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Consider the following reactions giving major product. Identify the correct reaction.

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Given below are two statements: Statement I: Griss-llosvay test is used for the detection of nitrite ion, which involves the...

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Regarding the hydrides of group 15 elements $\mathrm{EH}_3(\mathrm{E}=\mathrm{N}, \mathrm{P}, \mathrm{As}, \mathrm{Sb})$, select the correct statement from the following: A. The...

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Given below are two statements: Statement I: The number of species among $\mathrm{BF}_4^{-}, \mathrm{SiF}_4, \mathrm{XeF}_4$ and $\mathrm{SF}_4$, that have unequal...

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Given below are the four isomeric compounds (P,Q, S)

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Given below are two statements for the following reaction sequence.

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An organic compound undergoes first order decomposition. The time taken for decomposition to $\left(\frac{1}{8}\right)^{\text {th }}$ and $\left(\frac{1}{10}\right)^{\text {th }}$...

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Q JEE MAIN_2026_

The time period of a simple harmonic oscillator is $T=2 \pi \sqrt{\frac{k}{m}}$. Measured value of mass $(m)$ of the object...

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Q JEE MAIN 2026

Consider a weak base ' B ' of $\mathrm{pK}_{\mathrm{b}}=5.699$ ' $x$ ' mL of 0.02 M HCl and ' y...

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Method used for separation of mixture of products ( B and C ) obtained in the following reaction is

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Consider the following reaction sequence

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At $T(K), 2$ moles of liquid $A$ and 3 moles of liquid $B$ are mixed. The vapour pressure of ideal...

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CORRECT order of stability for the following is $\mathrm{CH}_2=\mathrm{CH}^{-}, \mathrm{CH}_3-\mathrm{CH}_2^{-}, \mathrm{CH} \equiv \mathrm{C}^{-}$

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Q JEE MAIN 2026

$20.0 \mathrm{dm}^3$ of an ideal gas ' X ' at 600 K and 0.5 MPa undergoes isothermal reversible expansion until...

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Grignard reagent $\mathrm{RMgBr}(\mathrm{P})$ reacts with water and forms a gas $(\mathrm{Q})$. One gram of Q occupies $1.4 \mathrm{dm}^3$ at STP....

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Molar conductivity of a weak acid HQ of concentration 0.18 M was found to be $1 / 30$ of the...

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A chromium complex with a formula $\mathrm{CrCl}_3 \cdot 6 \mathrm{H}_2 \mathrm{O}$ has a spin only magnetic moment value of 3.87...

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Q JEE MAIN 2026

The half-life of ${ }^{65} \mathrm{Zn}$ is 245 days. After $x$ days, $75 \%$ of original activity remained. The value...

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0.25 g of an organic compound " A " containing carbon, hydrogen and oxygen was analysed using the combustion method....

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Given below are two statements:

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$A \longrightarrow B$ (first reaction) $\mathrm{C} \longrightarrow \mathrm{D}$ (second reaction) Consider the above two first-order reactions. The rate constant for...

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Q JEE MAIN_2026_

For strong electrolyte $\Lambda_m$ increases slowly with dilution and can be represented by the equation $$ \Lambda_{\mathrm{m}}=\Lambda_{\mathrm{m}}^{\cdot}-A c^{1 / 2}...

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"X" is an oxoanion of the lightest element of group 7 (in the periodic table). The metal is in +6...

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Two positively charged particles and have been accelerated across the same potential difference of 200 keV as shown below.

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At 298 K , the mole percentage of $\mathrm{N}_2(\mathrm{~g})$ in air is $80 \%$. Water is in equilibrium with air...

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The heat of atomisation of methane and ethane are ' $\mathrm{x}{ }^{\prime} \mathrm{kJmol}^{-1}$ and ' $\mathrm{y}{ }^{\prime} \mathrm{kJmol}^{-1}$ respectively. The...

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Q JEE MAIN 2026

From the following, how many compounds contain at least one secondary alcohol?

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The number of isoelectronic species among $\mathrm{Sc}^{3+}, \mathrm{Cr}^{2+}, \mathrm{Mn}^{3+}, \mathrm{Co}^{3+}$ and $\mathrm{Fe}^{3+}$ is ' $n^{\prime}$. If ' $n$ ' moles...

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Given below are two statements:

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The correct order of acidic strength of the major products formed in the given reactions, is : A. $...

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A student performed analysis of aliphatic organic compound ' $X$ ' which on analysis gave $\mathrm{C}=61.01 \%$, $...

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Q JEE MAIN 2026

Given below are two statements: Statement I: Cross aldol condensation between two different aldehydes will always produce four different products....

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Q JEE MAIN_2026_

Structures of four disaccharides are given below. Among the given disaccharides, the non-reducing sugar is :

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Q JEE MAIN 2026

The wavelength of spectral line obtained in the spectrum of $\mathrm{Li}^{2+}$ ion, when the transition takes place between two levels...

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Consider the following reactions $$ \begin{aligned} & \mathrm{Na}_2 \mathrm{~B}_4 \mathrm{O}_7 \xrightarrow{\Delta} 2 \mathrm{X}+\mathrm{Y} \\ & \mathrm{CuSO}_4+\mathrm{Y} \xrightarrow{\text { Non-Luminous flame...

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Q JEE MAIN_2026_

Match List - I with List - II according to shape. Choose the correct answer from the options given below...

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In the Group analysis of cations, $\mathrm{Ba}^{2+} \& \mathrm{Ca}^{2+}$ are precipitated respectively as

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The correct order of $\mathrm{C}, \mathrm{N}, \mathrm{O}$ and F in terms of second ionisation potential is

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Consider the following aqueous solutions. I. 2.2 g Glucose in 125 mL of solution. II. 1.9 g Calcium chloride in...

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$X$ and $Y$ are the number of electrons involved, respectively during the oxidation of $I^{-}$to $I_2$ and $S^{2-}$ to $S$...

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Q JEE MAIN_2026

The wavelength of photon ' $A$ ' is 400 nm . The frequency of photon ' $B$ ' is $...

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In Dumas method for estimation of nitrogen, 0.50 g of an organic compound gave 70 mL of nitrogen collected at...

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The hydrogen spectrum consists of several spectral lines in Lyman series $\left(\mathrm{L}_1, \mathrm{~L}_2, \mathrm{~L}_3 \ldots ; \mathrm{L}_1\right.$ has lowest energy...

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Consider the following statements about manganate and permanganate ions. Identify the correct statements. A. The geometry of both manganate and...

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The plot of $\log _{10} \mathrm{~K} v s \frac{1}{\mathrm{~T}}$ gives a straight line. The intercept and slope respectively are (where...

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Consider two Group IV metal ions $\mathrm{X}^{2+}$ and $\mathrm{Y}^{2+}$. A solution containing $0.01 \mathrm{MX}^{2+}$ and $0.01 \mathrm{MY}^{2+}$ is saturated with...

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The reactions which produce alcohol as the product are: A. $\mathrm{CH}_4+\mathrm{O}_2 \xrightarrow[\Delta]{\mathrm{Mo}_2 \mathrm{O}_3}$ B. $...

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Electricity is passed through an acidic solution of $\mathrm{Cu}^{2+}$ till all the $\mathrm{Cu}^{2+}$ was exhausted, leading to the deposition of...

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Identify the correct statements: The presence of $-\mathrm{NO}_2$ group in benzene ring A. activates the ring towards electrophilic substitutions. B....

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Given below are two statements: Statement I: $\mathrm{K}>\mathrm{Mg}>\mathrm{Al}>\mathrm{B}$ is the correct order in terms of metallic character. Statement II: Atomic...

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Q JEE MAIN_2026

The cyclic cations having the same number of hyperconjugation are Choose the correct answer from the options given below :

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Consider the elements $\mathrm{N}, \mathrm{P}, \mathrm{O}, \mathrm{S}, \mathrm{Cl}$ and F . The number of valence electrons present in the elements...

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Q JEE MAIN 2026

Find out the statements which are not true. A. Resonating structures with more number of covalent bonds and lesser charge...

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Observe the following equilibrium in a 1 L flask. $$ A(g) \rightleftharpoons B(g) $$ At $\mathrm{T}(\mathrm{K})$, the equilibrium concentrations of...

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Given below are two statements : Statement I : The increasing order of boiling point of hydrogen halides is $\mathrm{HCl}

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Arrange the following carbanions in the decreasing order of stability. Choose the correct answer from the options given below:

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For the given reaction; $$ \mathrm{CaCO}_3+2 \mathrm{HCl} \longrightarrow \mathrm{CaCl}_2+\mathrm{H}_2 \mathrm{O}+\mathrm{CO}_2 $$ If $90 \mathrm{gCaCO}_3$ is added to 300 mL of...

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A student has planned to prepare acetanilide from aniline using acetic anhydride. The student has started from 9.3 g of...

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Which of the following reaction is NOT correctly represented ?

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One mole of $\mathrm{Cl}_2(\mathrm{~g})$ was passed into 2 L of cold 2 M KOH solution. After the reaction, the concentrations...

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Total number of alkali insoluble solid sulphonamides obtained by reaction of given amines with Hinsberg's reagent is________. Aniline, N-Methylaniline, Methanamine,...

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The wavelength of light absorbed for the following complexes are in the order

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A student has been given 0.314 g of an organic compound and asked to estimate Sulphur. During the experiment, the...

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The correct increasing order of spin-only magnetic moment values of the complex ions $\left[\mathrm{MnBr}_4\right]^{2-}(\mathrm{A}),\left[\mathrm{Cu}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}(\mathrm{B}),\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}(\mathrm{C})$ and $\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}(\mathrm{D})$ is :

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Pair of species among the following having same bond order as well as paramagnetic character will be-

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Consider the following gaseous equilibrium in a closed container of volume ' $V$ ' at $T(K)$. $$ \mathrm{P}_2(\mathrm{~g})+\mathrm{Q}_2(\mathrm{~g}) \boxtimes \quad...

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Consider the following two reactions A and B. Numerical value of [molar mass of $x+$ molar mass of $y$ ]...

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Two liquids $A$ and $B$ form an ideal solution at temperature $T K$. At $T K$, the vapour pressures of...

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Given below are two statements: Statement I: ' $\mathrm{C}-\mathrm{Cl}^{\prime}$ bond is stronger in $\mathrm{CH}_2=\mathrm{CH}-\mathrm{Cl}$ than $\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{Cl}$ Statement II: The given...

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The number of possible tripeptides formed involving alanine (ala), glycine (gly) and valine (val), where no amino acid has been...

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At $27^{\circ} \mathrm{C}$ in presence of a catalyst, activation energy of a reaction is lowered by $10 \mathrm{~kJ} \mathrm{~mol}^{-1}$. The...

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The unsaturated ether on acidic hydrolysis produces carbonyl compounds as shown below:- $$ \begin{aligned} \mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}- & \mathrm{O}-\mathrm{CH}=\mathrm{CH}_2 \\ & \downarrow...

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A hydroxy compound $(\mathrm{X})$ with molar mass $122 \mathrm{~g} \mathrm{~mol}^{-1}$ is acetylated with acetic anhydride, using a large excess of...

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A student is given one compound among the following compounds that gives positive test with Tollen's reagent. The compound is...

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Q JEE MAIN 2026

Match the LIST-I with LIST-II Choose the correct answer from the options given below:

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'W' g of a non-volatile electrolyte solid solute of molar mass ${ }^{\prime} \mathrm{M}^{\prime} \mathrm{gmol}^{-1}$ when dissolved in 100 mL...

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Choose the INCORRECT statement

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Match the List-I with List-II Choose the correct answer from the options given below:

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Consider three metal chlorides $\mathrm{x}, \mathrm{y}$ and z , where x is water soluble at room temperature, $y$ is sparingly...

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Given below are two statements: Statement I: The number of paramagnetic species among $\left[\mathrm{CoF}_6\right]^{3-},\left[\mathrm{TiF}_6\right]^{3-}, \mathrm{V}_2 \mathrm{O}_5$ and $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$ is 3...

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Consider a mixture ' X ' which is made by dissolving 0.4 mol of $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{SO}_4\right] \mathrm{Br}$ and 0.4 mol...

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The correct stability order of the following diazonium salts is

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Total number of unpaired electrons present in the central metal atoms/ions of $\left[\mathrm{Ni}(\mathrm{CO})_4\right],\left[\mathrm{NiCl}_4\right]^{2-},\left[\mathrm{PtCl}_2\left(\mathrm{NH}_3\right)_2\right],\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ and $\left[\mathrm{Pt}(\mathrm{CN})_4\right]^{2-}$ is $\_\_\_\_$ .

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Among the following, the CORRECT combinations are A. $\mathrm{IF}_3 \rightarrow \mathrm{~T}$-shaped $\left(\mathrm{sp}^3 \mathrm{~d}\right)$ B. $\mathrm{IF}_5 \rightarrow$ Square pyramidal $\left(\mathrm{sp}^3 \mathrm{~d}^2\right)$...

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Q JEE MAIN 2026

Two liquids A and B form an ideal solution. At 320 K, the vapour pressure of the solution, containing 3...

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$$ X_2(g)+Y_2(g) \boxtimes \quad 2 Z(g) $$ $\mathrm{X}_2(\mathrm{~g})$ and $\mathrm{Y}_2(\mathrm{~g})$ are added to a 1 L flask and it is...

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A student has been given a compound " $x$ " of molecular formula- $\mathrm{C}_6 \mathrm{H}_7 \mathrm{~N} \cdot x$ ' is...

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Given below are two statements:

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A solution is prepared by dissolving 0.3 g of a non-volatile non-electrolyte solute ' A ' of molar mass $...

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Given below are statements about some molecules/ions. Identify the CORRECT statements. A. The dipole moment value of $\mathrm{NF}_3$ is higher...

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The work functions of two metals $\left(M_A\right.$ and $\left.M_B\right)$ are in the $1: 2$ ratio. When these metals are exposed...

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Arrange the following alkenes in decreasing order of stability. Choose the correct answer from the options given below:

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$\mathrm{A} \rightarrow \mathrm{D}$ is an endothermic reaction occurring in three steps (elementary). (i) $\mathrm{A} \rightarrow \mathrm{B} \Delta \mathrm{H}_i=+\mathrm{ve}$ (ii) $...

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The oxidation state of chromium in the final product formed in the reaction between KI and acidified $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$...

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Given below are two statements: Statement I: Hybridisation, shape and spin only magnetic moment of $\mathrm{K}_3\left[\mathrm{Co}\left(\mathrm{CO}_3\right)_3\right]$ is $\mathrm{sp}^3 \mathrm{~d}^2$, octahedral...

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A mixed ether ${ }^{(P)}$, when heated with excess of hot concentrated hydrogen iodide produces two different alkyl iodides which...

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In Carius method 0.2425 g of an organic compound gave 0.5253 g silver chloride. The percentage of chlorine in the...

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Identify the INCORRECT statements from the following: A. Notation ${ }_{12}^{24} \mathrm{Mg}$ represents 24 protons and 12 neutrons. B. Wavelength...

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Which statements are NOT TRUE about $\mathrm{XeO}_2 \mathrm{~F}_2$ ? A. It has a see-saw shape. B. Xe has 5 electron...

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Which of the following statements are TRUE about Haloform reaction?:

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Observe the following reactions at $\mathrm{T}(\mathrm{K})$. I. A → products. II. $5 \mathrm{Br}^{-}(\mathrm{aq})+\mathrm{BrO}_3^{-}(\mathrm{aq})+6 \mathrm{H}^{+}(\mathrm{aq}) \rightarrow 3 \mathrm{Br}_2(\mathrm{aq})+3 \mathrm{H}_2 \mathrm{O}(\mathrm{l})$ Both...

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For the series LCR circuit connected with $220 \mathrm{~V}, 50 \mathrm{~Hz}$ a.c source as shown in the figure, the power...

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Given below are two statements: Statement I: The second ionisation enthalpy of Na is larger than the corresponding ionisation enthalpy...

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The crystal field splitting energy of $\left[\mathrm{Co}(\text { oxalate })_3\right]^{3-}$ complex is ' $n$ ' times that of the $...

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Consider all the structural isomers with molecular formula $\mathrm{C}_5 \mathrm{H}_{11} \mathrm{Br}$ are separately treated with $\mathrm{KOH}(\mathrm{aq})$ to give respective substitution...

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lodoform test can differentiate between A. Methanol and Ethanol B. $\mathrm{CH}_3 \mathrm{COOH}$ and $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{COOH}$ C. Cyclohexene and cyclohexanone...

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x mg of pure HCl was used to make an aqueous solution. 25.0 mL of $0.1 \mathrm{MBa}(\mathrm{OH})_2$ solution is used...

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For the following gas phase equilibrium reaction at constant temperature, $$ \mathrm{NH}_3(\mathrm{~g}) \rightleftharpoons 1 / 2 \mathrm{~N}_2(\mathrm{~g})+3 / 2 \mathrm{H}_2(\mathrm{~g})...

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Given below are two statements: Statement I: $\left(\mathrm{CH}_3\right)_3 \stackrel{\oplus}{\mathrm{C}}$ is more stable than $\stackrel{\oplus}{\mathrm{C}} \mathrm{H}_3$ as nine hyperconjugation interactions are...

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For the thermal decomposition of reaction AB(g), the following is constructed. The half life of the reaction is ' $x$...

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Consider the general reaction given below at 400 K $$ x \mathrm{~A}(\mathrm{~g}) \rightleftharpoons y \mathrm{~B}(\mathrm{~g}) . $$ The values of...

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Elements X and Y belong to Group 15. The difference between the electronegativity values of ' X ' and phosphorus...

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The correct statements from the following are : A. Ionic radii of trivalent cations of group 13 elements decreases down...

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Identify the CORRECT set of details from the following : A. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ : Inner orbital complex ; d $...

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Compound ‘P’ undergoes the following sequence of reactions : ‘P’ is :

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Given below are two statements : Statement I: Sublimation is used for the separation and purification of compounds with low...

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Both human DNA and RNA are chiral molecules. The chirality in DNA and RNA arises due to the presence of

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Match List - I with List - II. Choose the correct answer from the options given below :

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Consider the above electrochemical cell where a metal electrode ( $M$ ) is undergoing redox reaction by forming $...

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Identify the molecule $(\mathrm{X})$ with maximum number of lone pairs of electrons (obtained using Lewis dot structure) among $...

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From the given following (A to D) cyclic structures, those which will not react with Tollen's reagent are :

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It is noticed that $\mathrm{Pb}^{2+}$ is more stable than $\mathrm{Pb}^{4+}$ but $\mathrm{Sn}^{2+}$ is less stable than $\mathrm{Sn}^{4+}$. Observe the following...

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The statements that are incorrect about the nickel(II) complex of dimethylglyoxime are : A. It is red in colour. B....

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Given above is the concentration vs time plot for a dissociation reaction : $\mathrm{A} \rightarrow \mathrm{nB}$ Based on the data...

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Consider the following compounds Arrange these compounds in the increasing order of reactivity with nitrating mixture.

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Given, (A) $\mathrm{n}=5, \mathrm{~m}_{\ell}=-1$ (B) $\mathrm{n}=3,1=2, \mathrm{~m}_{\ell}=-1, \mathrm{~m}_{\mathrm{s}}=+\frac{1}{2}$ The maximum number of electron(s) in an atom that can have the...

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But-2-yne and hydrogen (one mole each) are separately treated with (i) $\mathrm{Pd} / \mathrm{C}$ and (ii) $\mathrm{Na} /$ liq. $\mathrm{NH}_3$...

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MX is a sparingly soluble salt that follows the given solubility equilibrium at 298 K . $...

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Identify the metal ions among $\mathrm{Co}^{2+}, \mathrm{Ni}^{2+}, \mathrm{Fe}^{2+}, \mathrm{V}^{3+}$ and $\mathrm{Ti}^{2+}$ having a spin-only magnetic moment value more than 3.0...

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Given below are two statements : Statement I: $\left[\mathrm{CoBr}_4\right]^{2-}$ ion will absorb light of lower energy than $\left[\mathrm{CoCl}_4\right]^{2-}$ ion. Statement...

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A cup of water at $5^{\circ} \mathrm{C}$ (system) is placed in a microwave oven and the oven is turned on...

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A substance ${ }^{\prime} \mathrm{X}$ ' ( 1.5 g ) dissolved in 150 g of a solvent ${ }^{\prime} \mathrm{Y}$...

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The osmotic pressure of a living cell is 12 atm at 300 K . The strength of sodium chloride solution...

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Consider the following sequence of reactions. Assuming that the reaction proceeds to completion, then 137 mg of 4 -nitrotoluene will...

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' $x$ ' is the product which is obtained from propanenitrile and stannous chloride in the presence of hydrochloric acid...

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The first and second ionization constants of $\mathrm{H}_2 \mathrm{X}$ are $2.5 \times 10^{-8}$ and $1.0 \times 10^{-13}$ respectively. The concentration...

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In the given electrochemical cell, $\mathrm{Ag}(\mathrm{s})|\mathrm{AgCl}(\mathrm{s})| \mathrm{FeCl}_2(\mathrm{aq}), \mathrm{FeCl}_3(\mathrm{aq}) \mid \mathrm{Pt}(\mathrm{s})$ at 298 K , the cell potential $\left(\mathrm{E}_{\text {cell }}\right)$...

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The correct sequence of reagents for the above conversion of X to Y is :

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On heating a mixture of common salt and $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ in equal amount along with concentrated $\mathrm{H}_2 \mathrm{SO}_4$ in...

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The correct trend in the first ionization enthalpies of the elements in the $3^{\text {rd }}$ period of periodic table...

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Given below are two statements: Statement I: The correct order in terms of bond dissociation enthalpy is $\mathrm{Cl}_2>\mathrm{Br}_2>\mathrm{F}_2>\mathrm{I}_2$. Statement II:...

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Which one of the following graphs accurately represents the plot of partial pressure of $\mathrm{CS}_2$ vs its mole fraction in...

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Which of the following statements regarding the energy of the stationary state is true in the following one - electron...

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For a closed circuit Daniell cell, which of the following plots is the accurate one at a given temperature?

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Given below are some of the statements about Mn and $\mathrm{Mn}_2 \mathrm{O}_7$. Identify the correct statements. A. Mn forms the...

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Given below are four compounds: (a) n-propyl choride (b) iso-propyl chloride (c) sec-butyl chloride (d) neo-pentyl chloride Percentage of carbon...

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The mass of benzanilide obtained from the benzoylation reaction of 5.8 g of aniline, if yield of product is $...

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If the enthalpy of sublimation of Li is $155 \mathrm{~kJ} \mathrm{~mol}^{-1}$, enthalpy of dissociation of $\mathrm{F}_2$ is $150 \mathrm{~kJ} \mathrm{~mol}^{-1}$,...

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The correct increasing order of $\mathrm{C}-\mathrm{H}(\mathrm{A}), \mathrm{C}-\mathrm{O}(\mathrm{B}), \mathrm{C}=\mathrm{O}(\mathrm{C})$ and $C \equiv N(D)$ bonds in terms of covalent bond length is:

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Among the following oxides of 3 d elements, the number of mixed oxides are $\_\_\_\_$ $...

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Given below are two statements: Statement I: Crystal Field Stabilization Energy $(\mathrm{CFSE})$ of $\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$ is greater than that of...

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Consider $A \xrightarrow{k_1} B$ and $C \xrightarrow{k_2} D$ are two reactions. If the rate constant $\left(k_1\right)$ of the $...

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Consider the following electrochemical cellin $$ \mathrm{Pt}\left|\mathrm{O}_2(\mathrm{~g})(\mathrm{lbar})\right| \mathrm{HCl}(\mathrm{aq}) \| \mathrm{M}^{2+}(\mathrm{aq}, 1.0 \mathrm{M}) \mid \mathrm{M}(\mathrm{~s}) $$ The pH above which, oxygen...

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The correct order of the rate of the reaction for the following reaction with respect to nucleophiles is :$...

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The energy of first (lowest) Balmer line of H atom is $x \mathrm{~J}$. The energy (in J ) of second...

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The correct statements are: A. Activation energy for enzyme catalysed hydrolysis of sucrose is lower than that of acid catalysed...

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Given below are two statements: Statement I: The correct order in terms of atomic/ionic radii is $\mathrm{Al}>\mathrm{Mg}>\mathrm{Mg}^{2+}>\mathrm{Al}^{3+}$. Statement II: The...

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Consider the following reaction : The product Y formed is :

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Dissociation of a gas $\mathrm{A}_2$ takes place according to the following chemical reaction. At equilibrium, the total pressure is 1...

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The correct order of reactivity of the following benzyl halides towards reaction with KCN is :

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Sodium fusion extract of an organic compound $(\mathrm{Y})$ with $\mathrm{CHCl}_3$ and chlorine water gives violet color to the $\mathrm{CHCl}_3$ layer....

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The temperature at which the rate constants of the given below two gaseous reactions become equal is _____K. (Nearest integer)...

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$$ \mathrm{A}+2 \mathrm{~B} \longrightarrow \mathrm{AB}_2 $$ 36.0 g of 'A' (Molar mass: $60 \mathrm{~g} \mathrm{~mol}^{-1}$ ) and 56.0 g of...

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Consider the following electrochemical cell at 298 K $\mathrm{Pt}\left|\mathrm{HSnO}_2^{-}(\mathrm{aq})\right| \mathrm{Sn}(\mathrm{OH})_6{ }^{2-}(\mathrm{aq})\left|\mathrm{OH}^{-}(\mathrm{aq})\right| \mathrm{Bi}_2 \mathrm{O}_3(\mathrm{~s}) \mid \mathrm{Bi}(\mathrm{s})$. If the reaction quotient at...

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Match List-I with List-II. Choose the correct answer from the options given below:

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The IUPAC name of the following compound is :

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The cycloalkene ( $X$ ) on bromination consumes one mole of bromine per mole of ( $X$ ) and gives...

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When 1 g of compound $(\mathrm{X})$ is subjected to Kjeldahl's method for estimation of nitrogen, $...

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Given below are two statements: Statement I: The Henry's law constant $\mathrm{K}_{\mathrm{H}}$ is constant with respect to variations in solution's...

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Identify the correct statements : A. Hydrated salts can be used as primary standard. B. Primary standard should not undergo...

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As compared with chlorocyclohexane, which of the following statements correctly apply to chlorobenzene? A. The magnitude of negative charge is...

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Among $\mathrm{H}_2 \mathrm{~S}, \mathrm{H}_2 \mathrm{O}, \mathrm{NF}_3, \mathrm{NH}_3$ and $\mathrm{CHCl}_3$, identify the molecule $(\mathrm{X})$ with lowest dipole moment value. The number...

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Two p -block elements X and Y form fluorides of the type $\mathrm{EF}_3$. The fluoride compound $\mathrm{XF}_3$ is a Lewis...

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Which of the following mixture gives a buffer solution with $\mathrm{pH}=9.25$ ? Given: $\mathrm{pK}_{\mathrm{b}}\left(\mathrm{NH}_4 \mathrm{OH}\right)=4.75$

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The correct order of the rate of reaction of the following reactants with nucleophile by $\mathrm{S}_{\mathrm{N}} 1$ mechanism is :...

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' A ' is a neutral organic compound $\left(\mathrm{M} . \mathrm{F}: \mathrm{C}_8 \mathrm{H}_9 \mathrm{ON}\right)$. On treatment with aqueous $...

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Correct statements regarding Arrhenius equation among the following are. A. Factor $e^{-E a / R T}$ corresponds to fraction of...

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Given below are two statements: Statement I: Sucrose is dextrorotatory. However, sucrose upon hydrolysis gives a solution having mixture of...

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Given below are two statements : Statement I: Elements ' $X$ ' and ' $Y$ ' are the most and...

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Given below are two statements: Statement I: The halogen that makes longest bond with hydrogen in HX, has the smallest...

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$\left[\mathrm{Ni}\left(\mathrm{PPh}_3\right)_2 \mathrm{Cl}_2\right]$ is a paramagnetic complex. Identify the INCORRECT statements about this complex. A. The complex exhibits geometrical isomerism. B....

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Match the LIST-I with LIST-II Choose the correct answer from the options given below:

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$\mathrm{A} \rightarrow$ product (First order reaction). Three sets of experiment were performed for a reaction under similar experimental conditions: Run...

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The compound $\mathrm{A}, \mathrm{C}_8 \mathrm{H}_8 \mathrm{O}_2$ reacts with acetophenone to form a single product via cross-Aldol condensation. The compound A...

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Given below are two statements: Statement I: Benzene is nitrated to give nitrobenzene, which on further treatment with $...

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At $\mathrm{T}(\mathrm{K}), 100 \mathrm{~g}$ of $98 \% \mathrm{H}_2 \mathrm{SO}_4(\mathrm{w} / \mathrm{w})$ aqueous solution is mixed with 100 g of $...

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Consider the following reduction processes : $$ \begin{aligned} & \mathrm{Al}^{3+}+3 \mathrm{e}^{-} \longrightarrow \mathrm{Al}(\mathrm{~s}), \mathrm{E}^0=-1.66 \mathrm{~V} \\ & \mathrm{Fe}^{3+}+\mathrm{e}^{-} \longrightarrow \mathrm{Fe}^{2+},...

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Given below are two statements Statement I: $\mathrm{C}\mathrm{Po}>\mathrm{O}$ is the correct order in terms of the magnitude of electron gain...

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Choose the correct answer from the options given below:

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The dibromo compound $[P]$ (molecular formula: $\mathrm{C}_9 \mathrm{H}_{10} \mathrm{Br}_2$ ) when heated with excess sodamide followed by treatment with dilute...

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The correct order of reactivity of $\mathrm{CH}_3 \mathrm{Br}$ in methanol with the following nucleophiles is $\mathrm{F}^{-}, \mathrm{I}^{-}, \mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{-}$and...

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Consider the following data: $\Delta_f \mathrm{H}^{!} \quad($ Methane, g$)=-\mathrm{XkJ} \mathrm{mol}^{-1}$ Enthalpy of sublimation of graphite $=\mathrm{Y} \mathrm{kJ} \mathrm{mol}^{-1}$ Dissociation enthalpy...

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By usual analysis, 1.00 g of compound $(\mathrm{X})$ gave 1.79 g of magnesium pyrophosphate. The percentage of phosphorus in compound...

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Aqueous HCl reacts with $\mathrm{MnO}_2(\mathrm{~s})$ to form $\mathrm{MnCl}_2(\mathrm{aq}), \mathrm{Cl}_2(\mathrm{~g})$ and $\mathrm{H}_2 \mathrm{O}(l)$. What is the weight (in g ) of...

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Consider the above sequence of reactions. The number of bromine atom(s) in the final product (P) will be:

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Match List - I with List - II.Choose the correct answer from the options given below:

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A first row transition metal ( $M$ ) does not liberate $H_2$ gas from dilute HCl .1 mol of aqueous...

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Match List - I with List - II. Choose the correct answer from the options given below :

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Consider a solution of $\mathrm{CO}_2(\mathrm{~g})$ dissolved in water in a closed container. Which one of the following plots correctly represents...

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consider the following spectral lines for atomic hydrogen : A. First line of Paschen series B. Second line of Balmer...

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Given below are two statements : Statement I: The first ionization enthalpy of Cr is lower than that of Mn...

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In the reaction, $2 \mathrm{Al}(\mathrm{s})+6 \mathrm{HCl}(\mathrm{aq}) \rightarrow 2 \mathrm{Al}^{3+}(\mathrm{aq})+6 \mathrm{Cl}^{-}(\mathrm{aq})+3 \mathrm{H}_2(\mathrm{~g})$

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A 'p'-block element $(\mathrm{E})$ and hydrogen form a binary cation $\left(\mathrm{EH}_{\mathrm{x}}\right)^{+}$, while $\mathrm{EH}_3$ on treatment with $\mathrm{K}_2 \mathrm{HgI}_4$ in alkaline...

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3, 3-Dimethyl-2-butanol cannot be prepared by : Choose the correct answer from the options given below :

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The energy required by electrons, present in the first Bohr orbit of hydrogen atom to be excited to second Bohr...

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Given below are two statements: br> Statement I: Phenol on treatment with $\mathrm{CHCl}_3$ / aq. KOH under refluxing condition, followed...

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The formal changes on the atoms marked as (1) to (4) in the Lewis representation of $\mathrm{HnO}_3$ molecule respectively are

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Consider the transition metal ions $\mathrm{Mn}^{3+}, \mathrm{Cr}^{3+}, \mathrm{Fe}^{3+}$ and $\mathrm{Co}^{3+}$ and all form low spin octahedral complexes. The correct decreasing...

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Consider the following reactions : $$ \begin{aligned} & \mathrm{NaCl}+\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7+\mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{~A}+\mathrm{KHSO}_4+\mathrm{NaHSO}_4+\mathrm{H}_2 \mathrm{O} \\ & \mathrm{~A}+\mathrm{NaOH} \rightarrow \mathrm{~B}+\mathrm{NaCl}+\mathrm{H}_2...

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Consider the following equation:

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Use the following data : One mole each of $\mathrm{A}_2(\mathrm{~g})$ and $\mathrm{B}_2(\mathrm{~g})$ are taken in a 1 L closed flask...

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The pH and conductance of a weak acid $(\mathrm{HX})$ was found to be 5 and $4 \times 10^{-5} \mathrm{~S}$, respectively....

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Pre-exponential factors of two different reactions of same order are identical. Let activation energy of first reaction exceeds the activation...

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Given below are two statements : Statement I: When an electric discharge is passed through gaseous hydrogen, the hydrogen molecules...

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For the reaction, $\mathrm{N}_2 \mathrm{O}_4 \rightleftharpoons 2 \mathrm{NO}_2$, graph is plotted as shown below. Identify correct statements. A. Standard free...

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Which of the following graphs between pressure 'p' versus volume 'V' represents the maximum work done?

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Identify the correct statements. A. Arginine and Tryptophan are essential amino acids. B. Histidine does not contain heterocyclic ring in...

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Identify correct statements from the following : A. Propanal and propanone are functional isomers. B. Ethoxyethane and methoxypropane are metamers....

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Given below are two statements: Statement I: Among $\left.\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+},\left[\mathrm{Ni}(\mathrm{en})_3\right)\right]^{2+},\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+}$ and $\left[\mathrm{Mn}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$, $\left[\mathrm{Mn}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$ has the maximum number of unpaired...

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Given below are two statements : Statement I : The number of species among $\mathrm{SF}_4, \mathrm{NH}_4^{+},\left[\mathrm{NiCl}_4\right]^{2-}, \mathrm{XeF}_4,\left[\mathrm{PiCl}_4\right]^{2-}, \mathrm{SeF}_4$ and $\left.[\mathrm{NiCN})_4\right]^{2-}$,...

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$\mathrm{MnO}_4{ }^{2-}$, in acidic medium, disproportionates to :

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From the following, the least stable structure is :

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An organic compound " P " of molecular formula $\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_3$ gives positive lodoform test but negative Tollen's test....

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An organic compound $(\mathrm{P})$ on treatment with aqueous ammonia under hot condition forms compound $(\mathrm{Q})$ which on heating with $\mathrm{Br}_2$...

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Elements $P$ and $Q$ form two types of non-volatile, non-ionizable compounds $P Q$ and $P Q_2$. When 1 g of...

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In Carius method, 0.75 g of an organic compound gave 1.2 g of barium sulphate, find percentage of sulphur (molar...

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14.0 g of calcium metal is allowed to react with excess HCl at 1.0 atm pressure and 273 K ....

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80 mL of a hydrocarbon on mixing with 264 mL of oxygen in a closed U-tube undergoes complete combustion. The...

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Given below are two statements : Statement I: The number of pairs among $\left[\mathrm{SiO}_2, \mathrm{CO}_2\right],\left[\mathrm{SnO}, \mathrm{SnO} \mathrm{O}_2\right],\left[\mathrm{PbO}, \mathrm{PbO}_2\right]$ and $...

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A hydrocarbon ' P ' $\left(\mathrm{C}_4 \mathrm{H}_8\right)$ on reaction with HCl gives an optically active compound ' Q ' $...

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Identify A in the following reaction.

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Which of the following represents the correct trend for the mentioned property? A. $\mathrm{F}>\mathrm{P}>\mathrm{S}>\mathrm{B}$ - First lonization Energy B. $\mathrm{Cl}>\mathrm{F}>\mathrm{S}>\mathrm{P}$...

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Consider the following reactions. $\mathrm{PbCl}_2+\mathrm{K}_2 \mathrm{CrO}_4 \rightarrow \mathrm{~A}+2 \mathrm{KCl}$ (Hot solution) $$ \begin{aligned} & \mathrm{A}+\mathrm{NaOH} \rightleftharpoons \mathrm{~B}+\mathrm{Na}_2 \mathrm{CrO}_4 \\ &...

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The organic compound that gives following qualitative analysis is

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The correct sequence of amino acids present in the tripeptide given below is : The given tripeptide contains.

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The major product of the following reaction is

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Which of the following combination of statements is true regarding the interpretation of the atomic orbitals?

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For the following reaction, the mass of water produced from 445 g of $\mathrm{C}_{57} \mathrm{H}_{110} \mathrm{O}_6$ is: $$ 2 \mathrm{C}_{57}...

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The degenerate orbitals of $\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$ are

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The major product of the following reaction is:

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The increasing basicity order of the following compounds is:

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For the reaction, $2 \mathrm{~A}+\mathrm{B} \rightarrow$ products, when the concentration of A and B both were doubled, the rate of...

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The aerosol is a kind of colloid in which

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The major product formed in the following reaction is:

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The complex that has highest crystal field splitting energy (Δ), is

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Homoleptic octahedral complexes of a metal ion ' $\mathrm{M}^{3+1}$ with three monodentate ligands $\mathrm{L}_1, \mathrm{~L}_2$ and $\mathrm{L}_3$ absorb wavelengths in...

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The correct statement regarding the given Ellingham diagram is

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At $100^{\circ} \mathrm{C}$, copper $(\mathrm{Cu})$ has FCC unit cell structure with cell edge length of $\mathrm{x} \AA$. What is the...

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The temporary hardness of water is due to

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The correct IUPAC name of the following compound is

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Which of the following statements is not true about sucrose?

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The correct statement among the following is

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The major products of the following reaction are

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Enthalpy of sublimation of iodine is $24 \mathrm{cal} \mathrm{g}^{-1}$ at $200^{\circ} \mathrm{C}$. If specific heat of $\mathrm{I}_2(\mathrm{~s})$ and $\mathrm{I}_2(\mathrm{vap})$ are...

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The correct set of species responsible for the photochemical smog is :

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Peptization is a

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Which of the following is a thermosetting polymer?

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The idea of froth floatation method came from a person X and this method is related to the process Y...

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An ideal gas is allowed to expand from 1 L to 10 L against a constant external pressure of 1...

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What is the molar solubility of $\mathrm{Al}(\mathrm{OH})_3$ in 0.2 M NaOH solution? Given that, solubility product of $\mathrm{Al}(\mathrm{OH})_3=2.4 \times 10^{-2}$

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Q JEE MAIN 2019

The group number, number of valence electrons, and valency of an element with atomic number 15, respectively, are

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The mole fraction of a solvent in aqueous solution of a solute is 0.8 . The molality (in $\mathrm{mol} \mathrm{kg}-1$...

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The basic structural unit of feldspar, zeolites, mica, and asbestos is

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Q JEE MAIN_2019_

Match the refining methods (Column I) with metals (Column II). Column I Column II (Refining methods) (Metals) (I) Liquation (a)...

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An organic compound ' A ' is oxidized with $\mathrm{Na}_2 \mathrm{O}_2$ followed by boiling with $\mathrm{HNO}_3$. The resultant solution is...

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The major product of the following reaction is

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The mass of gas adsorbed, $x$, per unit mass of absorbate, $m$, was measured at various pressures, p. A graph...

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Q JEE MAIN 2020

The number of chiral carbons present in the molecule given below is ______.

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Three complexes, $\quad\left[\mathrm{CaCl}\left(\mathrm{NH}_3\right)_5\right]^{2+}(\mathrm{I})$, $\left[\mathrm{Ca}\left(\mathrm{NH}_3\right)_5 \mathrm{H}_2 \mathrm{O}\right]^{3+}(\mathrm{II})$ and $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ (III) absorb light in the visible region. The correct order of the...

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The Gibbs energy change (in J ) for the given reaction at $[\mathrm{Cu} 2+]=[\mathrm{Sn} 2+]=1 \mathrm{M}$ and 298 K is:...

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At 300 K and 1 atmospheric pressure, 10 mL of a hydrocarbon required 55 mL of $\mathrm{O}_2$ for complete combustion,...

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The oxidation states of iron atoms in compounds (A), (B) and (C), respectively, are $x, y$ and $z$. The sum...

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Q JEE MAIN_2019_

The synonym for water gas when used in the production of methanol is :

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The internal energy change (in J ) when 90 g of water undergoes complete evaporation at $100^{\circ} \mathrm{C}$ is $\_\_\_\_$...

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The metal mainly used in devising photoelectric cells is

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The increasing order of the following compounds towards HCN addition is

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A gas undergoes physical adsorption on a surface and follows the given Freundlich adsorption isotherm equation $\frac{\mathrm{x}}{\mathrm{m}}=\mathrm{kp}^{0.5}$ Adsorption of the...

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In general the property (magnitudes only) that show an opposite trend in comparison to other properties across a period is

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At room temperature, a dilute solution of urea is prepared by dissolving 0.60 g of urea in 360 g of...

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The major aromatic product C in the following reaction sequence will be

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Which of the following is used for the preparation of colloids?

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The regions of the atmosphere, where clouds form and where we live, respectively, are :

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An example of a disproportionation reaction is

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The statement that is not true about ozone is

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While titrating dilute HCl solution with aqueous NaOH, which of the following will not be required?

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Complete removal of both the axial ligands (along the z-axis) from an octahedral complex leads to which of the following...

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The IUPAC name for the following compound is

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Which of the following compunds will show retention in configuration on nucleophic substitution by OH– ion?

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The electrons are more likely to be found

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Consider that a $\mathrm{d}^6$ metal ion $\left(\mathrm{M}^{2+}\right)$ forms a complex with aqua ligands, and the spin only magnetic moment of...

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For octahedral Mn(II) and tetrahedral Ni(II) complexes, consider the following statements: (I) both the complexes can be high spin. (II)...

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Which one of the following graphs is not correct for ideal gas? d = Density, P = Pressure, T =...

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Consider the following rections: (i) Glucose $+\mathrm{ROH} \xrightarrow{\text { dry } \mathrm{HCl}}$ Acetal $\xrightarrow[\left(\mathrm{CH}_3 \mathrm{cO}\right)_2 \mathrm{O}]{\text { xeq. of }}$...

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An open beaker of water in equilibrium with water vapour is in a sealed container. When a few grams of...

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The major product in the following reaction is

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For the following Assertion and Reason, the correct option is Assertion (A): When Cu (II) and sulphide ions are mixed,...

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If $\mathrm{AB}_4$ molecule is a polar molecule, a possible geometry of $A B_4$ is

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The figure that is not a direct manifestation of the quantum nature of atoms is

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On heating compound (A) gives a gas (B) which is a constituent of air. This gas when treated with H2...

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In Carius method of estimation of halogen, 0.172 g of an organic compound showed presence of 0.08 g of bromine....

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The ratio of the mass percentages of ‘C & H’ and ‘C & O’ of a saturated acyclic organic compound...

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For the disproportionation reaction $2 \mathrm{Cu}^{+}(\mathrm{ag}) \rightleftharpoons \mathrm{Cu}(\mathrm{s})+\mathrm{Cu}^{2+}(\mathrm{ag})$ at $298 \mathrm{~K} . \mathrm{In} \mathrm{K}$ (where K is the equilibrium constant)...

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The heat of combustion of ethanol into carbon dioxide and water is -327 kcal at constant pressure. The heat evolved...

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The work function of sodium metal is $4.41 \times 10^{-19} \mathrm{~J}$. If photons of wavelength 300 nm are incident on...

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The oxidation states of transition metal atoms in $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7, \mathrm{KMnO}_4$ and $\mathrm{K}_2 \mathrm{FeO}_4$, respectively, are $\mathrm{x}, \mathrm{y}$ and...

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The correct observation in the following reactions is :

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The major product of the following reaction is:

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An organic compound ' A ' $\left(\mathrm{C}_9 \mathrm{H}_{10} \mathrm{O}\right)$ when treated with conc. HI undergoes cleavage to yield compounds '...

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The shape / structure of $\left[\mathrm{XeF}_5\right]^{-}$and $\mathrm{XeO}_3 \mathrm{~F}_2$, respectively, are

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During the change of $\mathrm{O}_2$ to $\mathrm{O}_2^{-}$, the incoming electron goes to the orbital:

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The increasing order of the $\mathrm{pK}_{\mathrm{b}}$ of the following compound is :

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Two compounds $A$ and $B$ with same molecular formula $\left(\mathrm{C}_3 \mathrm{H}_6 \mathrm{O}\right)$ undergo Grignard's reaction with methylmagnesium bromide to give...

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Amongst the following statements regarding adsorption, those that are valid are (a) $\Delta \mathrm{H}$ becomes less negative as adsorption proceeds...

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The increasing order of the reactivity of the following compounds towards electrophilic aromatic substitution reactions is :

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The metal that gives hydrogen gas upon treatment with both acid as well as base is

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The molecular geometry of SF6 is octahedral. What is the geometry of SF4 (including lone pair(s) of electrons, if any)?

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Glucose and Galactose are having identical configuration in all the positions except position

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The results given in the below table were obtained during kinetic studies of the following reaction $2 A+B \rightarrow C+D$...

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The correct order of catenation is:

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An element has a face-centred cubic (fcc) structure with a cell edge of a. The distance between the centres of...

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The one that is not expected to show isomerism is

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The complex ion that will lose its crystal field stabilization energy upon oxidation of its metal to +3 state is:

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Match the type of interaction in column A with the distance dependence of their interaction energy in column B

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Which of the following statements is not true about RNA

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50 mL of 0.5 M oxalic acid is needed to neutralize 25 mL of sodium hydroxide solution. The amount of...

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The size of a raw mango shrinks to a much smaller size when kept in a concentrated salt solution. Which...

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In the following skew conformation of ethane, H′ – C – C – H″ dihedral angle is

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Freezing point of a 4% aqueous solution of X is equal to freezing point of 12% aqueous solution of Y....

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Simplified absorption spectra of three complexes ((i), (ii) and (iii)) of $\mathrm{M}^{n^{+}}$ion are provided below; their $\lambda_{\max }$ values are...

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The major product(s) obtained in the following reaction is/are

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The element with Z = 120 (not yet discovered) will be an/a

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$$ \text { Which one of the following is likely to give a precipitate with } \mathrm{AgNO}_3 \text { solution?...

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Iodine reacts with concentrated HNO3 to yield Y along with other products. The oxidation state of iodine in Y, is

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The correct sequence of thermal stability of the following carbonates is :

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If you spill a chemical toilet cleaning liquid on your hand, your first aid would be

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The coordination numbers of Co and Al in $\left[\mathrm{Co}(\mathrm{Cl})(\mathrm{en})_2\right] \mathrm{Cl}$ and $\mathrm{K}_3\left[\mathrm{Al}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]$, respectively, are (en $=$ ethane -1 ,...

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The major product of the following reaction is

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The number of subshells associated with n = 4 and m = –2 quantum numbers is

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Consider the following reactions :

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Among the following compounds most basic amino acid is

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Arrange the following labelled hydrogens in decreasing order of acidity

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For a diatomic ideal gas in a closed system, which of the following plots does not correctly describe the relation...

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Which of the given statements is INCORRECT about glycogen?

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Three elements X, Y and Z are in the 3rd period of the periodic table. The oxides of X, Y...

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Cast iron is used for the manufacture of

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The correct statement is

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The major product of the following reaction

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But-2-ene on reaction with alkaline $\mathrm{KMnO}_4$ at elevated temperature followed by acidification will give :

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The major product obtained from $\mathrm{E}_2$ - elimination of 3-bromo-2-fluoropentane is

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In the following reactions, products A and B are

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Two elements A and B have similar chemical properties. They don’t form solid hydrogencarbonates, but react with nitrogen to form...

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The major product of the following addition reaction is

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Thermal decomposition of a Mn compound $(\mathrm{X})$ at 513 K results in compound $\mathrm{Y}, \mathrm{MnO}_2$ and a gaseous product. $\mathrm{MnO}_2$...

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Consider the reaction sequence given below: Which of the following statements is true?

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Among the following four aromatic compounds, which one will have the lowest melting point?

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Among the following, the energy of 2s orbital is lowest in:

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What will be the major product when m -cresol is reacted with propargyl bromide ( $\mathrm{HC} \equiv \mathrm{C}-\mathrm{CH}_2 \mathrm{Br}$ )...

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Heating of 2-chloro-1-phenylbutane with EtOK/ EtOH gives $X$ as the major product. Reaction of $X$ with $\mathrm{Hg}(\mathrm{OAc})_2 / \mathrm{H}_2 \mathrm{O}$...

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Q JEE-MAIN 2019

In the Hall-Heroult process, aluminium is formed at the cathode. The cathode is made out of

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The temporary hardness of a water sample is due to compound X. Boiling this sample converts X to compound Y....

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The molar solubility of $\mathrm{Cd}(\mathrm{OH})_2$ is $1.84 \times 10^{-5} \mathrm{M}$ in water. The expected solubility of $\mathrm{Cd}(\mathrm{OH})_2$ in a buffer...

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Q JEE MAIN 2019

The IUPAC name for the following compound is

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In comparison to boron, berylium has

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The ratio of number of atoms present in a simple cubic, body centered cubic and face centered cubic structure are,...

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A solution is prepared by dissolving 0.6 g of urea (molar mass $=60 \mathrm{~g} \mathrm{~mol}^{-1}$ ) and 1.8 g of...

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The correct name of the following polymer is

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$\mathrm{NO}_2$ required for a reaction is produced by the decomposition of $\mathrm{N}_2 \mathrm{O}_5$ in $\mathrm{CCl}_4$ as per the equation, $...

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The INCORRECT match in the following is

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The correct sequence of amino acids present in the tripeptide given below is : The given tripeptide contains.

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Which of the following combination of statements is true regarding the interpretation of the atomic orbitals? (a) An electron in...

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Which of the following compounds is not aromatic?

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The primary pollutant that leads to photochemical smog is

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For the following reaction, the mass of water produced from 445 g of $\mathrm{C}_{57} \mathrm{H}_{110} \mathrm{O}_6$ is: $...

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The major product of the following reaction is:

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The increasing basicity order of the following compounds is:

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For the reaction, $2 A+B \rightarrow$ products, when the concentration of $A$ and $B$ both were doubled, the rate of...

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Good reducing nature of $\mathrm{H}_3 \mathrm{PO}_2$ is attributed to the presence of:

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The major product formed in the following reaction is:

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The complex that has highest crystal field splitting energy ( $\Delta$ ), is

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$$ \text { The correct order of the oxidation states of nitrogen in NO, N2O, NO2, and N2O3 is }...

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Q JEE MAIN 2019

The element having greatest difference between its first and second ionization energies, is

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For a reaction, $\mathrm{N}_2(\mathrm{~g})+3 \mathrm{H}_2(\mathrm{~g}) \rightarrow 2 \mathrm{NH}_3(\mathrm{~g})$; Identify dihydrogen $\left(\mathrm{H}_2\right)$ as a limiting reagent in the following reaction mixtures.

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Major products of the following reaction are :

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The species that can have a trans-isomer is : (en = ethane-1, 2-diamine, ox = oxalate)

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Q JEE MAIN 2019

Excessive release of $\mathrm{CO}_2$ into the atmosphere results in

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The major product of the following reaction is :

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Among the following, the INCORRECT statement about colloids is

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Increasing rate of $\mathrm{S}_{\mathrm{N}} 1$ reaction in the following compounds is:

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In which one of the following equilibria, $\mathrm{K}_{\mathrm{P}} \neq \mathrm{K}_{\mathrm{C}}$ ?

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Among the following, the molecule expected to be stabilized by anion formation is $\mathrm{C}_2, \mathrm{O}_2, \mathrm{NO}, \mathrm{F}_2$

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25 g of an unknown hydrocarbon upon burning produces 88 g of $\mathrm{CO}_2$ and 9 g of $\mathrm{H}_2 \mathrm{O}$. This...

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A process will be spontaneous at all temperatures if

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Ethylamine $\left(\mathrm{C}_2 \mathrm{H}_5 \mathrm{NH}_2\right)$ can be obtained from Nethylphthalimide on treatment with:

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The major product of the following reaction

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An ‘Assertion’ and a ‘Reason’ are given below. Choose the correct answer from the following options : Assertion (A) :...

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Q JEE MAIN 2019

The major product of the following reaction is

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Q JEE MAIN_2019_

The alloy used in the construction of aircrafts is :

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Q JEE MAIN_2019_

The isoelectronic set of ions is :

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Q JEE MAIN 2019

Consider the van der Waals constants, a and b, for the following gases. Which gas is expected to have the...

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In the Hall-Heroult process, aluminium is formed at the cathode. The cathode is made out of

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Consider the hydrated ions of $\mathrm{Ti}^{2+}, \mathrm{V}^{2+}, \mathrm{Ti}^{3+}$, and $\mathrm{Sc}^{3+}$. The correct order of their spin-only magnetic moments is i.

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Decomposition of X exhibits a rate constant of 0.05 g/year. How many years are required for the decomposition of 5...

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The major product of the following reaction is :

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The compound used in the treatment of lead poisoning is :

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The correct statement regarding the given Ellingham diagram is

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The standard electrode potential $E^{\circ}$ and its temperature coefficient $\left(\frac{d E^{\circ}}{d T}\right)$ for a cell are $2 V$ and $...

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A bacterial infection in an internal wound grows as $\mathrm{N}^{\prime}(\mathrm{t})=\mathrm{N}_0 \exp (\mathrm{t})$, where the time t is in hours. A...

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Q JEE-MAIN 2019

Two solids dissociate as follows $\begin{aligned} & \mathrm{A}(\mathrm{s}) \rightleftharpoons \mathrm{B}(\mathrm{g})+\mathrm{C}(\mathrm{g}) ; \mathrm{K}_{\mathrm{P}_1}=\mathrm{x} \mathrm{atm}^2 \\ & \mathrm{D}(\mathrm{s}) \rightleftharpoons \mathrm{C}(\mathrm{g})+\mathrm{E}(\mathrm{g}) ; \mathrm{K}_{\mathrm{P}_2}=\mathrm{yatm}^2\end{aligned}$...

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Q JEE MAIN 2019

At $100^{\circ} \mathrm{C}$, copper $(\mathrm{Cu})$ has FCC unit cell structure with cell edge length of $\mathrm{x} \AA$. What is the...

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Q JEE MAIN 2019

The decreasing order of electrical conductivity of the following aqueous solutions is: 0.1 M Formic acid (A), 0.1 M Acetic...

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Q JEE MAIN_2019_

Amylopectin is composed of

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Consider the following table i \begin{tabular}{lll} Gas & $\mathrm{a} /\left(\mathrm{k} \mathrm{Pa} \mathrm{dm}^6 \mathrm{~mol}^{-1}\right)$ & $\mathrm{b} /\left(\mathrm{dm}^3 \mathrm{~mol}^{-1}\right)$ \\ A &...

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Q JEE MAIN 2019

The C–C bond length is maximum in :

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Consider the statements S1 and S2: S1: Conductivity always increases with decrease in the concentration of electrolyte. S2 : Molar...

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Q JEE MAIN 2019

The osmotic pressure of a dilute solution of an ionic compound XY in water is four times that of a...

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Q JEE MAIN_2019_

The major product of the following reaction is :

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Q JEE MAIN 2019

The pair that has similar atomic radii is :

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Q JEE MAIN 2019

A solution containing 62 g ethylene glycol in 250 g water is cooled to $-10^{\circ} \mathrm{C}$. If $\mathrm{K}_{\mathrm{f}}$ for water...

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Q JEE MAIN_2019_

The principle of column chromatography is:

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The INCORRECT statement is :

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The given plots represent the variation of the concentration of a reactant R with time for two different reactions (i)...

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Q JEE-MAIN 2019

Poly- $\beta$-hydroxybutyrate-co- $\beta$-hydroxyvalerate (PHBV) is a copolymer of $\_\_\_\_$ .

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Which of the following is a condensation polymer?

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Q JEE MAIN_2019_

The graph between $|\psi|^2$ and r(radial distance) is shown below. This represents i.

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Q JEE MAIN 2019

The increasing order of reactivity of the following compounds towards aromatic electrophilic substitution reaction is

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Q JEE-MAIN 2019

In the following reaction

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Q JEE MAIN_2019_

The oxoacid of sulphur that does not contain bond between sulphur atoms is :

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The major product of the following reaction is

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Consider the following statements (a) The pH of a mixture containing 400 mL of 0.1 $\mathrm{M} \mathrm{H}_2 \mathrm{SO}_4$ and 400...

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Q JEE MAIN 2019

Among the following, the set of parameters that represents path functions, is (A) q + w (B) q (C) w...

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Q JEE MAIN 2019

In which of the following processes, the bond order has increased and paramagnetic character has changed to diamagnetic?

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Q JEE MAIN 2019

The pH of rain water, is approximately

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The temporary hardness of water is due to

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When the first electron gain enthalpy $\left(\Delta_{\mathrm{eg}} \mathrm{H}\right)$ of oxygen is $-141 \mathrm{~kJ} / \mathrm{mol}$, its second electron gain enthalpy...

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Q JEE MAIN 2019

The major product of the following reaction

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Q JEE MAIN 2019

A solution containing 62 g ethylene glycol in 250 g water is cooled to $-10^{\circ} \mathrm{C}$. If $\mathrm{K}_{\mathrm{f}}$ for water...

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Q JEE MAIN 2019

When the first electron gain enthalpy $\left(\Delta_{e 0} \mathrm{H}\right)$ of oxygen is $-141 \mathrm{~kJ} / \mathrm{mol}$, its second electron gain...

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Q JEE MAIN 2019

In which of the following processes, the bond order has increased and paramagnetic character has changed to diamagnetic?

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Q JEE MAIN 2019

For coagulation of arsenious sulphide sol, which one of the following salt solution will be most effective?

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Q JEE-MAIN 2019

The hardness of a water sample (in terms of equivalents of $\mathrm{CaCO}_3$ ) containing $10^{-3} \mathrm{M} \mathrm{CaSO}_4$ is (molar mass...

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Q JEE MAIN 2019

If the standard electrode potential for a cell is 2 V at 300 K , the equilibrium constant $(\mathrm{K})$ for...

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A metal on combustion in excess air forms $X$. $X$ upon hydrolysis with water yields $\mathrm{H}_2 \mathrm{O}_2$ and $\mathrm{O}_2$ along...

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The metal d-orbitals that are directly facing the ligands in $\mathrm{K}_3\left[\mathrm{Co}(\mathrm{CN})_6\right]$ are

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The transition element that has lowest enthalpy of atomisation, is

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The entropy change associated with the conversion of 1 kg of ice at 273 K to water vapours at 383...

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Given Gas H2 CH4 CO2 SO2 Critical 33 190 304 630 Temperature/K On the basis of data given above, predict...

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A soft drink was bottled with a partial pressure of $\mathrm{CO}_2$ of 3 bar over the liquid at room temperature....

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Q JEE MAIN 2019

The metal that forms nitride by reacting directly with $\mathrm{N}_2$ of air, is

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For any given series of spectral lines of atomic hydrogen, let $\Delta \bar{v}=\bar{v}_{\max }-\bar{v}_{\min }$ be the difference in maximum...

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Which of the following conditions in drinking water causes methemoglobinemia?

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An oxidation-reduction reaction in which 3 electrons are transferred has a $\Delta \mathrm{G}^0$ of $17.37 \mathrm{~kJ} \mathrm{~mol}^{-1}$ at $25^{\circ} \mathrm{C}$....

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Q JEE-MAIN 2019

Water samples with BOD values of 4 ppm and 18 ppm, respectively, are

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The major product of the following reaction is $\mathrm{CH}_3 \mathrm{CH}=\mathrm{CHCO}_2 \mathrm{CH}_3 \xrightarrow{\mathrm{LiAlH}_4}$

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Q JEE MAIN 2019

Consider the following reversible chemical reactions $...

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Liquid ‘M’ and liquid ‘N’ form an ideal solution. The vapour pressures of pure liquids ‘M’ and ‘N’ are 450...

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Q JEE MAIN 2019

The major product obtained in the following reaction is

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The tests performed on compound X and their inferences are : Test Inference (a) 2,4-DNP test Coloured precipitate (b) Iodoform...

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Q JEE MAIN 2020

The number of chiral carbon(s) present in peptide, Ile-Arg-Pro, is

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Q JEE MAIN 2019

For coagulation of arsenious sulphide sol, which one of the following salt solution will be most effective?

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The correct match between Item I and Item II is :

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The one that will show optical activity is (en = ethane-1,2-diamine)

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Q JEE MAIN 2019

Magnesium powder burns in air to give

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The correct structure of histidine in a strongly acidic solution (pH = 2) is

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The total number of coordination sites in ethylenediaminetetraacetate (EDTA ${ }^{4-}$ ) is

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Q JEE MAIN 2019

The element that shows greater ability to form $p \pi-p \pi$ multiple bonds, is

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The number of water molecule(s) not coordinated to copper ion directly in $\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}$, is

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The minimum number of moles of $\mathrm{O}_2$ required for complete combustion of 1 mole of propane and 2 moles of...

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8 g of NaOH is dissolved in 18 g of $\mathrm{H}_2 \mathrm{O}$. Mole fraction of NaOH in solution and molality...

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The difference between radii of $3^{\text {rd }}$ and $4^{\text {th }}$ orbits of $\mathrm{Li}^{2+}$ is $\Delta \mathrm{R}_1$. The difference...

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Q JEE MAIN 2019

If the standard electrode potential for a cell is 2 V at 300 K , the equilibrium constant $(\mathrm{K})$ for...

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A diatomic molecule $X_2$ has a body-centred cubic (bcc) structure with a cell edge of 300 pm . The density...

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Q JEE MAIN 2019

The combination of plots which does not represent isothermal expansion of an ideal gas is

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Consider the following reaction : $\mathrm{N}_2 \mathrm{O}_4(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}_2(\mathrm{~g}) ; \Delta \mathrm{H}^0=+58 \mathrm{~kJ}$ For each of the following cases...

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Q JEE MAIN 2019

The transition element that has lowest enthalpy of atomisation, is

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The standard Gibbs energy for the given cell reaction in kJ mol–1 at 298 K is $\mathrm{Zn}(\mathrm{s})+\mathrm{Cu}^{2+}(\mathrm{aq}) \longrightarrow \mathrm{Zn}^{2+}(\mathrm{aq})+\mathrm{Cu}(\mathrm{s})$, $...

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Q JEE MAIN 2019

The upper stratosphere consisting of the ozone layer protects us from the sun’s radiation that falls in the wavelength region...

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Q JEE MAIN 2019

The pair that does NOT require calcination is

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Q JEE MAIN 2019

The entropy change associated with the conversion of 1 kg of ice at 273 K to water vapours at 383...

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Q JEE MAIN 2019

The two monomers for the synthesis of nylon 6, 6 are

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Q JEE MAIN 2019

The major product of the following reaction is $\mathrm{CH}_3 \mathrm{C} \equiv \mathrm{CH} \xrightarrow[\text { (ii)DI }]{\text { (i)DCl (1equiv.) }}$

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Q JEE MAIN 2019

In the given circuit the internal resistance of the 18 V cells is negligible. If $\mathrm{R}_1=400 \Omega, \mathrm{R}_3=100 \Omega$ and...

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In the following reaction sequence the major products A and B are:

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The element that does NOT show catenation is

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Q JEE MAIN 2019

$\mathrm{C}_{60}$ , an allotrope of carbon contains

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The correct order of atomic radii is

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A flask contains a mixture of compounds A and B. Both compounds decompose by first-order kinetics. The half-lives for A...

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The volume strength of $1 \mathrm{M} \mathrm{H}_2 \mathrm{O}_2$ is (Molar mass of $\mathrm{H}_2 \mathrm{O}_2=34 \mathrm{~g} \mathrm{~mol}^{-1}$ )

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Q JEE MAIN 2019

The metal that forms nitride by reacting directly with $\mathrm{N}_2$ of air, is

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If the de Broglie wavelength of the electron in $\mathrm{n}^{\text {th }}$ Bohr orbit in a hydrogenic atom is equal...

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Identify the correct molecular picture showing what happens at the critical micellar concentration (CMC) of an aqueous solution of a...

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Q JEE MAIN 2019

Which of the following conditions in drinking water causes methemoglobinemia?

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Q JEE MAIN 2020

The increasing order of basicity of the following compounds is

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Q JEE MAIN 2019

Consider the following reversible chemical reactions

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The potential energy curve for the $\mathrm{H}_2$ molecule as a function of internuclear distance is

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Which of the following derivatives of alcohols is unstable in an aqueous base?

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The increasing order of the acidity of the $\alpha$ hydrogen of the following compounds is

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Chlorine on reaction with hot and concentrated sodium hydroxide gives

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The structure of PCl5 in the solid state is

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The correct match between Item I and Item II is : Item I Item II (A) Benzaldehyde (P) Mobile phase...

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Molecules of benzoic acid $\left(\mathrm{C}_6 \mathrm{H}_5 \mathrm{COOH}\right)$ dimerise in benzene. ' w ' g of the acid dissolved in 30...

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Q JEE MAIN 2020

The most appropriate reagent for conversion of $\mathrm{C}_2 \mathrm{H}_5 \mathrm{CN}$ into $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{NH}_2$ is

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Q JEE MAIN 2019

The products formed in the reaction of cumene with $\mathrm{O}_2$ followed by treatment with dil. HCl are :

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The major product of the following reaction is

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The correct electronic configuration and spinonly magnetic moment (BM) of $\mathrm{Gd}^{3+}(\mathrm{Z}=64)$, respectively, are

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A spherical balloon of radius 3 cm containing helium gas has a pressure of $48 \times 10^{-3}$ bar. At the...

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The major product in the following conversion is

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Which of the following is not an essential amino acid?

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An Ellingham diagram provides information about

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If a person is suffering from the deficiency of nor-adrenaline, what kind of drug can be suggested?

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The number of Cl = O bonds in perchloric acid is

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The condition that indicates a polluted environment is

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The equation that represents the water-gas shift reaction is

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The values of the crystal field stabilization energies for a high spin $d^6$ metal ion in octahedral and tetrahedral fields,...

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The elevation of boiling point of 0.10 m aqueous $\mathrm{CrCl}_3 . \mathrm{xNH}_3$ solution is two times that of 0.05 m...

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Q JEE MAIN 2020

In the sixth period, the orbitals that are filled are

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For a reaction, consider the plot of $\ln \mathrm{k}$ versus $1 / \mathrm{T}$ given in the figure. If the rate...

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Q JEE MAIN 2019

The aldehydes which will not form Grignard product with one equivalent Grignard reagent are

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The major product of the following reaction is

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$\wedge_{\mathrm{m}}^{\circ}$ for $\mathrm{NaCl}, \mathrm{HCl}$ and NaA are $126.4,425.9$ and $100.5 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$, respectively. If the conductivity of 0.001 M...

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Q JEE MAIN 2019

The major product of the following reaction is

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The magnetic moment of an octahedral homoleptic Mn(II) complex is 5.9 BM. The suitable ligand for this complex is

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The major product of the following reaction is

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Among the following, the false statement is

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In an estimation of bromine by Carius method, 1.6 g of an organic compound gave 1.88 g of AgBr. The...

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The set that contains atomic numbers of only transition elements, is

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An open vessel at 27°C is heated until two fifth of the air (assumed as an ideal gas) in it...

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The rate of a reaction decreased by 3.555 times when the temperature was changed from $40^{\circ} \mathrm{C}$ to $30^{\circ} \mathrm{C}$....

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Consider the Assertion and Reason given below. Assertion (A) : Ethene polymerized in the presence of Ziegler Natta Catalyst at...

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The atomic number of Unnilunium is _______.

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If the solubility product of $\mathrm{AB}_2$ is $3.20 \times 10^{-11} \mathrm{M}^3$, then the solubility of $A B_2$ in pure water...

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For Freundlich adsorption isotherm, a plot of log (x/m) (y-axis) and $\log p$ (x-axis) gives a straight line. The intercept...

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The correct statement with respect to dinitrogen is

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A solution of phenol in chloroform when treated with aqueous NaOH gives compound P as a major product. The mass...

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The major product obtained from the following reaction is

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Dihydrogen of high purity (> 99.95%) is obtained through

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For a $\mathrm{d}^4$ metal ion in an octahedral field, the correct electronic configuration is

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The increasing order of the boiling points of the major products A, B and C of the following reactions will...

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The element that can be refined by distillation is

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The presence of soluble fluoride ion upto 1 ppm concentration in drinking water, is

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Q JEE MAIN 2020

Match the following :

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Among the sulphates of alkaline earth metals, the solubilities of $\mathrm{BeSO}_4$ and $\mathrm{MgSO}_4$ in water, respectively, are

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The lanthanoid that does NOT show +4 oxidation state is

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A set of solutions is prepared using 180 g of water as a solvent and 10 g of different nonvolatile...

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For the given cell; $$ \mathrm{Cu}(\mathrm{~s})\left|\mathrm{Cu}^{2+}\left(\mathrm{C}_1 \mathrm{M}\right) \| \mathrm{Cu}^{2+}\left(\mathrm{C}_2 \mathrm{M}\right)\right| \mathrm{Cu}(\mathrm{~s}) $$ change in Gibbs energy ( $\Delta \mathrm{G}$ )...

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Which of the following compounds shows geometrical isomerism?

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For a reaction, $$ 4 \mathrm{M}(\mathrm{~s})+\mathrm{nO}_2(\mathrm{~g}) \rightarrow 2 \mathrm{M}_2 \mathrm{O}_{\mathrm{n}}(\mathrm{~s}) $$ the free energy change is plotted as a function...

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Q JEE MAIN 2020

The major product of the following reaction is

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The correct match between Item-I (starting material) and Item-II (reagent) for the preparation of benzaldehyde is

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The major products of the following reaction are

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A crystal is made up of metal ions $M_1$ and $M_2$ and oxide ions. Oxide ions form a ccp lattice...

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The average molar mass of chlorine is 35.5 g $\mathrm{mol}^{-1}$. The ratio of ${ }^{35} \mathrm{Cl}$ to ${ }^{37} \mathrm{Cl}$...

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The species that has a spin-only magnetic moment of 5.9 BM , is ( $T_{\mathrm{d}}=$ tetrahedral)

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Q JEE MAIN 2020

Mischmetal is an alloy consisting mainly of

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Reaction of an inorganic sulphite X with dilute $\mathrm{H}_2 \mathrm{SO}_4$ generates compound Y . Reaction of Y with NaOH gives...

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Q JEE MAIN 2020

The IUPAC name of the following compound is

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The correct match between Item - I and Item – II is

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Match the following compounds (Column-I) with their uses (Column-II)

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Which one of the following statements is not true?

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$$ \text { The reaction of } \mathrm{NO} \text { with } \mathrm{N}_2 \mathrm{O}_4 \text { at } 250 \mathrm{~K}...

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Q JEE MAIN 2019

An example of solid sol is.

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Heat treatment of muscular pain involves radiation of wavelength of about 900 nm . Which spectral line of Hatom is...

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Q JEE MAIN 2020

The mass percentage of nitrogen in histamine is _____.

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108 g of silver (molar mass $108 \mathrm{~g} \mathrm{~mol}^{-1}$ ) is deposited at cathode from $\mathrm{AgNO}_3(\mathrm{aq})$ solution by a certain...

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Q JEE MAIN 2019

A 10 mg effervescent tablet containing sodium bicarbonate and oxalic acid releases 0.25 ml of $\mathrm{CO}_2$ at $\mathrm{T}=$ 298.15 K...

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The hardness of a water sample containing $10^{-3} \mathrm{M} \mathrm{MgSO}_4$ expressed as $\mathrm{CaCO}_3$ equivalents (in ppm) is $\_\_\_\_$ . (molar...

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Q JEE MAIN 2020

The molarity of $\mathrm{HNO}_3$ in a sample which has density $1.4 \mathrm{~g} / \mathrm{mL}$ and mass percentage of $63 \%$...

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Q JEE MAIN 2019

Peroxyacetyl nitrate (PAN), an eye irritant is produced by

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How much amount of NaCl should be added to 600 g of water ( $\rho=1.00 \mathrm{~g} / \mathrm{mL}$ ) to...

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Q JEE MAIN 2019

Which compound(s) out of following is/are not aromatic?

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Q JEE MAIN 2020

The correct order of heat of combustion for following alkadienes is

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Q JEE MAIN 2020

For following reactions $...

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Q JEE MAIN 2019

The amphoteric hydroxide is

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B has a smaller first ionization enthalpy than Be. Consider the following statements. (I) It is easier to remove 2p...

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Q JEE MAIN 2019

NaH is an example of

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‘X’ melts at low temperature and is a bad conductor of electricity in both liquid and solid state. X is

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The compound that cannot act both as oxidising and reducing agent is

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The polymer obtained from the following reactions is

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Among the following compounds, which one is found in RNA?

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Which of these will produce the highest yield in Friedel Crafts reaction?

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The acidic, basic and amphoteric oxides, respectively, are

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The element that usually does NOT show variable oxidation states is

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According to the following diagram, A reduces $\mathrm{BO}_2$ when the temperature is

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Q JEE MAIN 2019

The correct statements among (a) to (d) regarding $\mathrm{H}_2$ as a fuel are (a) It produces less pollutants than petrol....

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Q JEE MAIN 2020

The increasing order of basicity for the following intermediates is (from weak to strong)

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Two blocks of the same metal having same mass and at temperature $T_1$ and $T_2$, respectively, are brought in contact...

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If the magnetic moment of a dioxygen species is 1.73 B.M, it may be

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A chemist has 4 samples of artificial sweetener A, B, C and D. To identify these samples, he performed certain...

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Q JEE MAIN 2019

Match the metals (column I) with the coordination compound(s)/enzyme(s) (column II)

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The major product (Y) in the following reaction is

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An organic compound is estimated through Dumas method and was found to evolve 6 moles of $\mathrm{CO}_2 4$ moles of...

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Q JEE MAIN 2020

Identify (A) in the following reaction sequence.

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For the chemical reaction $\mathrm{X} \rightleftharpoons \mathrm{Y}$, the standard reaction Gibbs energy depends on temperature T (in K ) as...

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Q JEE MAIN 2020

The de Broglie wavelength of an electron in the $4^{\text {th }}$ Bohr orbit

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Consider the reaction $$ \mathrm{N}_2(\mathrm{~g})+3 \mathrm{H}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NH}_3(\mathrm{~g}) $$ The equilibrium constant of the above reaction is $\mathrm{K}_{\mathrm{P}}$. If...

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For the cell $\mathrm{Zn}(\mathrm{s})\left|\mathrm{Zn}^{2+}(\mathrm{ag}) \| \mathrm{M}^{x+}(\mathrm{ag})\right| \mathrm{M}(\mathrm{s})$, different half cells and their standard electrode potentials are given below If $...

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Q JEE MAIN 2019

The correct order of the atomic radii of C, Cs, Al, and S is

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The correct match between items I and II is

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The electronic configurations of bivalent europium and trivalent cerium are (atomic number : Xe = 54, Ce = 58, Eu...

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A solid having density of $9 \times 10^3 \mathrm{~kg} \mathrm{~m}^{-3}$ forms face centred cubic crystals of edge length $...

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Complex $X$ of composition $\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6 \mathrm{Cl}_n$ has a spin only magnetic moment of 3.83 BM . It reacts with...

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Q JEE MAIN 2020

The major product Z obtained in the following reaction scheme is

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The major product of the following reaction is:

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If enthalpy of atomisation for $\mathrm{Br}_{2(I)}$ is $\times \mathrm{kJ} / \mathrm{mol}$ and bond enthalpy for $\mathrm{Br}_2$ is $...

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Q JEE MAIN 2020

Ferrous sulphate heptahydrate is used to fortify foods with iron. The amount (in grams) of the salt required to achieve...

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$[\mathrm{Pd}(\mathrm{F})(\mathrm{Cl})(\mathrm{Br})(\mathrm{I})]^{2-}$ has n number of geometrical isomers. Then, the spin-only magnetic moment and crystal field stabilisation energy [CFSE] of $...

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Q JEE MAIN 2019

The major product of the following reaction is

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What would be the electrode potential for the given half cell reaction at $\mathrm{pH}=5$ ? $\_\_\_\_$ . $...

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If a reaction follows the Arrhenius equation, the plot $\operatorname{lnk} v s \frac{1}{(R T)}$ gives straight line with a gradient...

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Q JEE MAIN 2019

The chloride that CANNOT get hydrolysed is:

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The number of chiral centres in penicillin is _____.

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The major product of the following reaction is:

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The volume (in mL ) of $0.125 \mathrm{M} \mathrm{AgNO}_3$ required to quantitatively precipitate chloride ions in 0.3 g of $...

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The major product of the following reaction is

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The magnitude of work done by a gas that undergoes reversible expansion along the path ABC shown in the figure...

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The locus of the centres of the circles, which touch the circle, $x^2+y^2=1$ externally, also touch the $y$-axis and lie...

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The correct match between item (I) and item (II) is:

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The number of bonds between sulphur and oxygen atoms in $\mathrm{S}_2 \mathrm{O}_8^{2-}$ and the number of bonds between sulphur and...

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The major products A and B in the following reactions are

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The freezing point of a diluted milk sample is found to be $-0.2^{\circ} \mathrm{C}$, while it should have been $...

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A flask contains a mixture of isohexane and 3-methylpentane. One of the liquids boils at 63°C while the other boils...

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The concentration of dissolved oxygen (DO) in cold water can go upto:

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The major product of the following reaction is

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Considering that $\Delta_0>\mathrm{P}$, the magnetic moment (in BM) of $\left[\mathrm{Ru}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$ would be $\_\_\_\_$ .

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Match the ores (column A) with the metals (column B): \begin{tabular}{ll} \multicolumn{1}{c}{\begin{tabular}{c} (Column A) \\ Ores \end{tabular}} & \multicolumn{1}{c}{\begin{tabular}{l} (Column...

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The number of chiral carbons present in sucrose is _____.

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Among the gases (a) - (e), the gases that cause greenhouse effect are

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For a dimerization reaction $$ 2 \mathrm{~A}(\mathrm{~g}) \rightarrow \mathrm{A}_2(\mathrm{~g}) $$ at $298 \mathrm{~K}, \Delta \mathrm{U}^{\circ}=-20 \mathrm{~kJ} \mathrm{~mol}^{-1}, \Delta \mathrm{~S}^{\circ}=-30$ $...

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The third ionization enthalphy is minimum for

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In chromatography, which of the following statements is INCORRECT for $\mathrm{R}_{\mathrm{f}}$ ?

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The volume, in mL , of $0.02 \mathrm{M} \mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ solution required to react with 0.288 g of ferrous...

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Q JEE MAIN 2020

Which of the following statement is not true for glucose?

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The correct statements among (a) to (d) are : (a) Saline hydrides produce H2 gas when reacted with H2O. (b)...

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For a reaction $X+Y=2 Z, 1.0 \mathrm{~mol}$ of $X, 1.5 \mathrm{~mol}$ of $Y$ and 0.5 mol of $Z$ were taken...

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Q JEE MAIN 2020

The most suitable reagent for the given conversion is

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The one that is NOT suitable for the removal of permanent hardness of water is

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Q JEE MAIN 2019

Points I, II and III in the following plot respectively correspond to ( $\mathrm{V}_{\text {mp }}$ : most probable velocity)

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Lattice enthalpy and enthalpy of solution of NaCl are $788 \mathrm{~kJ} \mathrm{~mol}^{-1}$ and $4 \mathrm{~kJ} \mathrm{~mol}^{-1}$, respectively. The hydration enthalpy...

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The strength of an aqueous NaOH solution is most accurately determined by titrating

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The minimum amount of O2(g) consumed per gram of reactant is for the reaction: (Given atomic mass : Fe =...

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Q JEE-MAIN 2020

The final major product of the following reaction is

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The rate of a certain biochemical reaction at physiological temperature (T) occurs 106 times faster with enzyme than without. The...

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Boron and silicon of very high purity can be obtained through

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Arrange the following compounds in increasing order of C – OH bond length methanol, phenol, p-ethoxyphenol

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Which of the following is NOT a correct method of the preparation of benzylamine from cyanobenzene?

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The major product formed in the following reaction is $\mathrm{CH}_3 \mathrm{CH}=\mathrm{CHCH}\left(\mathrm{CH}_3\right)_2 \xrightarrow{\mathrm{HBr}}$

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Q JEE MAIN 2020

When gypsum is heated to 393 K, it forms

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The noble gas that does NOT occur in the atmosphere is :

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The rate constant (k) of a reaction is measured at different temperatures (T), and the data are plotted in the...

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The correct order of the first ionization enthalpies is :

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The stoichiometry and solubility product of a salt with the solubility curve given below is, respectively

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Reaction of ammonia with excess Cl2 gives

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The increasing order of nucleophilicity of the following nucleophiles is: (a) $\mathrm{CH}_3 \mathrm{CO}_2^{\ominus}$ (b) $\mathrm{H}_2 \mathrm{O}$ (c) $\mathrm{CH}_3 \mathrm{CO}_3^{\ominus}$ (d)...

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Q JEE-MAIN 2020

Among the following compounds geometrical isomerism is exhibited by

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A graph of vapour pressure and temperature for three different liquids X, Y, and Z is shown below The following...

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Hydrogen peroxide, in the pure state, is

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Air pollution that occurs in sunlight is :

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The following molecule acts as an

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The predominant intermolecular forces present in ethyl acetate, a liquid, are

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An element crystallises in a face-centred cubic (fcc) unit cell with cell edge a. The distance between the centres of...

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The first ionization energy (in kJ/mol) of Na, Mg, Al and Si respectively, are

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The increasing order of boiling points of the following compounds is

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The ratio of the shortest wavelength of two spectral series of hydrogen spectrum is found to be about 9. The...

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For the Balmer series in the spectrum of H atom, $\bar{v}=\mathrm{R}_{\mathrm{H}}\left\{\frac{1}{\mathrm{n}_1^2}-\frac{1}{\mathrm{n}_2^2}\right\}$, the correct statements among (I) to (VI) are (I)...

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The variation of molar conductivity with concentration of an electrolyte (X) in aqueous solution is shown in the given figure....

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Q JEE MAIN 2019

Compound $\mathrm{A}\left(\mathrm{C}_9 \mathrm{H}_{10} \mathrm{O}\right)$ shows positive iodoform test. Oxidation of A with $\mathrm{KMnO}_4 / \mathrm{KOH}$ gives acid $\mathrm{B}\left(\mathrm{C}_8 \mathrm{H}_6 \mathrm{O}_4\right)$....

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1 g of a non-volatile non-electrolyte solute is dissolved in 100 g of two different solvents A and B whose...

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The decreasing order of reactivity towards dehydrohalogenation $\left(\mathrm{E}_1\right)$ reaction of the following compounds is

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Consider the complex ions, trans- $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]_{\sim}^{+}(\mathrm{A})$ and cis- $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]_{\sim}^{+}(\mathrm{B})$. The correct statement regarding them is

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The major product ‘Y’ in the following reaction is :

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Q JEE-MAIN 2020

The correct statement about probability density (except at infinite distance from nucleus) is

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As per Hardy-Schulze formulation, the flocculation values of the following for ferric hydroxide sol are in the order

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Adsorption of a gas follows Freundlich adsorption isotherm. If x is the mass of the gas adsorbed on mass m...

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Q JEE MAIN 2019

The major product ‘Y’ in the following reaction is :

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Q JEE MAIN 2020

The complex that can show fac-and mer-isomers is

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The compound that has the largest H – M – H bond angle (M = N, O, S, C) is

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Which one of the following polymers is not obtained by condensation polymerisation?

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The major product of the following reaction is

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For the reaction of $\mathrm{H}_2$ with $\mathrm{I}_2$, the rate constant is $2.5 \times 10^{-4} \mathrm{dm} 3 \mathrm{~mol}^{-1} \mathrm{~s}^{-1}$ at $...

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Q JEE MAIN 2019

The number of pentagons in $\mathrm{C}_{60}$ and trigons (triangles) in white phosphorus, respectively, are:

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Q JEE MAIN 2019

The major product obtained in the given reaction is:

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The correct option among the following is :

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Q JEE Main 2019

The decreasing order of ease of alkaline hydrolysis for the following esters is

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Q JEE MAIN 2019

The highest possible oxidation states of uranium and plutonium, respectively, are :

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Which primitive unit cell has unequal edge lengths (a ≠ b ≠ c) and all axial angles different from 90°?

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Which of these factors does not govern the stability of a conformation in acyclic compounds?

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Two pi and half sigma bonds are present in

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A hydrated solid X on heating initially gives a monohydrated compound Y. Y upon heating above 373 K leads to...

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A mixture of 100 m mol of $\mathrm{Ca}(\mathrm{OH})_2$ and 2 g of sodium sulphate was dissolved in water and the...

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For the reaction, $$ \begin{aligned} & 2 \mathrm{SO}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{SO}_3(\mathrm{~g}) \\ & \Delta \mathrm{H}=-57.2 \mathrm{~kJ} \mathrm{~mol}^{-1} \text { and...

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Q JEE MAIN 2019

The crystal field stabilization energy (CFSE) of $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_2$ and $\mathrm{K}_2\left[\mathrm{NiCl}_4\right]$, respectively, are :

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Q JEE Main 2019

The effect of lanthanoid contraction in the lanthanoid series of elements by and large means

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The correct structure of product ‘P’ in the following reaction is

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Which one of the following graphs between molar conductivity ( $\Lambda_{\mathrm{m}}$ ) versus $\sqrt{\mathrm{C}}$ is correct?

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The difference between $\Delta \mathrm{H}$ and $\Delta \mathrm{U}(\Delta \mathrm{H}-\Delta \mathrm{U})$, when the combustion of one mole of heptane(I) is carried...

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Q JEE MAIN 2019

Number of stereo centers present in linear and cyclic structures of glucose are respectively :

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The INCORRECT statement is :

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Water filled in two glasses A and B have BOD values of 10 and 20, respectively. The correct statement regarding...

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The pH of a $0.02 \mathrm{M} \mathrm{NH}_4 \mathrm{Cl}$ solution will be [given $$ \left.\mathrm{K}_{\mathrm{b}}\left(\mathrm{NH}_4 \mathrm{OH}\right)=10^{-5} \text { and } \log...

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Which hydrogen in compound (E) is easily replaceable during brominating reaction in presence of light?

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The correct statement is :

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A 20.0 mL solution containing 0.2 g impure $\mathrm{H}_2 \mathrm{O}_2$ reacts completely with 0.316 g of $\mathrm{KMnO}_4$ in acid solution....

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The mass of ammonia in grams produced when 2.8 kg of dinitrogen quantitatively reacts with 1 kg of dihydrogen is

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The number of molecules with energy greater than the threshold energy for a reaction increases five fold by a rise...

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A 100 mL solution was made by adding 1.43 g of $\mathrm{Na}_2 \mathrm{CO}_3 \cdot \mathrm{xH}_2 \mathrm{O}$. The normality of the...

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At 300 K, the vapour pressure of a solution containing 1 mole of n-hexane and 3 moles of n-heptane is...

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If 75% of a first order reaction was completed in 90 minutes, 60% of the same reaction would be completed...

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Which of the graphs shown below does not represent the relationship between incident light and the electron ejected from metal...

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The number of chiral centres present in [B] is

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Which dicarboxylic acid in presence of a dehydrating agent is least reactive to give an anhydride?

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On heating, lead (II) nitrate gives a brown gas (A). The gas (A) on cooling changes to a colourless solid/liquid...

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The major product of the following reaction is

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Identify the incorrect statement from the option below for the above cell:

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The intermolecular potential energy for the molecules A, B, C and D given below suggests that :

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Which of the following is not an example of heterogeneous catalytic reaction?

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The pair in which both the species have the same magnetic moment (spin only) is

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The total number of isomers for a square planar complex $\left[\mathrm{M}(\mathrm{F})(\mathrm{Cl})(\mathrm{SCN})\left(\mathrm{NO}_2\right)\right]$ is

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The increasing order of the $\mathrm{pK}_{\mathrm{a}}$ values of the following compounds is

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$[\mathrm{P}]$ on treatment with $\mathrm{Br}_2 / \mathrm{FeBr}_3$ in $\mathrm{CCl}_4$ produced a single isomer $\mathrm{C}_8 \mathrm{H}_7 \mathrm{O}_2 \mathrm{Br}$ while heating $[\mathrm{P}]$...

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The total number of isotopes of hydrogen and number of radioactive isotopes among them, respectively, are

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The number of isomers possible for $\left[\mathrm{Pt}(\mathrm{en})\left(\mathrm{NO}_2\right)_2\right]$ is

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Hall-Heroult’s process is given by

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The major product ‘X’ formed in the following reaction is

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When neopentyl alcohol is heated with an acid, it slowly converted into an 85 : 15 mixture of alkenes A...

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The metal used for making X-ray tube window is

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The ionic radii of $\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+}$and $\mathrm{Mg}^{2+}$ are in the order

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Wilkinson catalyst is $\left(\mathrm{Et}=\mathrm{C}_2 \mathrm{H}_5\right)$

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The region in the electromagnetic spectrum where the Balmar series lines appear is

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On combustion of Li, Na and K in excess of air, the major oxides formed, respectively, are

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The type of hybridisation and number of lone pair(s) of electrons of $X e$ in $X e O F_4$, respectively,...

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If dichloromethane (DCM) and water $\left(\mathrm{H}_2 \mathrm{O}\right)$ are used for differential extraction, which one of the following statements is correct?

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For the equilibrium $\mathrm{A} \rightleftharpoons \mathrm{B}$, the variation of the rate of the forward (a) and reverse (b) reaction with...

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Liquids $A$ and $B$ form an ideal solution in the entire composition range. At 350 K , the vapor pressures...

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The values of $\frac{K_p}{K_c}$ for the following reactions at 300 K are, respectively (At $300 \mathrm{~K}, \mathrm{RT}=24.62 \mathrm{dm}^3 \mathrm{~atm} \mathrm{~mol}^{-1}$...

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The osmotic pressure of a solution of NaCl is 0.10 atm and that of a glucose solution is 0.20 atm...

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Consider the following equations : $$ 2 \mathrm{Fe}^{2+}+\mathrm{H}_2 \mathrm{O}_2 \rightarrow x A+y B $$ (in basic medium) $$ 2 \mathrm{MnO}_4^{-}+6...

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The number of chiral centres present in threonine is ________.

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The mechanism of action of “Terfenadine” (Seldane) is :

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The electronegativity of aluminium is similar to

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Q JEE MAIN 2020

Match the following

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Which of the following compounds will form the precipitate with aq. $\mathrm{AgNO}_3$ solution most readily?

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Consider the given plots for a reaction obeying Arrhenius equation $\left(0^{\circ} \mathrm{C}

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Among statements (a) - (d), the correct ones are (a) Lime stone is decomposed to CaO during the extraction of...

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Consider the following reduction processes: $$ \begin{aligned} & \mathrm{Zn}^2++2 \mathrm{e}^{-} \rightarrow \mathrm{Zn}(\mathrm{~s}) ; \mathrm{E}^{\circ}=-0.76 \mathrm{~V} \\ & \mathrm{Ca}^{2+}+2 \mathrm{e}^{-} \rightarrow...

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A sample of red ink (a colloidal suspension) is prepared by mixing eosin dye, egg white, HCHO and water. The...

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The chemical nature of hydrogen peroxide is

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A sample of milk splits after 60 min. at 300 K and after 40 min. at 400 K when the...

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The major product of the following reaction is

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The molecule in which hybrid MOs involve only one d-orbital of the central atom is

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The sum of the total number of bonds between chromium and oxygen atoms in chromate and dichromate ions is ____________...

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The IUPAC name of the following compound is

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The major product [C] of the following reaction sequence will be

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The decreasing order of reactivity of the following organic molecules towards $\mathrm{AgNO}_3$ solution is

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10.30 mg of $\mathrm{O}_2$ is dissolved into a litre of sea water of density $1.03 \mathrm{~g} / \mathrm{mL}$. The concentration...

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Q JEE MAIN 2020

250 mL of a waste solution obtained from the workshop of a goldsmith contains $0.1 \mathrm{M} \mathrm{AgNO}_3$ and 0.1 M...

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Q JEE MAIN 2020

The elements with atomic numbers 101 and 104 belong to, respectively,

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Consider the following reactions

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The standard reaction Gibbs energy for a chemical reaction at an absolute temperature T is given by $\Delta_{\mathrm{r}} \mathrm{G}^{\circ}=\mathrm{A}-\mathrm{BT}$ Where...

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An organic compound (A) (molecular formula $\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_2$ ) was hydrolysed with dil. $\mathrm{H}_2 \mathrm{SO}_4$ to give a carboxylic...

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Q JEE MAIN 2020

Five moles of an ideal gas at 1 bar and 298 K is expanded into vacuum to double the volume....

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For one mole of an ideal gas, which of these statements must be true? (a) U and H each depends...

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A cylinder containing an ideal gas $(0.1 \mathrm{~mol}$ of 1.0 $\mathrm{dm}^3$ ) is in thermal equilibrium with a large volume...

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25 ml of the given HCl solution requires 30 mL of 0.1 M sodium carbonate solution. What is the volume...

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What are the functional groups present in the structure of maltose?

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The reaction $\mathrm{MgO}(\mathrm{s})+\mathrm{C}(\mathrm{s}) \rightarrow \mathrm{Mg}(\mathrm{s})+\mathrm{CO}(\mathrm{g})$, for which $\quad \Delta_{\mathrm{r}} \mathrm{H}^{\circ}=+491.1 \mathrm{~kJ} \mathrm{~mol}^{-1}$ and $\Delta_{\mathrm{r}} \mathrm{S}^{\circ}=198.0 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$, is not feasible...

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The shortest wavelength of H atom in the Lyman series is $\lambda_1$. The longest wavelength in the Balmar series of...

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Q JEE MAIN 2020

Which of the following will react with $\mathrm{CHCl}_3+$ alc. KOH ?

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Among the statements (a)-(d), the correct ones are (a) Lithium has the highest hydration enthalpy among the alkali metals. (b)...

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Q JEE MAIN 2019

The higher concentration of which gas in air can cause stiffness of flower buds?

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The isomer(s) of $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]$ that has/have a $\mathrm{Cl}-\mathrm{Co}-\mathrm{Cl}$ angle of $90^{\circ}$, is/are

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Q JEE MAIN 2020

An alkaline earth metal ‘M’ readily forms water soluble sulphate and water insoluble hydroxide. Its oxide MO is very stable...

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A, B and C are three biomolecules. The results of the tests performed on them are given below

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The reaction in which the hybridisation of the underlined atom is affected is

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The coordination number of Th in $\mathrm{K}_4\left[\mathrm{Th}\left(\mathrm{C}_2 \mathrm{O}_4\right)_4\left(\mathrm{OH}_2\right)_2\right]$ is $\left(\mathrm{C}_2 \mathrm{O}_4^{2-}=\right.$ Oxalato $)$

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For the equilibrium

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The first and second ionisation enthalpies of a metal are 496 and $4560 \mathrm{~kJ} \mathrm{~mol}^{-1}$, respectively. How many moles of...

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If the equilibrium constant for $\mathrm{A} \rightleftharpoons \mathrm{B}+\mathrm{Cis}_{\mathrm{eq}}^{(1)}$ and that of $\mathrm{B}+\mathrm{C} \rightleftharpoons \mathrm{P}$ is $\mathrm{K}_{\mathrm{eq}}^{(2)}$, the equilibrium constant for...

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Which of the following reactions will not produce a racemic product?

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The hydride that is NOT electron deficient is

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In the following reaction sequence, [C] is

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The correct order of the spin-only magnetic moments of the following complexes is : (I) $\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Br}_2$ (II) $\mathrm{Na}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$...

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The Crystal Field Stabilization Energy $(\mathrm{CFSE})$ of $\left[\mathrm{CoF}_3\left(\mathrm{H}_2 \mathrm{O}\right)_3\right]\left(\Delta_0

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Which of the following compounds reacts with ethylmagnesium bromide and also decolourizes bromine water solution?

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The reaction that does NOT define calcination is:

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The one that can exhibit highest paramagnetic behaviour among the following is gly = glycinato; bpy = 2, 2'-bipyridine

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In the figure shown below reactant A (represented by square) is in equilibrium with product B (represented by circle). The...

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The homopolymer formed from 4-hydroxy-butanoic acids is :

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Biochemical Oxygen Demand (BOD) is the amount of oxygen required (in ppm)

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The process that is NOT endothermic in nature is

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The relative stability of +1 oxidation state of group 13 elements follows the order :

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The decreasing order of basicity of the following amines is

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The incorrect statement(s) among (a) - (c) is (are) (a) W(VI) is more stable than Cr(VI). (b) In the presence...

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Taj Mahal is being slowly disfigured and discoloured. This is primarily due to :

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The major product of the following reaction is :

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The true statement amongst the following is

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The processes of calcination and roasting in metallurgical industries, respectively, can Iead to

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$$ \begin{aligned} & \underline{\mathrm{A}} \xrightarrow{4 \mathrm{KOH}, \mathrm{O}_2} \underset{(\text { Green })}{2 \mathrm{~B}}+2 \mathrm{H}_2 \mathrm{O} \\ & \underline{3 \mathrm{~B}} \xrightarrow{4 \mathrm{HCl}}...

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The major product obtained in the following reaction is:

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5 g of zinc is treated separately with an excess of (a) Dilute hydrochloric acid and (b) Aqueous sodium hydroxide....

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The number of bridging CO ligand(s) and Co -Co bond(s) in $\mathrm{Co}_2(\mathrm{CO})_8$, respectively are:

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Which of the following compounds will produce a precipitate with $\mathrm{AgNO}_3$ ?

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The solubility product of $\mathrm{Cr}(\mathrm{OH})_3$ at 298 K is $6.0 \times 10^{-31}$. The concentration of hydroxide ions in a saturated...

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The correct match between Item I and Item II is:

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Which of the following has the shortest C – Cl bond?

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The correct match between Item I and Item II is:

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The reaction of $\mathrm{H}_3 \mathrm{~N}_3 \mathrm{~B}_3 \mathrm{Cl}_3$ (A) with $\mathrm{LiBH}_4$ in tetrahydrofuran gives inorganic benzene (B). Further, the reaction of...

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The correct option with respect to the Pauling electronegativity values of the elements is:

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Amongst the following, the form of water with the lowest ionic conductance at 298 K is

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The de Broglie wavelength ( $\lambda$ ) associated with a photoelectron varies with the frequency ( $v$ ) of the...

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Match the following items in column I with the corresponding items in column II.

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$\mathrm{K}_2 \mathrm{Hgl}_4$ is $40 \%$ ionised in aqueous solution. The value of its van't Hoff factor (i) is :

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Which polymer has ‘chiral’ monomer(s)?

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Complexes (ML5) of metals Ni and Fe have ideal square pyramidal and trigonal bipyramidal geometries, respectively. The sum of the...

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In the following sequence of reactions the maximum number of atoms present in molecule ‘C’ in one plane is __________....

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$\mathrm{NaClO}_3$ is used, even in spacecrafts, to produce $\mathrm{O}_2$. The daily consumption of pure $\mathrm{O}_2$ by a person is 492...

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In the following reaction A is

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In the following compound, the favourable site/s for protonation is/are :

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If $250 \mathrm{~cm}^3$ of an aqueous solution containing 0.73 g of a protein A is isotonic with one litre of...

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For an electrochemical cell, $\mathrm{Sn}(\mathrm{s})\left|\mathrm{Sn}^{2+}(\mathrm{aq}, 1 \mathrm{M}) \| \mathrm{Pb}^{2+}(\mathrm{aq}, 1 \mathrm{M})\right| \mathrm{Pb}(\mathrm{s})$ the ratio $\frac{\left[\mathrm{Sn}^{2+}\right]}{\left[\mathrm{Pb}^{2+}\right]}$ when this cell attains equilibrium...

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The volume (in mL) of 0.1 N NaOH required to neutralise 10 mL of 0.1 N phosphinic acid is ____.

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At constant volume, 4 mol of an ideal gas when heated from 300 K to 500 K changes its internal...

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An acidic solution of dichromate is electrolyzed for 8 minutes using 2 A current. As per the following equation $...

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The reaction $2 X \rightarrow B$ is a zeroth order reaction. If the initial concentration of $X$ is $0.2 M$,...

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An unsaturated hydrocarbon $X$ absorbs two hydrogen molecules on catalytic hydrogenation, and also gives following reaction $...

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$6.023 \times 10^{22}$ molecules are present in 10 g of a substance ' x '. The molarity of a solution...

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The radius of the largest sphere which fits properly at the centre of the edge of a body centred cubic...

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Among the colloids cheese (C), milk (M) and smoke (S), the correct combination of the dispersed phase and dispersion medium,...

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Among (a) - (d), the complexes that can display geometrical isomerism are (a) $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}\right]^{+}$ (b) $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right) \mathrm{Cl}_5\right]^{-}$ (c) $...

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The number of $\mathrm{sp}^2$ hybrid orbitals in a molecule of benzene is

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Complex A has a composition of $\mathrm{H}_{12} \mathrm{O}_6 \mathrm{Cl}_3 \mathrm{Cr}$. If the complex on treatment with conc. $\mathrm{H}_2 \mathrm{SO}_4$ loses...

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Given the equilibrium constant : $\mathrm{K}_{\mathrm{C}}$ of the reaction:- $\mathrm{Cu}(\mathrm{s})+2 \mathrm{Ag}^{+}(\mathrm{aq}) \rightarrow \mathrm{Cu}^{2+}(\mathrm{aq})+2 \mathrm{Ag}(\mathrm{s})$ is $10 \times 10^{15}$ calculate the...

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Consider the following reaction : The product ‘P’ gives positive ceric ammonium nitrate test. This is because of the presence...

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Kjeldahl’s method cannot be used to estimate nitrogen for which of the following compounds?

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Two monomers in maltose are

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The compound A in the following reactions is

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White phosphorus on reaction with concentrated NaOH solution in an inert atmosphere of CO2 gives phosphine and compound (X). (X)...

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A mixture of one mole each of $\mathrm{H}_2, \mathrm{He}$ and $\mathrm{O}_2$ each are enclosed in a cylinder of volume $V$...

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Arrange the following bonds according to their average bond energies in descending order C – Cl, C – Br, C...

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The major product in the following reaction is

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For the following Assertion and Reason, the correct option is Assertion : For hydrogenation reactions, the catalytic activity increases from...

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The d-electron configuration of $\left[\mathrm{Ru}(\mathrm{en})_3\right] \mathrm{Cl}_2$ and $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_2$ , respectively are

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Consider the following plots of rate constant versus $\frac{1}{\top}$ for four different reactions. Which of the following orders is correct...

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An ionic micelle is formed on the addition of

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The five successive ionization enthalpies of an element are 800, 2427, 3658, 25024 and 32824 kJ mol–1. The number of...

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The strengths of 5.6 volume hydrogen peroxide (of density 1 g/mL) in terms of mass percentage and molarity (M), respectively,...

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A metal (A) on heating in nitrogen gas gives compound B. B on treatment with $\mathrm{H}_2 \mathrm{O}$ gives a colourless...

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Consider the following molecules and statements related to them

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Match the following drugs with their therapeutic actions

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100 mL of 0.1 M HCl is taken in a beaker and to it 100 mL of 0.1 M NaOH...

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Among the statements (I – IV), the correct ones are (I) Be has smaller atomic radius compared to Mg. (II)...

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The increasing order of the reactivity of the following compounds in nucleophilic addition reaction is Propanal, Benzaldehyde, Propanone, Butanone

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The incorrect statement(s) among (a) – (d) regarding acid rain is (are) (a) It can corrode water pipes. (b) It...

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The maximum number of possible oxidation states of actinoides are shown by

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Which one of the following about an electron occupying the 1s orbital in a hydrogen atom is incorrect? (The Bohr...

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The decreasing order of reactivity of the following compounds towards nucleophilic substitution $\left(\mathrm{S}_{\mathrm{N}} 2\right)$ is

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10 mL of 1 mM surfactant solution forms a monolayer covering $0.24 \mathrm{~cm}^2$ on a polar substrate. If the polar...

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Consider the hypothetical situation where the azimuthal quantum number,l, takes value 0, 1, 2, ... n + 1, where n...

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The incorrect statement is

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For the following Assertion and Reason, the correct option is Assertion : The pH of water increases with increase in...

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p-Hydroxybenzophenone upon reaction with bromine in carbon tetrachloride gives

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The structures of beryllium chloride in the solid state and vapour phase, respectively, are

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The major product in the following reaction is

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In the following reaction carbonyl compound $+\mathrm{MeOH} \stackrel{\mathrm{HCl}}{\rightleftharpoons}$ acetal Rate of the reaction is the highest for

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Hydrogen has three isotopes (A), (B) and (C). If the number of neutron(s) in (A), (B) and (C) respectively, are...

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The major product [B] in the following sequence of reactions is

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The correct statements among I to III are (I) Valence bond theory cannot explain the color exhibited by transition metal...

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The correct order of the calculated spin-only magnetic moments of complexes (A) to (D) is (A) $\mathrm{Ni}(\mathrm{CO})_4$ (B) $...

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The amorphous form of silica is

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At a given temperature T , gases $\mathrm{Ne}, \mathrm{Ar}, \mathrm{Xe}$ and Kr are found to deviate from ideal gas behaviour....

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The radius of the second Bohr orbit, in terms of the Bohr radius, $\mathbf{a}_0$, in $\mathrm{Li}^{2+}$ is

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Assertion : For the extraction of iron, haematite ore is used. Reason : Haematite is a carbonate ore of iron.

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The increasing order of the atomic radii of the following elements is (a) C (b) O (c) F (d) CI...

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The layer of atmosphere between 10 km to 50 km above the sea level is called as

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Among the reactions (a) - (d), the reaction(s) that does/do not occur in the blast furnace during the extraction of...

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Hinsberg’s reagent is

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Which of the following compounds is likely to show both Frenkel and Schottky defects in its crystalline form ?

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Among the compounds $A$ and $B$ with molecular formula $\mathrm{C}_9 \mathrm{H}_{18} \mathrm{O}_3, A$ is having higher boiling point the $B$....

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Molal depression constant for a solvent is $4.0 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$. The depression in the freezing point of the solvent...

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Which of the following potential energy (PE) diagrams represents the $\mathrm{S}_{\mathrm{N}} 1$ reaction?

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Chlorine reacts with hot and concentrated NaOH and produces compounds (X) and (Y). Compound (X) gives white precipitate with silver...

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Data given for the following reaction is as follows:

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For the reaction $\mathrm{A}(\mathrm{l}) \rightarrow 2 \mathrm{~B}(\mathrm{~g})$ $\Delta \mathrm{U}=2.1 \mathrm{kcal}, \Delta \mathrm{S}=20 \mathrm{cal} \mathrm{K}^{-1}$ at 300 K . Hence $...

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The major products A and B for the following reactions are, respectively

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The number of chiral carbons in chloramphenicol is ___________.

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The number of species having non–pyramidal shape among the following is

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During the nuclear explosion, one of the products is ${ }^{90} \mathrm{Sr}$ with half life of 6.93 years. If $...

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The correct statements among I to III regarding group 13 element oxides are, (I) Boron trioxide is acidic. (II) Oxides...

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Two solutions, $A$ and $B$, each of $100 L$ was made by dissolving 4 g of NaOH and 9.8 g...

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Among the following species, the diamagnetic molecule is

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When 5.1 g of solid $\mathrm{NH}_4 \mathrm{HS}$ is introduced into a two litre evacuated flask at $27^{\circ} \mathrm{C}, 20 \%$...

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Noradrenaline is a / an

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The number of photons emitted by a monochromatic (single frequency) infrared range finder of power 1 mW and wavelength of...

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The one that is not a carbonate ore is

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The dipole moments of $\mathrm{CCl}_4, \mathrm{CHCl}_3$ and $\mathrm{CH}_4$ are in the order :

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The resistance of a conductivity cell with cell constant $1.14 \mathrm{~cm}^{-1}$, containing 0.001 M KCl at 298 K is $...

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HF has highest boiling point among hydrogen halides, because it has

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40 g of glucose (Molar mass $=180$ ) is mixed with 200 mL of water. The freezing point of solution...

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1-methylethylene oxide when treated with an excess of HBr produces:

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A solution of $\mathrm{Ni}\left(\mathrm{NO}_3\right)_2$ is electrolysed between platinum electrodes using 0.1 Faraday electricity. How many mole of Ni will be...

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100 g of propane is completely reacted with 1000 g of oxygen. The mole fraction of carbon dioxide in the...

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The number of orbitals associated with quantum numbers $\mathrm{n}=5, \mathrm{~m}_{\mathrm{s}}=+\frac{1}{2}$ is:

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What would be the molality of $20 \%$ (mass/mass) aqueous solution of KI? (molar mass of $\mathrm{KI}=166 \mathrm{~g} \mathrm{~mol}^{-1}$ )

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The theory that can completely/properly explain the nature of bonding in $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ is :

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The IUPAC name of the complex $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2\right. \left.\mathrm{Cl}\left(\mathrm{NH}_2 \mathrm{CH}_3\right)\right] \mathrm{Cl}$ is :

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In which one of the following sets all species show disproportionation reaction ?

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Two flasks I and II shown below are connected by a valve of negligible volume. When the valve is opened,...

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During compression of a spring the work done is 10 kJ and 2 kJ escaped to the surroundings as heat....

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The electron gain enthalpy (in kJ/mol) of fluorine, chlorine, bromine and iodine, respectively, are :

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A chloro compound "A". (i) forms aldehydes on ozonolysis followed by the hydrolysis. (ii) when vaporized completely 1.53 g of...

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Which of the following compounds is a constituent of the polymer

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Consider the following reactions : Which of these reaction(s) will not produce Saytzeff product ?

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The reaction rate for the reaction| $$ \left[\mathrm{PtCl}_4\right]^{2-}+\mathrm{H}_2 \mathrm{O} \rightleftharpoons\left[\mathrm{Pt}\left(\mathrm{H}_2 \mathrm{O}\right) \mathrm{Cl}_3\right]^{-}+\mathrm{Cl}^{-} $$ was measured as a function of concentrations...

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The number of optical isomers possible for $\left[\mathrm{Cr}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$ is

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The peptide that gives positive ceric ammonium nitrate and carbylamine tests is

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The purest form of commercial iron is

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The major product of the following reaction is :

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SECTION-B The first order rate constant for the decomposition of $\mathrm{CaCO}_3$ at 700 K is $6.36 \times 10^{-3} \mathrm{~s}^{-1}$ and...

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83 g of ethylene glycol dissolved in 625 g of water. The freezing point of the solution is _______K. (Nearest...

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Amongst the following statements, that which was not proposed by Dalton was :

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A solution of m-chloroaniline, m-chlorophenol and m-chlorobenzoic acid in ethyl acetate was extracted initially with a saturated solution of $\mathrm{NaHCO}_3$...

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The transformation occurring in Duma's method is given below :

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The overall stability constant of the complex ion $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}$ is $2.1 \times 10^{13}$. The overall dissociations constant is $...

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The correct structures of A and B formed in the following reactions are

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100 mL of $\mathrm{Na}_3 \mathrm{PO}_4$ solution contains 3.45 g of sodium. The molarity of the solution is $\_\_\_\_$ $...

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What is the product of following reaction?

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For the galvanic cell $$ \mathrm{Zn}(\mathrm{~s})+\mathrm{Cu}^{2+}(0.02 \mathrm{M}) \rightarrow \mathrm{Zn}^{2+}(0.04 \mathrm{M})+\mathrm{Cu}(\mathrm{~s}) $$ $\mathrm{E}_{\text {cell }}=$ $\_\_\_\_$ $\times 10^{-2} \mathrm{~V}$. (Nearest integer)...

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The relative strength of interionic/ intermolecular forces in decreasing order is :

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Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at 803 K...

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$$ \text { According to molecular orbital theory, the number of unpaired electron(s) in } \mathrm{O}_2^{2-} \text { is :...

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Consider the following reaction: The product ‘X’ is used

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Sodium oxide reacts with water to produce sodium hydroxide. 20.0 g of sodium oxide is dissolved in 500 mL of...

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A metal surface is exposed to 500 nm radiation. The threshold frequency of the metal for photoelectric current is $...

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Oxidation number of potassium in $\mathrm{K}_2 \mathrm{O}, \mathrm{K}_2 \mathrm{O}_2$ and $\mathrm{KO}_2$, respectively, is

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Hydrolysis of sucrose gives

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For water $\Delta_{\text {vap }} \mathrm{H}=41 \mathrm{~kJ} \mathrm{~mol}^{-1}$ at 373 K and 1 bar pressure. Assuming that water vapour is...

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Q JEE MAIN 2021

For the reaction $\mathrm{A} \rightarrow \mathrm{B}$, the rate constant $\mathrm{k}\left(\right.$ in $\left.\mathrm{s}^{-1}\right)$ is given by $$ \log _{10} k=20.35-\frac{\left(2.47 \times...

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Q JEE MAIN 2020

The increasing order of $\mathrm{pK}_{\mathrm{b}}$ for the following compounds will be

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Q JEE MAIN 2021

If the concentration of glucose $\left(\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6\right)$ in blood is 0.72 g $L^{-1}$, the molarity of glucose in blood...

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Q JEE-MAIN 2021

The equilibrium constant Kc at 298 K for the reaction $\mathrm{A}+\mathrm{B} \rightleftharpoons \mathrm{C}+\mathrm{D}$ is 100 . Starting with an equimolar...

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Q JEE MAIN 2021

In the above first order reaction the initial concentration of $\mathrm{N}_2 \mathrm{O}_5$ is $2.40 \times 10^{-2} \mathrm{~mol} \mathrm{~L}^{-1}$ at 318...

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Q JEE MAIN 2020

Match the following

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The pH of a solution obtained by mixing 50 mL of 1 M HCl and 30 mL of 1 M...

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Q JEE MAIN 2021

Which one of the following tests used for the identification of functional groups in organic compounds does not use copper...

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Q JEE MAIN 2021

Number of electrons that Vanadium (Z = 23) has in p-orbitals is equal to ______

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In the sulphur estimation, 0.471 g of an organic compound gave 1.44 g of barium sulphate. The percentage of sulphur...

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Q JEE MAIN 2021

A copper complex crystallising in a CCP lattice with a cell edge of 0.4518 nm has been revealed by employing...

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Q JEE MAIN 2020

At $35^{\circ} \mathrm{C}$, the vapour pressure of $\mathrm{CS}_2$ is 512 mm Hg and that of acetone is 344 mm Hg...

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Q JEE-MAIN 2021

Consider the given reaction, the product A is :

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Q JEE-MAIN 2021

Consider the given reaction, Identify 'X' and 'Y'

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An aqueous KCl solution of density $1.20 \mathrm{~g} \mathrm{~mL}^{-1}$ has a molality of $3.30 \mathrm{~mol} \mathrm{~kg}^{-1}$. The molarity of the...

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Q JEE MAIN 2021

The total number of negative charge in the tetrapeptide, Gly-Glu-Asp-Tyr, at pH 12.5 will be ________. (Integer answer)

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Q JEE MAIN 2021

The Born-Haber cycle for KCl is evaluated with the following data: $...

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If the standard molar enthalpy change for combustion of graphite powder is $-2.48 \times 10^2 \mathrm{~kJ} \mathrm{~mol}^{-1}$ , the amount...

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Q JEE MAIN 2021

The following data was obtained for chemical reaction given below at 975 K . $...

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The ratio of number of water molecules in Mohr's salt and potash alum is $\_\_\_\_$ $\times 10^{-1}$. (Integer answer)

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Q JEE MAIN 2021

The number of 4f electrons in the ground state electronic configuration of Gd2+ is ________. [Atomic number of Gd =...

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Q JEE MAIN 2021

The $\mathrm{OH}^{-}$concentration in a mixture of 5.0 mL of $0.0504 \mathrm{M} \mathrm{NH}_4 \mathrm{Cl}$ and 2 mL of $0.0210 \mathrm{MNH}_3$ solution...

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Q JEE MAIN 2021

Of the following four aqueous solutions, total number of those solutions whose freezing point is lower than that of $...

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These are physical properties of an element (A) Sublimation enthalpy (B) Ionisation enthalpy (C) Hydration enthalpy (D) Electron gain enthalpy...

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$\mathrm{AB}_3$ is an interhalogen T-shaped molecule. The number of lone pairs of electrons on A is $\_\_\_\_$ (Integer answer)

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In the electrolytic refining of blister copper, the total number of main impurities, from the following, removed as anode mud...

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The empirical formula for a compound with a cubic close packed arrangement of anions and with cations occupying all the...

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Potassium permanganate on heating at 513 K gives a product which is

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The major product of the following reaction, if it occurs by $\mathrm{SN}_2$ mechanism is

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1.22 g of an organic acid is separately dissolved in 100 g of benzene $\left(\mathrm{K}_{\mathrm{b}}=2.6 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\right)$ and 100...

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Q JEE MAIN 2019

The major product of the following reaction is :

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Lyophilic sols are more stable than lyophobic sols because

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$\mathrm{CH}_4$ is adsorbed on 1 g charcoal at $0^{\circ} \mathrm{C}$ following the Freundlich adsorption isotherm. 10.0 mL of $\mathrm{CH}_4$ is...

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Q JEE MAIN 2019

Which is the most suitable reagent for the following transformation?

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Which one of the following is used to remove most of plutonium from spent nuclear fuel

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The number of S=O bonds present in sulphurous acid, peroxodisulphuric acid and pyrosulphuric acid, respectively are :

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Q JEE MAIN 2019

The reaction that is NOT involved in the ozone layer depletion mechanism in the stratosphere is :

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Q JEE MAIN 2021

Identify correct A, B and C in the reaction sequence given below :

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A compound of formula A2B3 has the hcp lattice. Which atom forms the hcp lattice and what fraction of tetrahedral...

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Q JEE MAIN 2021

For the following :

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The major product (A) formed in the reaction given below is

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Elevation in the boiling point for 1 molal solution of glucose is 2 K . The depression in the freezing...

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Excess of isobutane on reaction with $\mathrm{Br}_2$ in presence of light at $125^{\circ} \mathrm{C}$ gives which one of the following,...

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The major product of the following reaction is :

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Q JEE MAIN 2021

Match List-I with List-II :

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The major product of the following reaction

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Which among the following is not a polyester ?

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Given that the standard potentials $\left(\mathrm{E}^{\circ}\right)$ of $\mathrm{Cu}^{2+} / \mathrm{Cu}$ and $\mathrm{Cu}^{+} / \mathrm{Cu}$ are 0.34 V and 0.522 V...

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Q JEE MAIN 2021

Which one of the following is the major product of the given reaction?

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What is the IUPAC name of the following compound?

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Q JEE MAIN 2021

Which one of the following statements is incorrect ?

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The atomic radius of Ag is closest to

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Q JEE MAIN 2021

The incorrect statement is:

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In comparison to the zeolite process for the removal of permanent hardness, the synthetic resins method is

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For an elementary chemical reaction, $A_2 \underset{k_{-1}}{\stackrel{k_1}{\rightleftharpoons}} 2 A$, the expression for $\frac{d[A]}{d t}$ is :

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Given below are two statements. Statement I: Frenkel defects are vacancy as well as interstitial defects. Statement II: Frenkel defect...

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Q JEE MAIN 2019

Haemoglobin and gold sol are examples of :

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The correct order of ionic radii for the ions, $\mathrm{P}^{3-}, \mathrm{S}^{2-}, \mathrm{Ca}^{2+}, \mathrm{K}^{+}, \mathrm{Cl}^{-}$is

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The correct sequential addition of reagents in the preparation of 3-nitrobenzoic acid from benzene is:

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The incorrect expression among the following is:

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The difference in the number of unpaired electrons of a metal ion in its high spin and low-spin octahedral complexes...

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Given below are two statements. Statement I: According to Bohr's model of an atom, qualitatively the magnitude of velocity of...

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Which one of the following reactions will not yield propionic acid?

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The major product obtained in the following reaction is:

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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The amount of sugar $\left(\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}\right)$ required to prepare 2 L of its 0.1 M aqueous solution is:

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Which of the following tests cannot be used for identifying amino acids?

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$$ \text { Spin only magnetic moment in } \mathrm{BM} \text { of }\left[\mathrm{Fe}(\mathrm{CO})_4\left(\mathrm{C}_2 \mathrm{O}_4\right)\right]^{+} \text {is : } $$

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What are the products formed in sequence when excess of $\mathrm{CO}_2$ is passed in slaked lime?

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Q JEE MAIN 2019

The 71st electron of an element X with an atomic number of 71 enters into the orbital:

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For the reaction given below :

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Given below are two statements. Statement I: The choice of reducing agents for metals extraction can be made by using...

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Which one of the following methods is most suitable for preparing deionized water?

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The number of 2-centre-2-electron and 3-centre-2-electron bonds in B2H6 respectively are:

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Among the following compounds I-IV, which one forms a yellow precipitate on reacting sequentially with (i) NaOH (ii) dil. $\mathrm{HNO}_3$...

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What will be the major product in the following mononitration reaction?

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Which of the following is NOT an example of fibrous protein ?

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Given below are two statements. Statement I: In the titration between strong acid and weak base methyl orange is suitable...

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$5.1 \mathrm{~g} \mathrm{NH}_4 \mathrm{SH}$ is introduced in 3.0 L evacuated flask at $327^{\circ} \mathrm{C} .30 \%$ of the solid $...

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Q JEE MAIN 2019

In the reaction of oxalate with permanganate in acidic medium, the number of electrons involved in producing one molecule of...

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Q JEE MAIN 2021

Match List-I with List-II

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Sodium metal on dissolution in liquid ammonia gives a deep blue solution due to the formation of

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A reaction of cobalt (III) chloride and ethylenediamine in a 1 : 2 mole ratio generates two isomeric products A...

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The oxide that gives $\mathrm{H}_2 \mathrm{O}_2$ most readily on treatment with $\mathrm{H}_2 \mathrm{O}$ is

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Q JEE MAIN 2019

The major product of the following reaction is :

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The conversion of hydroxyapatite occurs due to presence of F– ions in water. The correct formula of hydroxyapatite is:

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Which one of the following chemicals is responsible for the production of HCl in the stomach leading to irritation and...

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The electrolytes usually used in the electroplating of gold and silver, respectively, are :

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The compound/s which will show significant intermolecular H–bonding is/are

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Q JEE MAIN 2019

The correct match between item ‘I’ and item ‘II’ is :

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The correct options for the products A and B of the following reactions are :

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In stratosphere most of the ozone formation is assisted by :

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The $\mathrm{Eu}^{2+}$ ion is a strong reducing agent in spite of its ground state electronic configuration (outermost) : [Atomic number...

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In the cell $\mathrm{Pt}(\mathrm{s})\left|\mathrm{H}_2(\mathrm{~g}, 1 \mathrm{bar})\right| \mathrm{HCl}(\mathrm{aq})|\mathrm{AgCl}(\mathrm{s})| \mathrm{Ag}(\mathrm{s}) \mid \mathrm{Pt}(\mathrm{s})$ the cell potential is 0.92 V when a $10^{-6}$ molal...

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Given below are two statements: Statement 1: The limiting molar conductivity of KCl (strong electrolyte) is higher compared to that...

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Arrange the following conformational isomers of n-butane in order of their increasing potential energy :

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The ground state energy of hydrogen atom is -13.6 eV . The energy of second excited state of $\mathrm{He}^{+}$ion in...

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The polymer formed on heating Novolac with formaldehyde is :

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An aromatic compound 'A' having molecular formula $\mathrm{C}_7 \mathrm{H}_6 \mathrm{O}_2$ on treating with aqueous ammonia and heating forms compound '...

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Statement I : Ethyl pent- $4-$ yn-oate on reaction with $\mathrm{CH}_3 \mathrm{MgBr}$ gives a $3^{\circ}-$ alcohol. Statement II : In...

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The major product formed in the following reaction is :

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The process with negative entropy change is :

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The major product formed in the following reaction is :

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The addition of dilute NaOH to $\mathrm{Cr}^{3+}$ salt solution will give :

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For the cell $$ \mathrm{Cu}(\mathrm{~s})\left|\mathrm{Cu}^{2+}(\mathrm{aq})(0.1 \mathrm{M}) \| \mathrm{Ag}^{+}(\mathrm{aq})(0.01 \mathrm{M})\right| \mathrm{Ag}(\mathrm{~s}) $$ the cell potential $\mathrm{E}_1=0.3095 \mathrm{~V}$ For the cell $$...

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For the first order reaction $A \rightarrow 2 B, 1$ mole of reactlant $A$ gives 0.2 moles of $B$ after...

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Q JEE MAIN 2021

The major products formed in the following reaction sequence A and B are :

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When 10 mL of an aqueous solution of $\mathrm{KMnO}_4$ was titrated in acidic medium, equal volume of 0.1 M of...

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Q JEE MAIN 2021

Choose the correct statement from the following

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The dihedral angle in staggered form of Newman projection of 1,1,1-Trichloro ethane is $\_\_\_\_$ degree. (Round off to the nearest...

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The number of moles of $\mathrm{NH}_3$, that must be added to 2 L of $0.80 \mathrm{M} \mathrm{AgNO}_3$ in order to...

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Q JEE MAIN 2021

Which one of the following when dissolved in water gives coloured solution in nitrogen atmosphere?

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200 mL of 0.2 M HCl is mixed with 300 mL of 0.1 M NaOH . The molar heat of...

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Which one of the following compounds is not aromatic ?

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In a solvent 50\% of an acid HA dimerizes and the rest dissociates. The van't Hoff factor of the acid...

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A peptide synthesized by the reactions of one molecule each of Glycine, Leucine, Aspartic acid and Histidine will have ________...

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Q JEE-MAIN 2021

Chalcogen group elements are :

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Which one of the following is correct for the adsorption of a gas at a given temperature on a solid...

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The number of f electrons in the ground state electronic configuration of Np (Z = 93) is ________. (Nearest integer)

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3 moles of metal complex with formula $\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_3$ gives 3 moles of silver chloride on treatment with excess of...

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Q JEE-MAIN 2021

The class of drug to which chlordiazepoxide with above structure belongs is :

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Which one of the following complexes is violet in colour?

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The total number of electrons in all bonding molecular orbitals of $\mathrm{O}_2^{2-}$ is $\_\_\_\_$ (Round off to the nearest integer)

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The number of moles of CuO , that will be utilized in Dumas method for estimation nitrogen in a sample...

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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1 mol of an octahedral metal complex with formula $\mathrm{MCl}_3 \cdot 2 \mathrm{~L}$ on reaction with excess of $\mathrm{AgNO}_3$ gives...

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Q JEE MAIN_2021_

10.0 mL of $0.05 \mathrm{M} \mathrm{KMnO}_4$ solution was consumed in a titration with 10.0 mL of given oxalic acid dihydrate...

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1 kg of 0.75 molal aqueous solution of sucrose can be cooled up to $-4^{\circ} \mathrm{C}$ before freezing. The amount...

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Given below are two statements : Statement I : Sphalerite is a sulphide ore of zinc and copper glance is...

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$$ 2 \mathrm{SO}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{SO}_3(\mathrm{~g}) $$ The above reaction is carried out in a vessel starting with partial pressure...

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Q JEE MAIN 2021

The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is equal to $...

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If the conductivity of mercury at $0^{\circ} \mathrm{C}$ is $1.07 \times 10^6 \mathrm{~S} \mathrm{~m}^{-1}$ and the resistance of a cell...

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Q JEE-MAIN 2021

The sol given below with negatively charged colloidal particles is :

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When 400 mL of $0.2 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4$ solution is mixed with 600 mL of 0.1 M NaOH solution, the...

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Q JEE MAIN 2021

The reaction that occurs in a breath analyser, a device used to determine the alcohol level in a person's blood...

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Q JEE-MAIN 2021

Indicate the complex/complex ion which did not show any geometrical isomerism :

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In Carius method for estimation of halogens, 0.2 g of an organic compound gave 0.188 g of AgBr . The...

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Q JEE MAIN _2021

The equilibrium constant for the reaction $$ \mathrm{A}(\mathrm{~S}) \rightleftharpoons \mathrm{M}(\mathrm{~s})+\frac{1}{2} \mathrm{O}_2(\mathrm{~g}) $$ is $\mathrm{K}_p=4$. At equilibrium, the partial pressure of...

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Q JEE MAIN 2021

Tyndall effect is more effectively shown by :

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The major product in the above reaction is :

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The addition of silica during the extraction of copper from its sulphide ore:-

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In polythionic acid, $\mathrm{H}_2 \mathrm{~S}_{\mathrm{x}} \mathrm{O}_6(\mathrm{x}=3$ to 5$)$ the oxidation state(s) of sulphur is/are :

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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The correct sequence of correct reagents for the following transformation is:-

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The spin-only magnetic moment value of $\mathrm{B}_2^{\prime}$ species is $\_\_\_\_$ $\times 10^{-2} \mathrm{BM}$. (Nearest integer) $[$ Given: $\sqrt{3}=1.73]$

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The unit of the van der Waals gas equation parameter ' $a$ ' in $\left(P+\frac{a n^2}{V^2}\right)(V-n b)=n R T$ is...

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Q JEE-MAIN 2021

Match List-I with List-II :

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What is A in the following reaction?

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A 50 watt bulb emits monochromatic red light of wavelength of 795 nm . The number of photons emitted per...

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In the following sequence of reactions the P is :

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Given below are two statements : one is labelled as Assertion (A) and other is labelled as Reason (R). Assertion...

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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Q _JEE MAIN_2021_

Select the correct statements. (A) Crystalline solids have long range order. (B) Crystalline solids are isotropic. (C) Amorphous solid are...

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Q JEE-MAIN 2021

The bond order and magnetic behaviour of $\mathrm{O}_2^{-}$ion are, respectively :

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Q JEE MAIN 2021

Out of following isomeric forms of uracil, which one is present in RNA ?

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The number of non-ionisable hydrogen atoms present in the final product obtained from the hydrolysis of PCl5 is :

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Number of Cl = O bonds in chlorous acid, chloric acid and perchloric acid respectively are:

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The interaction energy of London forces between two particles is proportional to $\mathrm{r}^{\mathrm{x}}$, where r is the distance between the...

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The nature of oxides $\mathrm{V}_2 \mathrm{O}_3$ and CrO is indexed as ' X ' and ' Y ' type respectively....

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If 80 g of copper sulphate $\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}$ is dissolved in delonised water to make 5 L...

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If the Thompson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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Q JEE MAIN 2021

The number of water molecules in gypsum, dead burnt plaster and plaster of paris, respectively are:

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The number of atoms in 8 g of sodium is $\mathrm{x} \times 10^{23}$. The value of x is $\_\_\_\_$ (Nearest...

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Q _JEE MAIN_2021_

Match List - I with List - II:

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The gas 'A' is having very low reactivity reaches to stratosphere. It is non–toxic and non–flammable but dissociated by UV—radiations...

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Q JEE MAIN_2021_

consider the above reaction, and choose the correct statement :

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Which one of the following phenols does not give colour when condensed with phthalic anhydride in presence of conc.$\mathrm{H}_2 \mathrm{SO}_4$

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Q JEE MAIN 2021

Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a Prussian blue coloured colloidal species. It is...

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$$ \mathrm{R}-\mathrm{CN} \xrightarrow[\text { (ii) } \mathrm{H}_2 \mathrm{O}]{\text { (i) } \mathrm{OIBAL}-\mathrm{H}} \mathrm{R}-\mathrm{Y} $$ Consider the above reaction and identify...

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Q JEE MAIN 2021

Which of the following is not a correct statement for primary aliphatic amines?

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For the reaction $2 \mathrm{NO}_2(\mathrm{~g}) \mathrm{N}_2 \mathrm{O}_4(\mathrm{~g})$, when $\Delta \mathrm{S}=-176.0 \mathrm{JK}^{-1}$ and $\Delta \mathrm{H}=-57.8 \mathrm{~kJ} \mathrm{~mol}^{-1}$, the magnitude of $...

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The major product of the following reaction is :

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A peptide synthesized by the reactions of one molecule each of Glycine, Leucine, Aspartic acid and Histidine will have ________...

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Compound A gives D-Galactose and D-Glucose on hydrolysis. The compound A is:

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If the conductivity of mercury at $0^{\circ} \mathrm{C}$ is $1.07 \times 10^6 \mathrm{~S} \mathrm{~m}^{-1}$ and the resistance of a cell...

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Q JEE MAIN 2021

The correct statement about (A), (B), (C) and (D) is :

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The spin-only magnetic moment value of $\mathrm{B}_2^{+}$species is $\_\_\_\_$ $\times 10^{-2}$ BM. (Nearest integer) $[$ Given: $\sqrt{3}=1.73]$

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Given below are two statements : Statement I : Penicillin is a bacteriostatic type antibiotic. Statement II : The general...

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A 50 watt bulb emits monochromatic red light of wavelength of 795 nm. The number of photons emitted per second...

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Which refining process is generally used in the purification of low melting metals ?

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If 80 g of copper sulphate $\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}$ is dissolved in deionised water to make 5 L...

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To an aqueous solution containing ions such as $\mathrm{Al}^{3+}, \mathrm{Zn}^{2+}, \mathrm{Ca}^{2+}, \mathrm{Fe}^{3+}, \mathrm{Ni}^{2+}, \mathrm{Ba}^{2+}$ and $\mathrm{Cu}^{2+}$ was added conc. HCl...

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The molar solubility of $\mathrm{Zn}(\mathrm{OH})_2$ in 0.1 M NaOH solution is $x \times 10^{-18} \mathrm{M}$. The value of $x$ is...

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Q JEE MAIN 2021

Deuterium resembles hydrogen in properties but :

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The number of atoms in 8 g of sodium is $x \times 10^{23}$. The value of x is________.(Nearest integer) [Given:...

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Q JEE MAIN 2021

In which one of the following molecules strongest back donation of an electron pair from halide to boron is expected?

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The sum of oxidation states of two silver ions in $\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right]\left[\mathrm{Ag}(\mathrm{CN})_2\right]$ complex is _______.

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An empty LPG cylinder weighs 14.8 kg. When full, it weighs 29.0 kg and shows a pressure of 3.47 atm....

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Q JEE MAIN 2021

Match List–I with List–II : Choose the most appropriate answer from the options given below :

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For thel reaction $2 \mathrm{NO}_2(\mathrm{~g}) \rightleftharpoons \mathrm{N}_2 \mathrm{O}_4(\mathrm{~g})$, when $\Delta \mathrm{S}=-176.0 \mathrm{JK}^{-1}$ and $\Delta \mathrm{H}=-57.8 \mathrm{~kJ} \mathrm{~mol}^{-1}$, the magnitude of...

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The molar solubility of $\mathrm{Zn}(\mathrm{OH})_2$ in 0.1 M NaOH solution is $x \times 10^{-18} \mathrm{M}$. The value of $x$ is...

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An empty LPG cylinder weighs 14.8 kg. When full, it weighs 29.0 kg and shows a pressure of 3.47 atm....

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Q JEE MAIN 2021

The structure of the starting compound P used in the reaction given below is :

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The number of halogen/(s) forming halic (V) acid is __________.

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Identify the element for which electronic configuration in +3 oxidation state is $[\mathrm{Ar}] 3 \mathrm{~d}^5$ :

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Q JEE MAIN 2021

Identify the element for which electronic configuration in +3 oxidation state is $[\mathrm{Ar}] 3 \mathrm{~d}^5:$

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Number of paramagnetic oxides among the following given oxides is __________. $\mathrm{Li}_2 \mathrm{O}, \mathrm{CaO}, \mathrm{Na}_2 \mathrm{O}_2, \mathrm{KO}_2, \mathrm{MgO}$ and $...

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Number of paramagnetic oxides among the following given oxides is $\_\_\_\_$ $\mathrm{Li}_2 \mathrm{O}, \quad \mathrm{CaO}, \quad \mathrm{Na}_2 \mathrm{O}_2, \quad \mathrm{KO}_2$,...

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Q JEE MAIN 2021

In the following sequence of reactions, the final product D is :

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The oxide without nitrogen-nitrogen bond is :

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The potassium ferrocyanide solution gives a Prussian blue colour, when added to :

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Which one of the following gives the most stable Diazonium salt

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Q JEE MAIN 2021

The potassium ferrocyanide solution gives a Prussian blue colour, when added to

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Given below are two statements : Statement I : The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or...

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The compounds B and C respectively are :

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Hydrogen peroxide reacts with iodine in basic medium to give :

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The stereoisomers that are formed by electrophilic addition of bromine to trans-but-2-ene is/are :

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Which one of the following compounds is aromatic in nature ?

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Monomer units of Dacron polymer are :

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Which one of the following gives the most stable Diazonium salt ?

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$\mathrm{A}_3 \mathrm{~B}_2$ is a sparingly soluble salt of molar mass $\mathrm{M}\left(\mathrm{g} \mathrm{mol}^{-1}\right)$ and solubility $\times \mathrm{g} \mathrm{L}^{-1}$. The solubility product...

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$\mathrm{Ge}(\mathrm{Z}=32)$ in its ground state electronic configuration has x completely filled orbitals with $\mathrm{m}_{\mathrm{I}}=0$. The value of $x$ is $\_\_\_\_$...

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According to the following figure, the magnitude of the enthalpy change of the reaction $\mathrm{A}+\mathrm{B} \rightarrow \mathrm{M}+\mathrm{N}$ in $\mathrm{kJ} \mathrm{mol}^{-1}$...

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Q JEE MAIN 2021

The number of hydrogen bonded water molecule(s) associated with stoichiometry $\mathrm{CuSO}_4 .5 \mathrm{H}_2 \mathrm{O}$ is $\_\_\_\_$ .

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Q JEE MAIN 2021

For a first order reaction, the ratio of the time for 75% completion of a reaction to the time for...

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Q JEE MAIN 2021

Q.15 Given below are two statements : Statement I : The nucleophilic addition of sodium hydrogen sulphite to an aldehyde...

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The total number of reagents from those given below, that can convert nitrobenzene into aniline is ______. (Integer answer)

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Consider the sulphides $\mathrm{HgS}, \mathrm{PbS}, \mathrm{CuS}, \mathrm{Sb} 2 \mathrm{~S}_3, \mathrm{As}_2 \mathrm{~S}_3$ and CdS . Number of these sulphides soluble in...

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Q JEE MAIN 2021

In the following sequence of reactions,

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The Crystal Field Stabilization Energy (CFSE) and magnetic moment (spin-only) of an octahedral aqua complex of a metal ion (...

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The molarity of the solution prepared by dissolving 6.3 g of oxalic acid $\left(\mathrm{H}_2 \mathrm{C}_2 \mathrm{O}_4 .2 \mathrm{H}_2 \mathrm{O}\right)$ in...

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Q JEE MAIN 2019

In the following compounds, the decreasing order of basic strength will be

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Q JEE MAIN 2021

Hydrogen peroxide reacts with iodine in basic medium to give :

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Q JEE MAIN 2021

Consider the following cell reaction : $\mathrm{Cd}_{(\mathrm{s})}+\mathrm{Hg}_2 \mathrm{SO}_{4(\mathrm{~s})}+\frac{9}{5} \mathrm{H}_2 \mathrm{O}_{(\mathrm{i})} \rightleftharpoons \mathrm{CdSO}_4 \cdot \frac{9}{5} \mathrm{H}_2 \mathrm{O}_{(\mathrm{s})}+2 \mathrm{Hg}_{(\mathrm{i})}$ The value of...

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Q JEE MAIN 2021

Match List – I with List - II.

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An organic compound neither reacts with neutral ferric chloride solution nor with Fehling solution. It however, reacts with Grignard reagent...

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In the following sequence of reactions a compound A , (molecular formula $\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_2$ ) with a straight chain...

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Q JEE MAIN 2021

The structure of product C, formed by the following sequence of reactions is : $...

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Q JEE MAIN 2021

The stereoisomers that are formed by electrophilic addition of bromine to trans-but-2-ene is/are :

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Q JEE-MAIN 2021

Identify A in the following reaction

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Assertion : Ozone is destroyed by CFCs in the upper stratosphere. Reason : Ozone holes increase the amount of UV...

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Which one of the following given graphs represents the variation of rate constant (k) with temperature (T) for an endothermic...

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In the given chemical reaction, colors of the $\mathrm{Fe}^{2+}$ and $\mathrm{Fe}^{3+}$ ions, are respectively $$ 5 \mathrm{Fe}^{2+}+\mathrm{MnO}_4^{-}+8 \mathrm{H}^{+} \rightarrow \mathrm{Mn}^{2+}+4...

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BOD values (in ppm) for clean water (A) and polluted water (B) are expected respectively :

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Q JEE MAIN 2019

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Experimentally reducing a functional group cannot be done by which one of the following reagents ?

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Which one of the following 0.10 M aqueous solutions will exhibit the largest freezing point depression ?

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Q JEE-MAIN 2021

Calamine and Malachite, respectively, are the ores of :

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Given below are two statements ; one is labelled as Assertion (A) and the other is labelled as Reason (R)...

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Which one of the following compounds is aromatic in nature ?

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Water sample is called cleanest on the basis of which one of the BOD values given below

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Which one of the following is the correct PV vs P plot at constant temperature for an ideal gas ?...

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Choose the correct name for compound given below :

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Which of the following amines can be prepared by Gabriel phthalimide reaction?

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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Q JEE MAIN 2021

Monomer units of Dacron polymer are

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The denticity of an organic ligand, biuret is :

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The size of the iso-electronic species $\mathrm{Cl}^{-}, \mathrm{Ar}$ and $\mathrm{Ca}^{2+}$ is affected by

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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Diborane $\left(\mathrm{B}_2 \mathrm{H}_6\right)$ reacts independently with $\mathrm{O}_2$ and $\mathrm{H}_2 \mathrm{O}$ to produce, respectively:

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Given below are two statements : Statement-I : The process of producing syn-gas is called gasification of coal. Statement-II: The...

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The Crystal Field Stabilization Energy (CFSE) and magnetic moment (spin-only) of an octahedral aqua complex of a metal ion $\left(\mathrm{M}^{\mathrm{z}^{+}}\right)$are...

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Monomer of Novolac is :

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The major product formed in the following reaction is :

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Match List – I with List - II.

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100 mL of a water sample contains 0.81 g of calcium bicarbonate and 0.73 g of magnesium bicarbonate. The hardness...

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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Which one of the following lanthanides exhibits +2 oxidation state with diamagnetic nature ? $($ Given Z for $...

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In order to oxidise a mixture of one mole of each of $\mathrm{FeC}_2 \mathrm{O}_4$, $\mathrm{Fe}_2\left(\mathrm{C}_2 \mathrm{O}_4\right)_3$, $\mathrm{FeSO}_4$ and $\mathrm{Fe}_2\left(\mathrm{SO}_4\right)_3$ in...

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Q JEE MAIN 2021

In the following sequence of reactions a compound A , (molecular formula $\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_2$ ) with a straight chain...

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The major products A and B in the following set of reactions are :

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If solubility product of $\mathrm{Zr}_3\left(\mathrm{PO}_4\right)_4$ is denoted by $\mathrm{K}_{\mathrm{sp}}$ and its molar solubility is denoted by S , then which...

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Which one of the following compounds contains $\beta-\mathrm{C}_1-\mathrm{C}_4$ glycosidic linkage?

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Element ‘B’ forms ccp structure and ‘A’ occupies half of the octahedral voids, while oxygen atoms occupy all the tetrahedral...

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Q JEE MAIN 2021

In the structure of the dichromate ion, there is a :

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The major component/ingredient of Portland Cement is :

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An LPG cylinder contains gas at a pressure of 300 kPa at $27^{\circ} \mathrm{C}$. The cylinder can withstand the pressure...

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When 3.00 g of a substance X is dissolved in 100 g of $\mathrm{CCl}_4$, it raises the boiling point by...

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Select the graph that correctly describes the adsorption isotherms at two temperatures $T_1$ and $T_2\left(T_1>T_2\right)$ for a gas : $(x$...

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Q JEE MAIN 2021

Identify A in the following reaction.

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0.8 g of an organic compound was analysed by Kjeldahl's method for the estimation of nitrogen. If the percentage of...

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Q JEE MAIN 2019

The correct order of hydration enthalpies of alkali metal ions is

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Q JEE MAIN 2021

The correct order of reactivity of the given chlorides with acetate in acetic acid is :

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Assuming that $\mathrm{Ba}(\mathrm{OH})_2$ is completely ionised in aqueous solution under the given conditions the concentration of $\mathrm{H}_3 \mathrm{O}^{+}$ions in 0.005...

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The lanthanide ion that would show color is

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Which one of the following given graphs represents the variation of rate constant (k) with temperature (T) for an endothermic...

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At $20^{\circ} \mathrm{C}$, the vapour pressure of benzene is 70 torr and that of methyl benzene is 20 torr. The...

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Q JEE MAIN 2021

The number of significant figures in 0.00340 is ______ .

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An average person needs about 10000 kJ energy per day. The amount of glucose (molar mass $=180.0 \mathrm{~g} \mathrm{~mol}^{-1}$ )...

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For a chemical reaction $\mathrm{A} \rightarrow \mathrm{B}$, it was found that concentration of B is increased by $0.2 \mathrm{~mol} \mathrm{~L}^{-1}$...

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For silver, $\mathrm{C}_{\mathrm{D}}\left(\mathrm{JK}^{-1} \mathrm{~mol}^{-1}\right)=23+0.01 \mathrm{~T}$. If the temperature (T) of 3 moles of silver is raised from 300 K to...

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Q JEE MAIN 2021

Experimentally reducing a functional group cannot be done by which one of the following reagents ?

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Consider the above chemical reaction. The total number of stereoisomers possible for Product 'P' is _______ .

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The inactivation rate of a viral preparation is proportional to the amount of virus. In the first minute after preparation,...

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Number of electrons present in 4 f orbital of $\mathrm{Ho}^{3+}$ ion is $\_\_\_\_$ (Given Atomic No. of $\mathrm{Ho}=67$ )

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Clean water could have BOD value of less than 5 ppm whereas highly polluted water could have a BOD value...

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To synthesise 1.0 mole of 2-methylpropan-2-ol from Ethylethanoate $\_\_\_\_$ equivalents of $\mathrm{CH}_3 \mathrm{MgBr}$ reagent will be required. (Integer value)

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An accelerated electron has a speed of $5 \times 10^6 \mathrm{~ms}^{-1}$ with an uncertainty of $0.02 \%$. The uncertainty in...

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The vapour pressures of pure liquids A and B are 400 and 600 mmHg, respectively at 298 K. On mixing...

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Q JEE MAIN 2021

The number of nitrogen atoms in a semicarbazone molecule of acetone is _________.

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$2 \mathrm{SO}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{SO}_3(\mathrm{~g})$ In an equilibrium mixture, the partial pressures are $\mathrm{P}_{\mathrm{SO}_3}=43 \mathrm{kPa} ; \mathrm{Po}_{\mathrm{O}_2}=530 \mathrm{~Pa}$ and $...

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A system does 200 J of work and at the same time absorbs 150 J of heat. The magnitude of...

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Maltose on treatment with dilute HCl gives

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Which among the following is the strongest acid ?

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The spin-only magnetic moment value for the complex $\left[\mathrm{Co}(\mathrm{CN})_6\right]^{4-}$ is $\_\_\_\_$ BM. [At. no. of $\mathrm{Co}=27$ ]

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Q JEE MAIN 2021

Water sample is called cleanest on the basis of which one of the BOD values given below

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Identify the process in which change in the oxidation state is five :

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Coupling of benzene diazonium chloride with 1-naphthol in alkaline medium will give

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The Azimuthal quantum number for the valence electrons of Ga+ ion is _______. (Atomic number of Ga = 31)

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What is the major product "P" of the following reaction ?

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250 mL of 0.5 M NaOH was added to 500 mL of 1 M HCl . The number of unreacted...

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Given that $\mathrm{E}_{\mathrm{O}_2 / \mathrm{H}_2 \mathrm{O}}^{\ominus}=+1.23 \mathrm{~V}$; $$ \begin{aligned} & \mathrm{E}_{\mathrm{S}_2 \mathrm{O}_8^{2-} / \mathrm{SO}_4^{2-}}^{\odot}=2.05 \mathrm{~V} \\ & \mathrm{E}_{\mathrm{Br}_2 / \mathrm{Br}^{-}}^{\odot}=+1.09...

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Q JEE MAIN 2021

The number of lone pairs of electrons on the central I atom in $\mathrm{I}_3^{-}$is $\_\_\_\_$ .

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Match List I with List II : Choose the most appropriate answer from the options given below

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For above chemical reactions, identify the correct statement from the following:

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[where $\mathrm{Et} \Rightarrow-\mathrm{C}_2 \mathrm{H}_5{ }^{\mathrm{t}} \mathrm{Bu} \Rightarrow\left(\mathrm{CH}_3\right)_3 \mathrm{C}-$ ] Consider the above reaction sequence, Product "A" and Product "B" formed...

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Which among the above compound/s does/do not form Silver mirror when treated with Tollen's reagent?

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Given below are two statements : Statement I : Chlorofluoro carbons breakdown by radiation in the visible energy region and...

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Maleic anhydride Maleic anhydride can be prepared by :

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Identify the incorrect statement from the following

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Which one of the following metals forms interstitial hydride easily ?

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Identify the species having one $\pi$-bond and maximum number of canonical forms from the following :

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Which one of the following is correct structure for cytosine ?

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The spin only magnetic moments (in BM ) for free $\mathrm{Ti}^{3+}, \mathrm{V}^{2+}$ and $\mathrm{Sc}^{3+}$ ions respectively are (At.No. Sc :...

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A reaction of benzonitrile with one equivalent $\mathrm{CH}_3 \mathrm{MgBr}$ followed by hydrolysis produces a yellow liquid " P ". The...

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Q JEE MAIN 2021

Consider the above reaction, the Product "P" is :

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The correct decreasing order of densities of the following compounds is :

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The ionic radii of $\mathrm{F}^{-}$and $\mathrm{O}^{2-}$ respectively are $1.33 \AA$ and $1.4 \AA$, while the covalent radius of N is...

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Q JEE MAIN_2021

Given below are two statements: Statement I: $\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-},\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$ and $\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$ are $d^2 \mathrm{sp}^3$ hybridised. Statement Il: $\left[\mathrm{MnCl}_6\right]^{3-}$ and $\left[\mathrm{FeF}_6\right]^{3-}$...

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Given below are two statements Statement I : Hyperconjugation is a permanent effect. Statement II : Hyperconjugation in ethyl cation...

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Q _JEE MAIN_2021

The CORRECT order of first ionisation enthalpy is :

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Given below are two statements one is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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Q JEE MAIN_2021

Match List - I with List II :

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The number of neutrons and electrons, respectively, present in the radioactive isotope of hydrogen is :-

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Consider the above reaction, the major product "P" formed is :-

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Which one of the following set of elements can be detected using sodium fusion extract ?

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Value of KP for the equilibrium reaction $\mathrm{N}_2 \mathrm{O}_4(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}_{2(\mathrm{~g})}$ at 288 K is 47.9. The $\mathrm{K}_{\mathrm{C}}$ for...

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Q JEE MAIN 2019

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Assume a cell with the following reaction $\mathrm{Cu}_{(\mathrm{s})}+2 \mathrm{Ag}^{+}\left(1 \times 10^{-3} \mathrm{M}\right) \rightarrow \mathrm{Cu}^{2+}(0.250 \mathrm{M})+2 \mathrm{Ag}_{(\mathrm{s})}$ $\mathrm{E}_{\mathrm{cell}}^{\ominus}=2.97 \mathrm{~V}$ $...

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Q JEE MAIN 2019

Which is wrong with respect to our responsibility as a human being to protect our environment?

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The correct order of the spin-only magnetic moment of metal ions in the following low-spin complexes, $\left[\mathrm{V}(\mathrm{CN})_6\right]^{4-},\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-},\left[\mathrm{Ru}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ and $\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_6\right]^{2+}$, is:

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Methylation of 10 g of benzene gave 9.2 g of toluene. Calculate the percentage yield of toluene ______. (Nearest integer)

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Q JEE MAIN 2019

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The total number of unpaired electrons present in $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_2$ and $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$ is

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The conditions given below are in the context of observing Tyndall effect in colloidal solutions: (A) The diameter of the...

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Compound A is converted to B on reaction with $\mathrm{CHCl}_3$ and KOH . The compound B is toxic and can...

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The metal that can be purified economically by fractional distillation method is:

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Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving...

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In the given reaction 3-Bromo-2, 2 -dimethyl butane $\xrightarrow{\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}} \underset{\text { (Major Product) }}{'} A^{\prime}$ Product $A$ is:

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A s-block element (M) reacts with oxygen to form an oxide of the formula $\mathrm{MO}_2$. The oxide is pale yellow...

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With respect to an ore, Ellingham diagram helps to predict the feasibility of its

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Which one of the following 0.06 M aqueous solutions has lowest freezing point ?

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Match List I with List II : (Both having metallurgical terms) Choose the correct answer from the options given below...

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Among the given species the Resonance stabilised carbocations are:

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An organic compound A $\left(\mathrm{C}_6 \mathrm{H}_6 \mathrm{O}\right)$ gives dark green colouration with ferric chloride. On treatment with $\mathrm{CHCl}_3$ and KOH,...

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An inorganic Compound ' $X$ ' on treatment with concentrated $\mathrm{H}_2 \mathrm{SO}_4$ produces brown fumes and gives dark brown ring...

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Chemical nature of the nitrogen oxide compound obtained from a reaction of concentrated nitric acid and $\mathrm{P}_4 \mathrm{O}_{10}$ (in $...

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Given below are two statements : One is labelled as Assertion A and other is labelled as Reason R. Assertion...

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Which one of the following metal complexes is most stable?

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Thiamine and pyridoxine are also known respectively as :

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Orlon fibres are made up of :

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Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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The set having ions which are coloured and paramagnetic both is -

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The species given below that does NOT show disproportionation reaction is :

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The set in which compounds have different nature is :

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Match List-I with List-II :

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The correct order of intensity of colors of the compounds is :

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Match List I with List II : Choose the correct answer from the options given below :

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Green chemistry in day–to–day life is in the use of:

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The correct structure of Rhumann's Purple, the compound formed in the reaction of ninhydrin with proteins is :

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According to the valence bond theory the hybridization of central metal atom is $\mathrm{dsp}^2$ for which one of the following...

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Given below are the statements about diborane (a) Diborane is prepared by the oxidation of NaBH4 with I2 (b) Each...

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A biodegradable polyamide can be made from:

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When silver nitrate solution is added to potassium iodide solution then the sol produced is :

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Consider the complete combustion of butane, the amount of butane utilized to produce 72.0 g of water is $...

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When 10 mL of an aqueous solution of $\mathrm{Fe}^{2+}$ ions was titrated in the presence of dil $\mathrm{H}_2 \mathrm{SO}_4$ using...

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Match List-I with List-II : Choose the correct answer from the options given below :

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A home owner uses $4.00 \times 10^3 \mathrm{~m}^3$ of methane $\left(\mathrm{CH}_4\right)$ gas, (assume $\mathrm{CH}_4$ is an ideal gas) in a...

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At 298 K , the enthalpy of fusion of a solid $(\mathrm{X})$ is $2.8 \mathrm{~kJ} \mathrm{~mol}^{-1}$ and the enthalpy of...

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Consider the cell at $25^{\circ} \mathrm{C} \mathrm{Zn}\left|\mathrm{Zn}^{2+}(\mathrm{aq}),(1 \mathrm{M}) \| \mathrm{Fe}^{3+}(\mathrm{aq}), \mathrm{Fe}^{2+}(\mathrm{aq})\right| \mathrm{Pt}(\mathrm{s})$ The fraction of total iron present as $\mathrm{Fe}^{3+}$...

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In the following the correct bond order sequence is:

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For the reaction $A+B \rightleftharpoons 2 C$ the value of equilibrium constant is 100 at 298 K . If the...

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Isotope(s) of hydrogen which emits low energy $\beta^{-}$ particles with $t_{1 / 2}$ value > 12 years is/are

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$\mathrm{CO}_2$ gas is bubbled through water during a soft drink manufacturing process at 298 K . If $\mathrm{CO}_2$ exerts a...

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A source of monochromatic radiation of wavelength 400 nm provides 1000 J of energy in 10 seconds. When this radiation...

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Match List-I with List-II Choose the correct answer from the options given below :

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Three moles of AgCl get precipitated when one mole of an octahedral co-ordination compound with empirical formula $...

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Potassium chlorate is prepared by electrolysis of KCl in basic solution as shown by following equation. $...

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The number of sigma bonds in is ................

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An aqueous solution of $\mathrm{NiCl}_2$ was heated with excess sodium cyanide in presence of strong oxidizing agent to form $\left[\mathrm{Ni}(\mathrm{CN})_6\right]^{2-}$....

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An organic compound ' A ' $\mathrm{C}_4 \mathrm{H}_8$ on treatment with $\mathrm{KMnO}_4 / \mathrm{H}^{+}$yields compound $...

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Diamond has a three dimensional structure of C atoms formed by covalent bonds. The structure of diamond has face centred...

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Which of the following compounds does not exhibit resonance?

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Which of the following compounds will provide a tertiary alcohol on reaction with excess of CH3MgBr followed by hydrolysis?

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In the leaching of alumina from bauxite, the ore expected to leach out in the process by reacting with NaOH...

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Which one of the following compounds will liberate $\mathrm{CO}_2$, when treated with $\mathrm{NaHCO}_3$ ?

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When 0.15 g of an organic compound was analyzed using Carius method for estimation of bromine, 0.2397 g of AgBr...

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Which one of the following chemical agent is not being used for dry–cleaning of clothes?

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4 g equimolar mixture of NaOH and $\mathrm{Na}_2 \mathrm{CO}_3$ contains x g of NaOH and y g of $\mathrm{Na}_2 \mathrm{CO}_3$....

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The correct order of following 3d metal oxides, according to their oxidation numbers is : (a) $\mathrm{CrO}_3$ (b) $\mathrm{Fe}_2 \mathrm{O}_3$...

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The vapour pressures of $A$ and $B$ at $25^{\circ} \mathrm{C}$ are 90 mm Hg and 15 mm Hg respectively. If...

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Which purification technique is used for high boiling organic liquid compound (decomposes near its boiling point)?

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Given below are two statements : Srtatement II : Solubility of alkaline earth metal hydroxides in water increases down the...

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Which one of the following statements for D.I. Mendeleeff, is incorrect?

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The wavelength of electrons accelerated from rest through a potential difference of 40 kV is $x \times 10^{-12} \mathrm{~m}$. The...

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The water having more dissolved O2 is :

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For a given chemical reaction $\mathrm{A} \rightarrow \mathrm{B}$ at 300 K the free energy change is $-49.4 \mathrm{~kJ} \mathrm{~mol}^{-1}$ and...

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Which one among the following resonating structures is not correct?

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Which one of the following compounds of Group–14 elements is not known?

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The ionic radii of $\mathrm{K}^{+}, \mathrm{Na}^{+}, \mathrm{Al}^{3+}$ and $\mathrm{Mg2}^{+}$are in the order :

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The correct order of their reactivity towards hydrolysis at room temperature is :

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Which one of the products of the following reactions does not react with Hinsberg reagent to form sulphonamide?

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For the following graphs, Choose from the options given below, the correct one regarding order of reaction is :

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Which one of the following gases is reported to retard photosynthesis ?

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Given below are two statements, one is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (R)...

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In Carius method, halogen containing organic compound is heated with fuming nitric acid in the presence of :

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$\mathrm{Cu}^{2+}$ salt reacts with potassium iodide to give

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The given reaction can occur in the presence of : Choose the correct answer from the options given below :

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Major product P of above reaction, is

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Consider the above reaction, compound B is :

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Consider the given reaction, the product 'X' is:

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At 298.2 K the relationship between enthalpy of bond dissociation (in $\mathrm{kJ} \mathrm{mol}^{-1}$ ) for hydrogen (EH) and its isotope,...

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Benzene on nitration gives nitrobenzene in presence of $\mathrm{HNO}_3$ and $\mathrm{H}_2 \mathrm{SO}$ mixture, where

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The water soluble protein is :

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Sodium stearate $\mathrm{CH}_3\left(\mathrm{CH}_2\right)_{16} \mathrm{COO}^{-} \mathrm{Na}^{+}$is an anionic surfactant which forms micelles in oil. Choose the correct statement for it from...

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Bakelite is a cross-linked polymer of formaldehyde and :

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Consider the above reaction, the major product 'P' is:

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The hybridisations of the atomic orbitals of nitrogen in $\mathrm{NO}_2^{-}, \mathrm{NO}_2^{+}$andN $\mathrm{NH}_4^{+}$respectively are.

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Which one of the following species responds to an external magnetic field?

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is a repeating unit for :

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Which one of the following species doesn't have a magnetic moment of 1.73 BM, (spin only value) ?

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The difference between bond orders of CO and $\mathrm{NO}^{\oplus}$ is $\frac{\mathrm{x}}{2}$ where $\mathrm{x}=$ $\_\_\_\_$ . (Round off to the Nearest...

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$\mathrm{PC}_1 \rightleftharpoons \mathrm{PCl}_3+\mathrm{Cl}_3 \mathrm{~K}_{\mathrm{c}}=1.844$ 3.0 moles of $\mathrm{PCl}_5$ is introduced in a 1 L closed reaction vessel at 380 K...

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Spin only magnetic moment of an octahedral complex of $\mathrm{Fe}^{2+}$ in the presence of a strong field ligand in BM...

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For water at $100^{\circ} \mathrm{C}$ and $1 \mathrm{bar}, \Delta_{\text {vap }} \mathrm{H}-\Delta_{\text {vap }} \mathrm{U}=$ $\_\_\_\_$ $\times 10^2 \mathrm{~J} \mathrm{~mol}^{-1}$....

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Metallic sodium does not react normally with :

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In gaseous triethyl amine the "–C–N–C–" bond angle is ________ degree.

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Outermost electronic configuration of a group 13 element, E , is $4 \mathrm{~s}^2, 4 \mathrm{p}^1$. The electronic configuration of an...

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The number of geometrical isomers possible in triamminetrinitrocobalt (III) is X and in trioxalatochromate (III) is Y. Then the value...

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An organic compound is subjected to chlorination to get compound A using 5.0 g of chlorine. When 0.5 g of...

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1.46 g of a biopolymer dissolved in a 100 mL water at 300 K exerted an osmotic pressure of $...

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A solution is 0.1 M in $\mathrm{Cl}^{-}$and 0.001 M in $\mathrm{CrO}_4^{-2}$. Solid $\mathrm{AgNO}_3$ is gradually added to it Assuming that...

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The conductivity of a weak acid HA of concentration $0.001 \mathrm{~mol} \mathrm{~L}^{-1}$ is $2.0 \times 10^{-5} \mathrm{~S} \mathrm{~cm}^{-1}$. If $...

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$\mathrm{CO}_2$ gas adsorbs on charcoal following Freundlich adsorption isotherm. For a given amount of charcoal, the mass of $\mathrm{CO}_2$ adsorbed...

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Consider two chemical reactions (A) and (B) that take place during metallurgical process : (A) $\mathrm{ZnCO}_{3(\mathrm{~s})} \xrightarrow{\Delta} \mathrm{ZnO}_{(\mathrm{s})}+\mathrm{CO}_{2(\mathrm{~g})}$ (B) $...

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The density of NaOH solution is $1.2 \mathrm{~g} \mathrm{~cm}^{-3}$. The molality of this solution is $\_\_\_\_$ m. (Round off to...

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Given below are two statements : One is labelled as Assertion A and the other labelled as Reason R. Assertion...

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The single largest industrial application of dihydrogen is :

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The correct order of stability of given carbocation is :

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The major product (P) in the following reaction is :

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Match List - I with List - II : Choose the most appropriate answer from the options given below

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In the above reactions, product A and product B respectively are :

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Staggered and eclipsed conformers of ethane are :

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Which one of the following pairs of isomers is an example of metamerism ?

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The compound 'A' is a complementary base of __________ in DNA stands.

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Consider the above reaction and identify the Product P :

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The statement that is INCORRECT about Ellingham diagram is

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Match List-I with List-II : Choose the most appropriate match :

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Which one among the following chemical tests is used to distinguish monosaccharide from disaccharide ?

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Presence of which reagent will affect the reversibility of the following reaction, and change it to a irreversible reaction :

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Given below are two statements : Statement I : Rutherford's gold foil experiment cannot explain the line spectrum of hydrogen...

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Which one of the following statements is NOT correct ?

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The number of geometrical isomers found in the metal complexes $\left[\mathrm{PtCl}_2\left(\mathrm{NH}_3\right)_2\right],\left[\mathrm{Ni}(\mathrm{CO})_4\right],\left[\mathrm{Ru}\left(\mathrm{H}_2 \mathrm{O}\right)_3 \mathrm{Cl}_3\right]$ and $\left[\mathrm{CoCl}_2\left(\mathrm{NH}_3\right)_4\right]^{+}$respectively, are :

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The type of hybridisation and magnetic property of the complex $\left[\mathrm{MnCl}_6\right]^{3-}$, respectively, are :

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Given below are two statements : Statement I : Aniline is less basic than acetamide. Statement II : In aniline,...

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For a reaction of order n, the unit of the rate constant is :

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The oxidation states of ' $\mathrm{P}^{\prime}$ in $\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_7, \mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_5$ and $\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_6$, respectively, are :

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The parameters of the unit cell of a substance are $a=2.5, b=3.0, c=4.0, \alpha=90^{\circ}, \beta=120^{\circ} \gamma=90^{\circ}$. The crystal system of...

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The product obtained from the electrolytic oxidation of acidified sulphate solutions, is :

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Which one of the following compounds will give orange precipitate when treated with 2,4-dinitrophenyl hydrazine ?

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The statement that is INCORRECT about the interstitial compounds is

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The percentage composition of carbon by mole in methane is

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The major product obtained in the following reaction is

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The maximum prescribed concentration of copper in drinking water is :

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For a reaction scheme $A \xrightarrow{k_1} B \xrightarrow{k_2} C$, if the rate of formation of $B$ is set to be...

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Among the following molecules/ions, $$ \mathrm{C}_2^{2-}, \mathrm{N}_2^{2-}, \mathrm{O}_2^{2-}, \mathrm{O}_2 $$ Which one is diamagnetic and has the shortest bond length?

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Fructose and glucose can be distinguished by:

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If $p$ is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having...

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For the solution of the gases $w, x, y$ and $z$ in water at $298 K$, the Henrys law constants...

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Which of the following compounds will show the maximum ‘enol’ content?

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Calculate the standard cell potential (in V) of the cell in which following reaction takes place : $$ \mathrm{Fe}^{2+}(\mathrm{aq})+\mathrm{Ag}^{+}(\mathrm{aq}) \rightarrow...

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The ion that has sp3d2 hybridization for the central atom, is :

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The calculated spin-only magnetic moments (BM) of the anionic and cationic species of $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]_2$ and $\left[\mathrm{Fe}(\mathrm{CN})_6\right]$, respectively, are:

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5 moles of an ideal gas at 100 K are allowed to undergo reversible compression till its temperature becomes 200...

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The IUPAC symbol for the element with atomic number 119 would be :

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Polysubstitution is a major drawback in :

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The covalent alkaline earth metal halide (X = Cl, Br, I) is

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The strength of 11.2 volume solution of $\mathrm{H}_2 \mathrm{O}_2$ is [Given that molar mass of $\mathrm{H}=1 \mathrm{~g} \mathrm{~mol}^{-1}$ and $...

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Which one of the following alkenes when treated with HCl yields majorly an anti Markovnikov product ?

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The structure of Nylon-6 is

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The compound that inhibits the growth of tumors is

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Consider the bcc unit cells of the solids 1 and 2 with the position of atoms as shown below. The...

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The correct statement about $\mathrm{ICl}_5$ and $\mathrm{ICl}_4^{-}$is :

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The Mond process is used for the :

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0.27 g of a long chain fatty acid was dissolved in $100 \mathrm{~cm}^3$ of hexane. 10 mL of this solution...

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Consider the reaction. The percentage yield of amide product is _______. (Round off to the Nearest Integer). (Given : Atomic...

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Q JEE-MAIN 2021

Consider the reaction $\mathrm{N}_2 \mathrm{O}_4(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}_2(\mathrm{~g})$. The temperature at which $\mathrm{KC}=20.4$ and $\mathrm{K}_{\mathrm{P}}=600.1$, is $\_\_\_\_$ K. (Round off...

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KBr is doped with $10^{-5}$ mole percent of $\mathrm{SrBr}_2$. The number of cationic vacancies in 1 g of KBr crystal...

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The number of chlorine atoms in 20 mL of chlorine gas at STP is_____$10^2$. (Round off to the Nearest Integer)....

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In the ground state of atomic Fe(Z = 26), the spin-only magnetic moment is ______ × $10^{-1}$ BM. (Round off...

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A 1 molal $\mathrm{K}_4 \mathrm{Fe}(\mathrm{CN})_6$ solution has a degree of dissociation of 0.4 . Its boiling point is equal to...

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Q JEE-MAIN 2021

The total number of C–C sigma bond/s in mesityl oxide $\left(\mathrm{C}_6 \mathrm{H}_{10} \mathrm{O}\right)$ is_____. (Round off to the Nearest Integer).

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The reaction 2A + $\mathrm{B}_2$ 2AB is an elementary reaction. For a certain quantity of reactants, if the volume of...

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On complete reaction of FeCl3 with oxalic acid in aqueous solution containing KOH, resulted in the formation of product A....

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A KCl solution of conductivity $0.14 \mathrm{~S} \mathrm{~m}^{-1}$ shows a resistance of $4.19 \Omega$ in a conductivity cell. If the...

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During which of the following processes, does entropy decrease ?

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Choose the correct statement regarding the formation of carbocations A and B given :-

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Consider the above reaction where 6.1 g of benzoic acid is used to get 7.8 g of m -bromo benzoic...

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10.0 ml of $\mathrm{Na}_2 \mathrm{CO}_3$ solution is titrated against 0.2 M HCI solution. The following titre values were obtained in...

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A solute a dimerizes in water. The boiling point of a 2 molar solution of A is $100.52^{\circ} \mathrm{C}$. The...

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The solubility of $\mathrm{CdSO}_4$ in water is $8.0 \times 10^{-4} \mathrm{~mol} \mathrm{L}^{-1}$. Its solubility in $0.01 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4$ solution...

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Which of the following statement(s) is (are) incorrect reason for eutrophication ? (A) excess usage of fertilisers (B) excess usage...

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In Tollen's test for aldehyde, the overall number of electron(s) transferred to the Tollen's reagent formula $\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right]_{\sim}^{+}$per aldehyde group to...

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For the coagulation of a negative sol, the species below, that has the highest flocculating power is :

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The gas phase reaction $2 \mathrm{~A}(\mathrm{~g}) \rightleftharpoons \mathrm{A}_2(\mathrm{~g})$ at $400 \mathrm{~K}_{\text {has }} \Delta \mathrm{G}^0=+25.2 \mathrm{~kJ} \mathrm{~mol}^{-1}$. The equilibrium constant...

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A xenon compound 'A' upon partial hydrolysis gives $\mathrm{XeO}_2 \mathrm{~F}_2$. The number of lone pair of electrons present in compound...

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The number of species below that have two lone pairs of electrons in their central atom is $\_\_\_\_$ (Round off...

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The molar conductivities at infinite dilution of barium chloride, sulphuric arid and hydrochloric acid are 280,860 and $426 \mathrm{Scm}^2 \mathrm{~mol}^{-1}$...

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A reaction has a half life of 1 min. The time required for 99.9% completion of the reaction is ______...

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A hard substance melts at high temperature and is an insulator in both solid and in molten state. This solid...

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The unit cell of copper corresponds to a face centered cube of edge length $3.596 A $ with one copper...

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In the following molecules, Hybridisation of carbon a, b and c respectively are :

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Match list-I with list-II : Choose the most appropriate answer from the option given below :

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Copper reduces $\mathrm{NO}_3^{-}$into NO and $\mathrm{NO}_2$ depending upon the concentration of $\mathrm{HNO}_3$ in solution. (Assuming fixed $\left[\mathrm{Cu}^{2+}\right]$ and $\mathrm{P}_{\mathrm{NO}}=\mathrm{P}_{\mathrm{NO} 2}$...

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Given below are two statements : Statement I : Non-biodegradable wastes are generated by the thermal power plants. Statement II...

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Match list-I with list-II : Choose the most appropriate answer the option given below :

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(A) "X" and "Y" respectively are :

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Consider the above reaction, the product 'X' and 'Y' respectively are :

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Match List - I with List - II :

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One of the by-products formed during the recovery of NH3 from Solvay process is :

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Five moles of an ideal gas at 293 K is expanded isothermally from an initial pressure of 2.1 MPa to...

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In the reactions, the enzyme A and enzyme B respectively are : –

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Amongst the following, the linear species is

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Consider titration of NaOH solution versus 1.25M oxalic acid solution. At the end point following burette readings were obtained.(i) 4.5...

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Nitrogen can be estimated by Kjeldahl's method for which of the following compound ?

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Given below are two statements : Statement-I : 2-methylbutane on oxidation with $\mathrm{KMnO}_4$ gives 2-methylbutan-2-ol. Statement-II : n-alkanes can be...

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Q JEE-MAIN 2021

Match List-I with List-II :

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The charges on the colloidal CdS sol and $\mathrm{TiO}_2$ sol are, respectively :

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Consider the given reaction, percentage yield of :

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The common positive oxidation states for an element with atomic number 24, are :

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Electromagnetic radiation of wavelength 663 nm is just sufficient to ionise the atom of metal A . The ionization energy...

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Given below are two statements : Statement I : Bohr's theory accounts for the stability and line spectrum of Li+...

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Primary, secondary and tertiary amines can be separated using :-

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The secondary valency and the number of hydrogen bonded water molecule(s) in $\mathrm{CuSO}_4 .5 \mathrm{H}_2 \mathrm{O}$, respectively, are :

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Match List-I with List-II :

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The spin only magnetic moment of a divalent ion in aqueous solution (atomic number 29) is _______ BM.

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The first ionization energy of magnesium is smaller as compared to that of elements X and Y, but higher than...

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An organic compound "A" on treatment with benzene sulphonyl chloride gives compound B. B is soluble in dil. NaOH solution....

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Among the following, number of metal/s which can be used as electrodes in the photoelectric cell is _______ (Integer answer)

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Deficiency of vitamin K causes :

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Main Products formed during a reaction of 1-methoxy naphthalene with hydroiodic acid are:

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The set that represents the pair of neutral oxides of nitrogen is :

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The rate constant of a reaction increases by five times on increase in temperature from $27^{\circ} \mathrm{C}$ to $52^{\circ} \mathrm{C}$....

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The oxide that shows magnetic property is :

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The correct pair(s) of the ambident nucleophiles is (are) :

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In the reaction of hypobromite with amide, the carbonyl carbon is lost as :

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Match List-I and List-II :

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The number of compound/s given below which contain/s –COOH group is _______.

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In basic medium, $\mathrm{H}_2 \mathrm{O}_2$ exhibits which of the following reactions? (A) $\mathrm{Mn}^{2+} \rightarrow \mathrm{Mn}^{4+}$ (B) $\mathrm{I}_2 \rightarrow \mathrm{I}^{-}$ (C)...

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The oxidation states of nitrogen in NO, NO2, N2O and $\mathrm{NO}_3^{-}$are in the order of :

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The functional groups that are responsible for the ion-exchange property of cation and anion exchange resins, respectively, are :

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If a compound AB dissociates to the extent of $75 \%$ in an aqueous solution, the molality of the solution...

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The set of elements that differ in mutual relationship from those of the other sets is :

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The major product of the following reaction is

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Aluminium is usually found in +3 oxidation state. In contrast, thallium exists in +1 and +3 oxidation states. This is...

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The anodic half-cell of lead-acid battery is recharged using electricity of 0.05 Faraday. The amount of $\mathrm{PbSO}_4$ electrolyzed in g...

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Arrange the following amines in the decreasing order of basicity

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The pressure exerted by a non-reactive gaseous mixture of 6.4 g of methane and 8.8 g of carbon dioxide in...

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0.5 moles of gas $A$ and $x$ moles of gas $B$ exert a pressure of 200 Pa in a container...

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The oxygen dissolved in water exerts a partial pressure of 20 kPa in the vapour above water. The molar solubility...

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A solution of sodium sulfate contains 92 g of $\mathrm{Na}^{+}$ions per kilogram of water. The molality of $\mathrm{Na}^{+}$ions in that...

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For emission line of atomic hydrogen from $n_i=8 \mid$ to $n_f=n$, the plot of wave number $(\vec{v})$ against $\left(\frac{1}{n^2}\right)$ will...

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15 mL of aqueous solution of $\mathrm{Fe}^{2+}$ in acidic medium completely reacted with 20 mL of 0.03 M aqueous $...

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The standard enthalpies of formation of $\mathrm{Al}_2 \mathrm{O}_3$ and CaO are $-1675 \mathrm{~kJ} \mathrm{~mol}^{-1}$ and $-635 \mathrm{~kJ} \mathrm{~mol}^{-1}$ respectively. For...

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A water sample has ppm level concentration of the following metals: $\mathrm{Fe}=0.2 ; \mathrm{Mn}=5.0 ; \mathrm{Cu}=3.0 ; \mathrm{Zn}=5.0$. The metal...

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The major product of following reaction is

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For a certain first order reaction 32\% of the reactant is left after 570 s . The rate constant of...

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Which one of the following statements regarding Henry's law is not correct?

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The mole fraction of a solute in a 100 molal aqueous solution $\_\_\_\_$ $\times 10^{-2}$. (Round off to the Nearest...

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Major product of the following reaction is

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$\left[\mathrm{Ti}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$ absorbs light of wavelength 498 nm during a $\mathrm{d}-\mathrm{d}$ transition. The octahedral splitting energy for the avove complex...

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In the above reaction, 3.9 g of benzene on nitration gives 4.92 g of nitrobenzene. The percentage yield of nitrobenzene...

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At $25^{\circ} \mathrm{C}, 50 \mathrm{~g}$ of iron reacts with HCl to form $\mathrm{FeCl}_2$. The evolved hydrogen gas expands against a...

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The following results were obtained during kinetic studies of the reaction ; $2 \mathrm{~A}+\mathrm{B} \rightarrow$ Products The time (in minutes)...

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A certain orbital has $\mathrm{n}=4$ and $\mathrm{m}_{\varepsilon}=-3$. The number of radial nodes in this orbital is $\_\_\_\_$ . (Round off...

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The isotopes of hydrogen are

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0.01 moles of a weak acid HA $\left(K_a=2.0 \times 10^{-6}\right)$ is dissolved in 1.0 L of 0.1 M HCl solution....

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The one that is extensively used as a piezoelectric material is

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The reaction of white phosphorus on boiling with alkali in inert atmosphere resulted in the formation of product ' A...

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The compounds A and B in the following reaction are, respectively

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The point of intersection and sudden increase in the slope, in the diagram given below, respectively, indicates :

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The correct decreasing order for acid strength is

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According to molecular orbital theory, which of the following is true with respect to $\mathrm{Li}_2{ }^{+}$and $\mathrm{Li}_2{ }^{-}$?

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Given below are two statements : Statement-I : Retardation factor (Rf) can be measured in meter/centimeter. Statement-II : Rf value...

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The increasing order of pKa of the following amino acids in aqueous solution is Gly, Asp, Lys, Arg

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What is the spin-only magnetic moment value (BM) of a divalent metal ion with atomic number 25, in it's aqueous...

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When 35 mL of 0.15 M lead nitrate solution is mixed with 20 mL of 0.12 M chromic sulphate solution,...

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Sulphurous acid $\left(\mathrm{H}_2 \mathrm{SO}_3\right)$ has $\mathrm{Ka}_1=1.7 \times 10^{-2}$ and $\mathrm{Ka}_2=6.4 \times 10^{-8}$. The pH of $0.588 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_3$ is...

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Assuming ideal behaviour, the magnitude of $\log \mathrm{K}$ for the following reaction at $25^{\circ} \mathrm{C}$ is $\mathrm{x} \times 10^{-1}$. The...

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At 363 K, the vapour pressure of A is 21 kPa and that of B is 18 kPa. One mole...

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The number of orbitals with $\mathrm{n}=5, \mathrm{~m}_1=+2$ is $\_\_\_\_$ . (Round off to the Nearest Integer).

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In Duma's method of estimation of nitrogen, 0.1840 g of an organic compound gave 30 mL of nitrogen collected at...

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1.86 g of aniline completely reacts to form acetanilide. 10\% of the product is lost during purification. Amount of acetanilide...

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A and B decompose via first order kinetics with half-lives 54.0 min and 18.0 min respectively. Starting from an equimolar...

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A $5.0 \mathrm{~m} \mathrm{~mol} \mathrm{dm}^{-3}$ aqueous solution of KCl has a conductance of 0.55 mS when measured in a cell...

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Ga (atomic mass 70 u) crystallizes in a hexagonal close packed structure. The total number of voids in 0.581 g...

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The exact volumes of 1 M NaOH solution required to neutralize 50 mL of $1 \mathrm{M} \mathrm{H}_3 \mathrm{PO}_3$ solution and...

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The correct order of conductivity of ions in water is:

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Adsorption of a gas follows Freundlich adsorption isotherm. In the given plot, $x$ is the mass of the gas adsorbed...

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Which amongst the following is the strongest acid?

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Arrange the following metal complex/compounds in the increasing order of spin only magnetic moment. Presume all the three, high spin...

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The INCORRECT statement(s) about heavy water is (are) (A) used as a moderator in nuclear reactor (B) obtained as a...

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Correct statements among a to d regarding silicones are (a) They are polymers with hydrophobic character (b) They are biocompatible...

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A colloidal system consisting of a gas dispersed in a solid is called a/an :

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The INCORRECT statements below regarding colloidal solutions is :

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Q

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The major product of the following reaction is

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Which of the following reaction is an example of ammonolysis?

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The characteristics of elements X,Y and Z with atomic numbers, respectively, 33, 53 and 83 are :

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Mesityl oxide is a common name of :

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Which of the following is least basic?

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The correct match between Item-I and Item-II is

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An unsaturated hydrocarbon X on ozonolysis gives A. Compound A when warmed with ammonical silver nitrate forms a bright silver...

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Hoffmann bromomide degradation of benzamide gives product A , which upon heating with $\mathrm{CHCl}_3$ and NaOH gives product B ....

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Ammon lysis of Alkyl halides followed by the treatment with Nao solution can be used to prepare primary, secondary and...

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The highest value of the calculated spin only magnetic moment (in BM) among all the transition metal complexes is

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Reducing smog is a mixture of:

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Sucrose hydrolyses in acid solution into glucose and fructose following first order rate law with a half-life of 3.33 h...

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The correct statements about $\mathrm{H}_2 \mathrm{O}_2$ are : (A) used in the treatment of effluents. (B) used as both oxidising...

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Consider the reversible isothermal expansion of an ideal gas in a closed system at two different temperatures T1 and T2...

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The INCORRECT statement regarding the structure of $\mathrm{C}_{60}$ is :

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In general, the properties that decrease and increase down a group in the periodic table, respectively, are

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The magnitude of the change in oxidising power of the $\mathrm{MnO}_4^{-} / \mathrm{Mn}^{2+}$ couple is $\mathrm{x} \times 10^{-4} \mathrm{~V}$, if...

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Statement I : Sodium hydride can be used as an oxidising agent. Statement II : The lone pair of electrons...

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Fructose is an example of :-

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Two complexes $\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_3(\mathrm{~A})$ and $\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_6\right]_3(\mathrm{~B})$ are violet and yellow coloured, respectively. The incorrect statement regarding them is

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$\mathrm{C}_6 \mathrm{H}_6$ freezes at $5.5^{\circ} \mathrm{C}$. The temperature at which a solution 10 g of $\mathrm{C}_4 \mathrm{H}_{10}$ in 200 g...

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Which of the following polymer is used in the manufacture of wood laminates?

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$F_2 x_2$ and $F e y_3$ are known when $x$ and $y$ are :

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The volume occupied by 4.75 g of acetylene gas at 50°C and 740 mmHg pressure is _____ L. (Rounded off...

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The secondary strtucture of protein is stabilised by:

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The formula of a gaseous hydrocarbon which requires 6 times of its own volume of $\mathrm{O}_2$ for complete oxidation and...

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Among the following allotropic forms of sulphur, the number of allotropic forms, which will show paramagnetism is (A) $\alpha$-sulphur (B)...

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Which of the following reduction reaction CANNOT be carried out with coke ?

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The total number of amines among the following which can be synthesized by Gabriel synthesis is

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The correct set from the following in which both pairs are in correct order of melting point is

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The diazonium salt of which of the following compounds will form a coloured dye on reaction with $\beta-$Naphthol in NaOH...

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The green house gas/es is (are) : (A) Carbon dioxide (B) Oxygen (C) Water vapour (D) Methane Choose the most...

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Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R....

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The correct shape and I-I-I bond angles respectively in $\mathrm{I}_3^{-}$ion are :-

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The incorrect statement among the following is :-

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Given below are two statements :- Statement I : The value of the parameter "Biochemical Oxygen Demand (BOD)" is important...

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What is the correct order of the following elements with respect to their density ?

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Which one of the following compounds is nonaromatic

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Match List-I with List-II C hoose the correct answer from the options given below :

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Complete combustion of 3 g of ethane gives $x \times 10^{22}$ molecules of water. The value of $x$ is $\_\_\_\_$...

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For the reaction $2 \mathrm{Fe}^{3+}(\mathrm{aq})+2 \mathrm{I}^{-}(\mathrm{aq}) \rightarrow 2 \mathrm{Fe}^{2+}(\mathrm{aq})+\mathrm{I}_2(\mathrm{~s})$ the magnitude of the standard molar free energy change, $\Delta_{\mathrm{r}} \mathrm{G}_{\mathrm{m}}^0=-$...

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Q JEE MAIN 2021

Match List-I and List-II.

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Q JEE MAIN 2021

2 molal solution of a weak acid HA has a freezing point of $3.885^{\circ} \mathrm{C}$. The degree of dissociation of...

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The total number of unpaired electrons present in the complex $\mathrm{K}_3\left[\mathrm{Cr}(\text { oxalate })_3\right]$ is $\_\_\_\_$ .

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Which of the following reagent is suitable for the preparation of the product in the above reaction ?

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A reaction of 0.1 mole of Benzylamine with bromomethane gave 23 g of Benzyl trimethyl ammonium bromide. The number of...

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$\_\_\_\_$ grams of 3-Hydroxy propanal (MW=74) must be dehydrated to produce 7.8 g of acrolein $(\mathrm{MW}=56)\left(\mathrm{C}_3 \mathrm{H}_4 \mathrm{O}\right)$ if the...

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In polymer Buna-S: 'S' stands for :-

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For the reaction $\mathrm{C}_2 \mathrm{H}_6 \longrightarrow \mathrm{C}_2 \mathrm{H}_4+\mathrm{H}_2$ the reaction enthalpy $\Delta_{\mathrm{r}} \mathrm{H}=$ $\_\_\_\_$ $\mathrm{kJ} \mathrm{mol}^{-1}$. (Round off to the...

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Which one of the following carbonyl compounds cannot be prepared by addition of water on an alkyne in the presence...

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$2 \mathrm{NO}(\mathrm{g})+\mathrm{Cl}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NOCl}(\mathrm{s})$ This reaction was studied at $-10^{\circ} \mathrm{C}$ and the following data was obtained $[\mathrm{NO}]_0$ and...

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Which of the following compound CANNOT act as a Lewis base?

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The absolute value of the electron gain enthalpy of halogens satisfies:

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The above reaction requires which of the following reaction conditions?

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Which of the following is correct structure of tyrosine ?

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Given below are two statements: Statement I : Potassium permanganate on heating at 573 K forms potassium manganate. Statement II...

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A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of...

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n order to prepare a buffer solution of pH 5.74, sodium acetate is added to acetic acid. If the concentration...

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The produce "A" in the above reaction is :

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AX is a covalent diatomic molecule where A and X are second row elements of periodic table. Based on Molecular...

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The chemical that is added to reduce the melting point of the reaction mixture during the extraction of aluminium is...

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Which of the following is an aromatic compound?

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In a binary compound, atoms of element A form a hcp structure and those of element M occupy 2/3 of...

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The number of ionisable hydrogens present in the product obtained from a reaction of phosphorus trichloride and phosphonic acid is:

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With respect to drug-enzyme interaction, identify the wrong statement:

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Match List-I with List-II : Choose the correct answer from the options given below :

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Given below are two statements: One is labelled as Assertion $A$ and the other labelled as reason $R$ Assertion A...

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Match List-I with List-II Choose the most appropriate answer from the options given below –

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Considering the above chemical reaction, identify the product "X" :

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A certain orbital has no angular nodes and two radial nodes. The orbital is :

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The correct structures of trans- $\left[\mathrm{NiBr}_2\left(\mathrm{PPh}_3\right)_2\right]$ and meridonial- $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3\left(\mathrm{NO}_2\right)_3\right]$, respectively, are

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Q JEE MAIN 2021

Compound with molecular formula $\mathrm{C}_3 \mathrm{H}_6 \mathrm{O}$ can show :

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The calculated magnetic moments (spin only value) for species $\left[\mathrm{FeCl}_4\right]^{2-},\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$ and $\mathrm{MnO}_4^{2-}$ respectively are :

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Q JEE MAIN 2021

Match list - I and List - II Choose the correct answer from the options given below :

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Match List-I with List-II Choose the most appropriate answer from the options given below :

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According to Bohr's atomic theory :- (1) Kinetic energy of electron is $\propto \frac{\mathrm{Z}^2}{\mathrm{n}^2}$. (2) The product of velocity (v)...

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Q JEE MAIN 2021

The correct order of the following compounds showing increasing tendency towards nucleophilic substitution reaction is :-

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The statements that are TRUE : (A) Methane leads to both global warming and photochemical smog (B) Methane is generated...

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Match List-I with List-II : List-I (Chemicals) (a) Alcoholic potassium hydroxide (b) $\mathrm{Pd} / \mathrm{BaSO}_4$ (c) BHC (Benzene hexachloride) (d)...

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Most suitable salt which can be used for efficient clotting of blood will be :-

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Match List-I with List-II Choose the most appropriate answer from the options given below :

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Consider the above chemical reaction and identify product "A"

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What is the correct sequence of reagents used for converting nitrobenzene into m-dibromobenzene

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Match the list -I with list – II

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A non-reducing sugar "A" hydrolyses to give two reducing mono saccharides. Sugar A is-

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Reagent, 1-naphthylamine and sulphanilic acid in acetic acid is used for the detection of

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The ionic radius of $\mathrm{Na}+$ ions is 1.02 Å.. The ionic radii (in Å. ) of $\mathrm{Mg}^{2+}$ and $\mathrm{Al}^{3+}$, respectively,...

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Considering the above reaction, X and Y respectively are:

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What is 'X' in the given reaction?

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The major product of the following reaction is: $$ \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}=\mathrm{CH}_2 \xrightarrow[\text { Rh catalyst }]{\mathrm{H}_2 / \mathrm{CO}} $$

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Given below are two statements : Statement 1 : The identification of $\mathrm{Ni}^{2+}$ is carried out by dimethyl glyoxime in...

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Q JEE MAIN 2021

Which one of the following statements is FALSE for hydrophilic sols ?

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Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens?

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In which of the following order the given complex ions are arranged correctly with respect to their decreasing spin only...

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The major components of German Silver are :

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Given below are two statements : Statement I : The pH of rain water is normally ~5.6. Statement II :...

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The pH of ammonium phosphate solution, if $\mathrm{pk}_{\mathrm{a}}$ of phosphoric acid and $\mathrm{pk}_{\mathrm{b}}$ of ammonium hydroxide are 5.23 and 4.75...

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Q JEE MAIN 2021

The correct order of bond dissociation enthalpy of halogens is :

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The number of stereoisomers possible for $\left[\mathrm{Co}(\mathrm{ox})_2(\mathrm{Br})\left(\mathrm{NH}_3\right)\right]^{2-}$ is $\_\_\_\_$ [ox = oxalate]

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In mildly alkaline medium, thiosulphate ion is oxidized by $\mathrm{MnO}_4^{-}$to " A ". The oxidation state of sulphur in "...

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Q JEE MAIN 2021

The correct order of acid character of the following compounds is :

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The number of octahedral voids per lattice site in a lattice is _____.(Rounded off to the nearest integer)

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A ball weighing 10 g is moving with a velocity of $90 \mathrm{~ms}^{-1}$. If the uncertainty in its velocity is...

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The average $\mathrm{S}-\mathrm{F}$ bond energy in $\mathrm{kJ} \mathrm{mol}^{-1}$ of $\mathrm{SF}_6$ is $\_\_\_\_$ (Rounded off to the nearest integer) [Given :...

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When 12.2 g of benzoic acid is dissolved in 100 g of water, the freezing point of solution was found...

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Emf of the following cell at 298 K in V is $\mathrm{x} \times 10^{-2} . \mathrm{Zn}\left|\mathrm{Zn}^{2+}(0.1 \mathrm{M})\right|\left|\mathrm{Ag}^{+}(0.01 \mathrm{M})\right| \mathrm{Ag}$. The...

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The $\mathrm{NaNO}_3$ weighed out to make 50 mL of an aqueous solution containing $70.0 \mathrm{mg} \mathrm{Na}^{+}$per mL is $\_\_\_\_$ g....

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Choose the correct answer from the options given below

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The correct sequence of reagents used in the preparation of 4-bromo-2-nitroethyl benzene from benzene is :

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The nature of charge on resulting colloidal particles when $\mathrm{FeCl}_3$ is added to excess of hot water is :

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The major product of the following reaction is:

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Which of the following is correct structure of α-anomer of maltose ?

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The decomposition of formic acid on gold surface follows first order kinetics. If the rate constant at 300 K is...

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A certain element crystallises in a bcc lattice of unit cell edge length 27 Å. If the same element under...

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Two salts $A_2 X$ and $M X$ have the same value of solubility product of $4.0 \times 10^{-12}$. The ratio...

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Number of bridging CO ligands in $\left[\mathrm{Mn}_2(\mathrm{CO})_{10}\right]$ is $\_\_\_\_$ .

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Identify A in the given reaction.

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When light of wavelength 248 nm falls on a metal of threshold energy 3.0 eV, the de-Broglie wavelength of emitted...

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3.12 g of oxygen is adsorbed on 1.2 g of platinum metal. The volume of oxygen adsorbed per gram of...

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Gaseous cyclobutene isomerizes to butadiene in a first order process which has a ' k ' value of $...

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Q JEE MAIN 2021

considering the above reaction, the major product among the following is :

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224 mL of $\mathrm{SO}_{2(\mathrm{~g})}$ at 298 K and 1 atm is passed through 100 mL of 0.1 M NaOH solution....

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A 6.50 molal solution of KOH (aq.) has a density of $1.89 \mathrm{~g} \mathrm{~cm}^{-3}$. The molarity of the solution is...

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The coordination number of an atom in a bodycentered cubic structure is _______. [Assume that the lattice is made up...

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The equivalents of ethylene diamine required to replace the neutral ligands from the coordination sphere of the trans-complex of $...

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The stepwise formation of $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}$ is given below $...

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Dichromate ion is treated with base, the oxidation number of Cr in the product formed is ______.

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Calgon is used for water treatment. Which of the following statement is NOT true about Calgon?

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$\mathrm{AB}_2$ is $10 \%$ dissociated in water to $\mathrm{A}^{2+}$ and $\mathrm{B}^{-}$. The boiling point of a 10.0 molal aqueous solution...

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A homogeneous ideal gaseous reaction $\mathrm{AB}_{2(\mathrm{~g})} \rightleftharpoons \mathrm{A}_{(\mathrm{g})}+2 \mathrm{~B}_{(\mathrm{g})}$ is carried out in a 25 litre flask at $27^{\circ} \mathrm{C}$....

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A proton and a $\mathrm{Li}^{3+}$ nucleus are accelerated by the same potential. If $\lambda_{\mathrm{Li}}$ and $\lambda_P$ denote the de Broglie...

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Which among the following species has unequal bond lengths ?

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$2 \mathrm{MnO}_4^{-}+\mathrm{bC}_2 \mathrm{O}_4^{2-}+\mathrm{cH}^{+} \rightarrow \mathrm{xMn}^{2+}+\mathrm{yCO}_2+\mathrm{z} \mathrm{H}_2 \mathrm{O}$ If the above equation is balanced with integer coefficients, the value of c...

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Q JEE MAIN 2021

Identify A in the following chemical reaction

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A certain gas obeys $\mathrm{P}\left(\mathrm{V}_{\mathrm{m}}-\mathrm{b}\right)=\mathrm{RT}$. The value of $\left(\frac{\partial \mathrm{Z}}{\partial \mathrm{P}}\right)_{\mathrm{T}}$ is $\frac{\mathrm{xb}}{\mathrm{RT}}$. The value of x is $\_\_\_\_$ ....

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For the reaction $\mathrm{A}_{(\mathrm{g})} \rightarrow(\mathrm{B})_{(\mathrm{g})}$, the value of the equilibrium constant at 300 K and 1 atm is equal to...

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Complete combustion of 750 g of an organic compound provides 420 g of $\mathrm{CO}_2$ and 210 g of $\mathrm{H}_2 \mathrm{O}$....

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Identify A in the given chemical reaction

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An exothermic reaction $X \rightarrow Y$ has an activation energy $30 \mathrm{~kJ} \mathrm{~mol}^{-1}$. If energy change $\Delta \mathrm{E}$ during the...

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The number of significant figures in $50000.020 \times 10^{-3}$ is

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Which pair of oxides is acidic in nature?

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For a chemical reaction $\mathrm{A}+\mathrm{B} \rightleftharpoons \mathrm{C}+\mathrm{D}\left(\Delta_{\mathrm{r}} \mathrm{H}^0=\right. 80 \mathrm{~kJ} \mathrm{~mol}^{-1}$ ) the entropy change $\Delta_{\mathrm{r}} \mathrm{S}^0$ depends on the...

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An amine on reaction with benzenesulphonyl chloride produces a compound insoluble in alkaline solution. This amine can be prepared by...

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Ceric ammonium nitrate and $\mathrm{CHCl}_3$ / alc. KOH are used for the identification of functional groups present in $\_\_\_\_$ and...

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2,4-DNP test can be used to identify :

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A group 15 element, which is a metal and forms a hydride with strongest reducing power among group 15 hydrides....

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Given below are two statements : Statement I: o-Nitrophenol is steam volatile due to intramolecular hydrogen bonding. Statement II: o-Nitrophenol...

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Seliwanoff test and Xanthoproteic test are used for the identification of _____and _____ respectively

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In chromotography technique, the purification of compound is independent of :

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Which one of the following lanthanoids does not form $\mathrm{MO}_2$ ? [ M is lanthanoid metal]

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In $\stackrel{1}{\mathrm{C}} \mathrm{H}_2=\stackrel{2}{\mathrm{C}}=\stackrel{3}{\mathrm{C}} \mathrm{H}-\stackrel{4}{\mathrm{C}} \mathrm{H}_3$ molecule, the hybridization of carbon $1,2,3$ and 4 respectively are:

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Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R...

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Compound A used as a strong oxidizing agent is amphoteric in nature. It is the part of lead storage batteries....

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The reaction of sulphur in alkaline medium is the below: $...

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Match List-I with List-II :

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The correct order of electron gain enthalpy is

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Q JEE MAIN 2022

Number of amphoteric compound among the following is __________

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Which of the following vitamin is helpful in delaying the blood clotting -

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The process that involves the removal of sulphur from the ores is :

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Which of the following is 'a' FALSE statement?

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At 1990 K and 1 atm pressure, there are equal number of $\mathrm{Cl}_2$ molecules and Cl atoms in the reaction...

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Which of the following reaction DOES NOT involve Hoffmann Bromamide degradation ?

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4.5 g of compound $\mathrm{A}(\mathrm{MW}=90)$ was used to make 250 mL of its aqueous solution. The molarity of the solution...

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On treating a compound with warm dil. $\mathrm{H}_2 \mathrm{SO}_4$, gas X is evolved which turns $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ paper acidified...

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Assertion A : Enol form of acetone $\left[\mathrm{CH}_3 \mathrm{COCH}_3\right]$ exists in $

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When 9.45 g of $\mathrm{ClCH}_2 \mathrm{COOH}$ is added to 500 mL of water, its freezing point drops by $0.5^{\circ} \mathrm{C}$....

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The type of pollution that gets increased during the day time and in the presence of $\mathrm{O}_3$ is :

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Which of the following compound gives pink colour on reaction with phthalic anhydride in conc. $\mathrm{H}_2 \mathrm{SO}_4$ followed by treatment...

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Given below are two statements : Statement I : A mixture of chloroform and aniline can be separated by simple...

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Given below are two statements : Statement I: $\mathrm{H}_2 \mathrm{O}_2$ can act as both oxidising and reducing agent in basic...

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Given below are two statements :one is labelled as Assertion A and the other is labelled as Reason R Assertion...

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The product "A" and "B" formed in this reactions are :

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Identify products A and B :

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Which of the following is Lindlar catalyst ?

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The electrode potential of $\mathrm{M}^{2+} / \mathrm{M}$ of 3d-series elements shows positive value of :

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The functions of antihistamine are :

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Which of the following forms of hydrogen emits low energy $\beta^{-}$particles?

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The major components in "Gun Metal" are :

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Given below are two statements : Statement I: The $\mathrm{E}^{\circ}$ value of $\mathrm{Ce}^{4+} / \mathrm{Ce}^{3+}$ is +1.74 V . Statement...

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The gas released during anaerobic degradation of vegetation may lead to :

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In the below chemical reaction, intermediate "X" and reagent/condition "A" are :

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Match List I with List II.

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The orbital having two radial as well as two angular nodes is -

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Out of the following, which type of interaction is responsible for the stabilisation of $\alpha$-helix structure of proteins ?

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Statements about heavy water are given below. A. Heavy water is used in exchange reactions for the study of reaction...

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Given below are two statements : Statement I : Colourless cupric metaborate is reduced to cuprous metaborate in a luminous...

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Among the following, the aromatic compounds are :

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The ionization enthalpy of $\mathrm{Na}^{+}$formation from $\mathrm{Na}_{(\mathrm{g})}$ is $495.8 \mathrm{~kJ} \mathrm{~mol}^{-1}$, while the electron gain enthalpy of Br is $...

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Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R....

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Which of the following reagent is used for the following reaction ?

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Match List-I with List-II :

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What is the major product formed by HI on reaction with

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Consider the following chemical reaction. $...

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0.4 g mixture of $\mathrm{NaOH}, \mathrm{Na}_2 \mathrm{CO}_3$ and some inert impurities was first titrated with $\frac{\mathrm{N}}{10} \mathrm{HCl}$ using phenolphthalein as...

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The product 'P' in the below reaction is :

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The presence of ozone in troposphere

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(A) $\mathrm{HOCl}+\mathrm{H}_2 \mathrm{O}_2 \rightarrow \mathrm{H}_3 \mathrm{O}^{+}+\mathrm{Cl}^{-}+\mathrm{O}_2$ (B) $\mathrm{I}_2+\mathrm{H}_2 \mathrm{O}_2+2 \mathrm{OH}^{-} \rightarrow 2 \mathrm{I}^{-}+2 \mathrm{H}_2 \mathrm{O}+\mathrm{O}_2$ Choose the correct option.

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For the reaction, $\mathrm{aA}+\mathrm{bB} \rightarrow \mathrm{cC}+\mathrm{dD}$, the plot of $\log \mathrm{k}$ vs $\frac{1}{\mathrm{~T}}$ is given below : The temperature at...

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Find $\mathrm{A}, \mathrm{B}$ and C in the following reactions : $$ \begin{aligned} & \mathrm{NH}_3+\mathrm{A}+\mathrm{CO}_2 \rightarrow\left(\mathrm{NH}_4\right)_2 \mathrm{CO}_3 \\ & \left(\mathrm{NH}_4\right)_2 \mathrm{CO}_3+\mathrm{H}_2...

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Given below are two statements : Statement I: Both $\mathrm{CaCl}_2 .6 \mathrm{H}_2 \mathrm{O}$ and $\mathrm{MgCl}_2 .8 \mathrm{H}_2 \mathrm{O}$ undergo dehydration...

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Q JEE MAIN 2021

In Freundlich adsorption isotherm, slope of AB line is:

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Using the provided information in the following paper chromatogram : the calculate $\mathrm{R}_{\mathrm{f}}$ value of A $\_\_\_\_$ $\times 10^{-1}$.

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Which among the following pairs of Vitamins is stored in our body relatively for longer duration ?

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The structure of Neoprene is –

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In the following reaction the reason why meta-nitro product also formed is :

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Given below are two statement: one is labelled as Assertion A and the other is labelled as Reason R ;...

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What is the final product (major) 'A' in the given reaction ?

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Which of the following are isostructural pairs ? $\mathrm{SO}_4^{2-}$ and $\mathrm{CrO}_4^{2-}$ $\mathrm{SiCl}_4$ and $\mathrm{TiCl}_4$ $\mathrm{NH}_3$ and $\mathrm{NO}_3^{-}$ $\mathrm{BCl}_3$ and $\mathrm{BrCl}_3$

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$\mathrm{Al}_2 \mathrm{O}_3$ was leached with alkali to get $X$. The solution of $X$ on passing of gas $Y$, forms $...

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The reaction of cyanamide, $\mathrm{NH}_2 \mathrm{CN}_{(\mathrm{s})}$ with oxygen was run in a bomb calorimeter and $\Delta \mathrm{U}$ was found to...

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Which of the following ore is concentrated using group 1 cyanide salt ?

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A car tyre is filled with nitrogen gas at 35 psi at $27^{\circ} \mathrm{C}$. It will burst if pressure exceeds...

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'A' and 'B' in the following reactions are :

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In basic medium $\mathrm{CrO}_4^{2-}$ oxidises $\mathrm{S}_2 \mathrm{O}_3^{2-}$ to form $\mathrm{SO}_4^{2-}$ and itself changes into $\mathrm{Cr}(\mathrm{OH})_4^{-}$. The volume of 0.154 M...

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1 molal aqueous solution of an electrolyte $A_2 B_3$ is $60 \%$ ionised. The boiling point of the solution at...

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Consider the elements Mg. Al, S, P and Si, the correct increasing order of their first ionization enthalpy is :

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Among the following, the number of halide(s) which is/are inert to hydrolysis is _______.

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The product formed in the first step of the reaction of with excess $\mathrm{Mg} / \mathrm{Et}_2 \mathrm{O}\left(\mathrm{Et}=\mathrm{C}_2 \mathrm{H}_5\right)$ is :

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The major product of the following chemical reaction is :

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Which statement is correct ?

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Identify A and B in the chemical reaction.

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In Freundlich adsorption isotherm at moderate pressure, the extent of adsorption $\left(\frac{x}{m}\right)$ is directly proportional to $P^x$. The value of...

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Ellingham diagram is a graphical representation of:

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The hybridization and magnetic nature of $\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{4-}$ and $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$, respectively are:

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Compound(s) which will liberate carbon dioxide with sodium bicarbonate solution is/are:

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Which of the glycosidic linkage between galactose and glucose is present in lactose?

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In which of the following pairs, the outer most electronic configuration will be the same?

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Given below are two statements: Statement I : An allotrope of oxygen is an important intermediate in the formation of...

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The plots of radial distribution functions for various orbitals of hydrogen atom against 'r' are given below:

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The correct statement about $\mathrm{B}_2 \mathrm{H}_6$ is:

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Which one of the following reactions will not form acetaldehyde ?

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Complete combustion of 1.80 g of an oxygen containing compound $\left(\mathrm{C}_x \mathrm{H}_y \mathrm{O}_z\right)$ gave 2.64 g of $\mathrm{CO}_2$ and 1.08...

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Identify A in the given chemical reaction.

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Which of the following equation depicts the oxidizing nature of $\mathrm{H}_2 \mathrm{O}_2$ ?

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Which of the following reaction/s will not give p-aminoazobenzene ?

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According to molecular theory, the species among the following that does not exist is:

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Given below are two statements: Statement I: $\mathrm{CeO}_2$ can be used for oxidation of aldehydes and ketones. Statement 11 :...

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Match List I with List II

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The metal complex that is diamagnetic is (Atomic number : Fe, 26; Cu, 29)

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Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R....

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Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R....

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The products obtained from a reaction of hydrogen peroxide and acidified potassium permanganate are

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The metal that is not extracted from its sulphide ore is :

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The metal that has very low melting point and its periodic position is closer to a metalloid is :

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Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R....

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Class XII students were asked to prepare one litre of buffer solution of pH 8.26 by their chemistry teacher. The...

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The total number of monobromo derivatives formed by the alkanes with molecular formula $\mathrm{C}_5 \mathrm{H}_{12}$ is (excluding stereo isomers).

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Optical activity of an enantiomeric mixture is +12.6° and the specific rotation of (+) isomer is +30°. The optical purity...

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In the titration of $\mathrm{KMnO}_4$ and oxalic acid in acidic medium, the change in oxidation number of carbon at the...

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The separation of two coloured substances was done by paper chromatography. The distances travelled by solvent front, substance A and...

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The conductivity of a solution of complex with formula $\mathrm{CoCl}_3\left(\mathrm{NH}_3\right)_4$ corresponds to $1: 1$ electrolyte, then the primary valency of...

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At 310 K , the solubility of $\mathrm{CaF}_2$ in water is $2.34 \times 10^{-3} \mathrm{~g} / 100 \mathrm{~mL}$. The solubility...

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According to MO theory, number of species/ions from the following having identical bond order is _____:$\mathrm{CN}^{-}, \mathrm{NO}^{+}, \mathrm{O}_2, \mathrm{O}_2^{+}, \mathrm{O}_2^{2+}$

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The number of chlorine atoms in bithionol is ____.

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The molar heat capacity for an ideal gas at constant pressure is $20.785 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}$. The change in internal...

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Amongst the following the number of oxide(s) which are paramagnetic in nature is $...

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20 mL of $0.02 \mathrm{M} \mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ solution is used for the titration of 10 mL of $\mathrm{Fe}^{2+}$ solution...

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The number of stereoisomers formed in a reaction of $( \pm) \mathrm{Ph}(\mathrm{C}=\mathrm{O}) \mathrm{C}(\mathrm{OH})(\mathrm{CN}) \mathrm{Ph}$ with HCN is $\_\_\_\_$ .

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A 1.84 mg sample of polyhydric alcoholic compound ' $X$ ' of molar mass $92.0 \mathrm{~g} / \mathrm{mol}$ gave 1.344...

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A sample of 4.5 mg of an unknown monohydric alcohol, $\mathrm{R}-\mathrm{OH}$ was added to methylmagnesium iodide. A gas is evolved...

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A sugar 'X' dehydrates very slowly under acidic condition to give furfural which on further reaction with resorcinol gives the...

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On complete combustion of 0.492 g of an organic compound containing $\mathrm{C}, \mathrm{H}$ and $\mathrm{O}, 0.7938 \mathrm{~g}$ of $\mathrm{CO}_2$ and...

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Match List I with List II Choose the correct answer from the options given below:

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Consider the following sulphure based oxoacids. $$ \mathrm{H}_2 \mathrm{SO}_3, \mathrm{H}_2 \mathrm{SO}_4, \mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_8 \text { and } \mathrm{H}_2 \mathrm{~S}_2...

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The spin-only magnetic moment value of $\mathrm{M}^{3+}$ ion (in gaseous state) from the pair $\mathrm{Cr}^{3+} / \mathrm{Cr}^{2+}, \mathrm{Mn}^{3+} / \mathrm{Mn}^2$,...

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The sum of number of lone pairs of electrons present on the central atoms of $\mathrm{XeO}_3, \mathrm{XeOF}_4$ and $\mathrm{XeF}_6$ is

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Sum of oxidation state (magnitude) and coordination number of cobalt in $\mathrm{Na}\left[\mathrm{Co}(\mathrm{bpy}) \mathrm{Cl}_4\right]$ is $\_\_\_\_$ .

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Total number of relatively more stable isomer(s) possible for octahedral complex $\left[\mathrm{Cu}(\mathrm{en})_2(\mathrm{SCN})_2\right]$ will be $\_\_\_\_$ .

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The disproportionation of $\mathrm{MnO}_4^{2-}$ in acidic medium resulted in the formation of two manganese compounds A and B . If...

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Assuming $1 \mu \mathrm{~g}$ of trace radioactive element X with a half life of 30 years is absorbed by a...

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The number of interhalogens from the following having square pyramidal structure is : $$ \mathrm{ClF}_3, \mathrm{IF}_7, \mathrm{BrF}_5, \mathrm{BrF}_3, \mathrm{I}_2 \mathrm{Cl}_6,...

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For the given first order reaction $$ A \rightarrow B $$ the half life of the reaction is 0.3010 min...

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For the decomposition of azomethane. $\mathrm{CH}_3 \mathrm{~N}_2 \mathrm{CH}_3(\mathrm{~g}) \rightarrow \mathrm{CH}_3 \mathrm{CH}_3(\mathrm{~g})+\mathrm{N}_2(\mathrm{~g})$ a first order reaction, the variation in partial pressure...

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Match List I with List II Choose the correct answer from the options given below:

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$\mathrm{K}_{\mathrm{a}}$ for butyric acid $\left(\mathrm{C}_3 \mathrm{H}_7 \mathrm{COOH}\right)$ is $2 \times 10^{-5}$. The pH of 0.2 M solution of butyric acid...

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For a cell, $\mathrm{Cu}(\mathrm{s}) \mid \mathrm{Cu}^{2+}\left(0.001 \mathrm{M}| | \mathrm{Ag}^{+}(0.01 \mathrm{M}) \mid \mathrm{Ag}(\mathrm{s})\right.$ the cell potential is found to be 0.43...

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150 g of acetic acid was contaminated with 10.2 g ascorbic acid $\left(\mathrm{C}_6 \mathrm{H}_8 \mathrm{O}_6\right)$ to lower down its freezing...

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The total number of $\mathrm{Mn}=\mathrm{O}$ bonds in $\mathrm{Mn}_2 \mathrm{O}_7$ is $\_\_\_\_$

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The number of paramagnetic species among the following is $\_\_\_\_$ . $\mathrm{B}_2, \mathrm{Li}_2, \mathrm{C}_2, \mathrm{C}_2^{-}, \mathrm{O}_2^{2-}, \mathrm{O}_2^{+} ;$and $\mathrm{He}_2^{+}$

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Given below are two statements: Statement I : Iron (III) catalyst, acidified $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ and neutral $\mathrm{KMnO}_4$ have the...

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1.80 g of solute A was dissolved in $62.5 \mathrm{~cm}^3$ of ethanol and freezing point of the solution was found...

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An element M crystallises in a body centred cubic unit cell with a cell edge of 300 pm . The...

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Which oxoacid of phosphorous has the highest number of oxygen atoms present in its chemical formula?

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In the given reaction, $$ \mathrm{X}+\mathrm{Y}+3 \mathrm{Z} \rightleftarrows \mathrm{XYZ}_3 $$ if one mole of each of $X$ and $Y$ with...

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Consider, $\mathrm{PF}_5, \mathrm{BrF}_5, \mathrm{PCl}_3, \mathrm{SF}_6,\left[\mathrm{ICl}_4\right]^{-}, \mathrm{ClF}_3$ and $\mathrm{IF}_5$. Amongst the above molecule(s)/ion(s), the number of molecule(s)/ion(s) having $\mathrm{sp}^3 \mathrm{~d}^2$ hybridisation...

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Given below are two statements: Statement I : The chlorides of Be and Al have Cl-bridged structure. Both are soluble...

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Given below are two statements: Statement I : Hydrogen peroxide can act as an oxidizing agent in both acidic and...

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A 10 g mixture of hydrogen and helium is contained in a vessel of capacity $0.0125 \mathrm{~m}^3$ at 6 bar...

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While performing a thermodynamics experiment, a student made the following observations, $...

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For kinetic study of the reaction of iodide ion with $\mathrm{H}_2 \mathrm{O}_2$ at room temperature : (A) Always use freshly...

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' x ' g of molecular oxygen $\left(\mathrm{O}_2\right)$ is mixed with 200 g of neon $(\mathrm{Ne})$. The total pressure of...

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Which of the following methods are not used to refine any metal? (A) Liquation (B) Calcination (C) Electrolysis (D) Leaching...

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Consider an imaginary ion ${ }_{22}^{48} \mathrm{X}^{3-}$. The nucleus contains ' a ' $\%$ more neutrons than the number of...

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Statements about Enzyme Inhibitor Drugs are given below : (A) There are Competitive and Non–competitive inhibitor drugs. (B) These can...

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When the excited electron of a H atom from n = 5 drops to the ground state, the maximum number...

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The incorrect statement is

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For the below given cyclic hemiacetal (X), the correct pyranose structure is :

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A sealed flask with a capacity of $2 \mathrm{dm}^3$ contains 11 g of propane gas. The flask is so weak...

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56.0 L of nitrogen gas is mixed with excess of hydrogen gas and it is found that 20 L of...

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Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R....

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A compound ' X ' is a weak acid and it exhibits colour change at pH close to the equivalence...

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Boiling point of a 2% aqueous solution of a non¬volatile solute A is equal to the boiling point of 8%...

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In the given reaction (Where Et is $-\mathrm{C}_2 \mathrm{H}_5$ ) The number of chiral carbon/s in product A is

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$\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$ should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization energy for this...

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Animal starch is the other name of :

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In base vs. Acid titration, at the end point methyl orange is present as

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In bromination of Propyne, with Bromine 1, 1, 2, 2-tetrabromopropane is obtained in 27\% yield. The amount of $1,1,2,2$ tetrabromopropane...

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Identify the correct statement for the below given transformation.

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Vulcanization of rubber is carried out by heating a mixture of :

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The number of $\mathrm{sp}^3$ hybridised carbons in an acyclic neutral compound with molecular formula $\mathrm{C}_4 \mathrm{H}_5 \mathrm{~N}$ is:

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In a linear tetrapeptide (Constituted with different amino acids), (number of amino acids) - (number of peptide bonds) is ______...

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Some drugs bind to a site other than, the active site of an enzyme. This site is known as

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Given below are two statements. One is labeled as Assertion A and the other is labeled as Reason R. Assertion...

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The correct sequential order of the reagents for the given reaction is :

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The reaction between X and Y is first order with respect to X and zero order with respect to Y....

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Given below are two statements. One is labeled as Assertion A and the other is labeled as Reason R. Assertion...

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Glycosidic linkage between $\mathrm{C}_1$ of $\alpha$-glucose and $\mathrm{C}_2$ of $\beta$-fructose is found in

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While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from 0.25 g of the...

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Identify the major product A and B for the below given reaction sequence.

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Given below are two statements. One is labeled as Assertion A and the other is labeled as Reason R. Assertion...

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Consider the above reaction and predict the major product.

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Among the following marked proton of which compound shows lowest $\mathrm{pK}_{\mathrm{a}}$ value ?

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Hydrolysis of which compound will give carbolic acid ?

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Among $\mathrm{Co}^{3+}, \mathrm{Ti}^{2+}, \mathrm{V}^{2+}$ and $\mathrm{Cr}^{2+}$ ions, one if used as a reagent cannot liberate $\mathrm{H}_2$ from dilute mineral acid...

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Given below are two statements. Statement I : $\mathrm{O}_{2, a, \mathrm{Cu}^{2+}}$ and $\mathrm{Fe}^{3+}$ are weakly attracted by magnetic field and...

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If $\mathrm{O}_2$ gas is bubbled through water at 303 K , the number of millimoles of $\mathrm{O}_2$ gas that dissolve...

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Which of the following is not an example of benzenoid compound ?

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Choose the correct option for the following reactions.

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Consider the following metal complexes : $$ \begin{aligned} & {\left[\mathrm{Co}\left(\mathrm{NH}_3\right)\right]^{3+}} \\ & {\left[\mathrm{CoCl}(\mathrm{NH} 3)_5\right]^{2-1}} \\ & {\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-}} \\ & {\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{H}_2...

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When 600 mL of $0.2 \mathrm{M} \mathrm{HNO}_3$ is mixed with 400 mL of 0.1 M NaOH solution in a flask,...

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$ \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CN} \xrightarrow[\text { Efter }]{\mathrm{CH}_2 \mathrm{MgBr}} \mathrm{~A} \xrightarrow{\mathrm{H}_3 \mathrm{O}^{+}} \mathrm{B} \xrightarrow[\mathrm{HCl}]{\mathrm{Zn}-\mathrm{Hg}} \mathrm{C} $ The correct structure of C is

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The correct decreasing order of priority of functional groups in naming an organic compound as per IUPAC system of nomenclature...

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Match List–I with List–II. Choose the correct answer from the options given below :

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The half life for the decomposition of gaseous compound A is 240 s when the gaseous pressure was 500 Torr...

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Arrange the following in decreasing acidic strength.

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Match List I with List II

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The minimum uncertainty in the speed of an electron in an one dimensional region of length $2 a_0$ (Where $\mathbf{a}_0=$...

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The cell potential for $\mathrm{Zn}\left|\mathrm{Zn}^{2+}(a q) \| \mathrm{Sn}^{\mathrm{X}+}\right| \mathrm{Sn}$ is 0.801 V at 298 K . The reaction quotient for...

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What is the major product of the following reaction?

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Ionic radii of cation $\mathrm{A}^{+}$and anion $\mathrm{B}^{\prime \prime}$ are 102 and 181 pm respectively. These ions are allowed to crystallize...

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The Hinsberg reagent is :

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Resistance of a conductivity cell (cell constant $129 \mathrm{~m}^{-1}$ ) filled with 74.5 ppm solution of KCl is $100 \Omega$...

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A compound ' $X$ ' is acidic and it is soluble in NaOH solution, but insoluble in $\mathrm{NaHCO}_3$ solution. Compound...

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Major product of the following reaction is

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The spin only magnetic moment of the complex present in Fehling's reagent is_______ B.M. (Nearest integer).

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Which of the following compounds is an example of hypnotic drug ?

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Given below are two statements : Statement I : In polluted water values of both dissolved oxygen and BOD are...

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The number of molecule(s) or ion(s) from the following having non-planar structure is_______.$...

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Consider the following reaction sequence : The product 'B' is :

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Match List I with List II. Choose the correct answer from the options given below:

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The oxidation state of manganese in the product obtained in a reaction of potassium permanganate and hydrogen peroxide in basic...

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Among the following ores Bauxite, Siderite, Cuprite, Calamine, Haematite, Kaolinite, Malachite, Magnetite, Sphalerite, Limonite, Cryolite, the number of principal ores...

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Q JEE MAIN 2022

The correct order of energy of absorption for the following metal complexes is

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When enthanol is heated with conc. $\mathrm{H}_2 \mathrm{SO}_4$, a gas is produced. The compound formed, when this gas is treated...

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Q JEE MAIN 2022

Consider the above reaction, the compound 'A' is :

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Consider the above reaction sequence, the Product 'C is :

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The total number of acidic oxides from the following list is: $...

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Q JEE MAIN 2022

Which of the following has least tendency to liberate $\mathrm{H}_2$ from mineral acids?

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Q JEE MAIN 2022

Given below are two statements.

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Considering the above reactions, the compound 'A' and compound 'B' respectively are :

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Q JEE MAIN 2022

When a certain amount of solid A is dissolved in 100 g of water at 25 °C to make a...

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The correct order of density is

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A gas (Molar mass $=280 \mathrm{~g} \mathrm{~mol}^{-1}$ ) was burnt in excess $\mathrm{O}_2$ in a constant volume calorimeter and during...

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Q JEE MAIN 2022

Match List–I with List–II, match the gas evolved during each reaction. Choose the correct answer from the options given below...

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Which among the following pairs of the structures will give different products on ozonolysis? (Consider the double bonds in the...

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High purity (>99.95%) dihydrogen is obtained by

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Which among the following is the strongest Bronsted base ?

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For a real gas at $25^{\circ} \mathrm{C}$ temperature and high pressure ( 99 bar ) the value of compressibility factor...

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Given below are two statements. Statement I : Pig iron is obtained by heating cast iron with scrap iron. Statement...

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Q JEE MAIN 2022

Which among the following pairs has only herbicides ?

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Q JEE MAIN 2022

The normality of $\mathrm{H}_2 \mathrm{SO}_4$ in the solution obtained on mixing 100 mL of $0.1 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4$ with 50...

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Q JEE MAIN 2022

The metal complex that is diamagnetic is (Atomic number : Fe, 26; Cu, 29)

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The first ionization enthalpies of Be, B, N and O follow the order

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$\mathrm{Fe}^{3+}$ cation gives a prussian blue precipitate on addition of potassium ferrocyanide solution due to the formation of:

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Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R....

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For micelle formation, which of the following statements are correct? (A) Micelle formation is an exothermic process. (B) Micelle formation...

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Q JEE MAIN 2022

Match List-I with List-II

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Compound A undergoes following sequence of reactions to give compound ' B '. The correct structure and chirality of compound...

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Q JEE MAIN 2022

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R....

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The molar conductivity of a conductivity cell filled with 10 moles of 20 mL NaCl solution is $\wedge_{\mathrm{m1}}$ and that...

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Which of the following statement is incorrect ?

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The products obtained from a reaction of hydrogen peroxide and acidified potassium permanganate are

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Q JEE MAIN 2022

Which of the following enhances the lathering property of soap?

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$\mathrm{Ka}_1, \mathrm{Ka}_2$ and $\mathrm{Ka}_3$ are the respective ionization constants for the following reactions (a) (b), and (c). (a) $...

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Q JEE MAIN 2022

The metal salts formed during softening of hardwater using Clark's method are :

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Match List-I with List-IIChoose the correct answer from the options given below:

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Two solutions A and B are prepared by dissolving 1 g of non-volatile solutes X and Y. respectively in 1...

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An organic compound 'A' contains nitrogen and chlorine. It dissolves readily in water to give a solution that turns litmus...

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Q JEE MAIN 2022

Match List I with List II : Choose the correct answer from the options given below

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Q JEE MAIN 2022

Correct structure of $\gamma$-methylcyclohexane carbaldehyde is :

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Q JEE MAIN 2022

The metal that is not extracted from its sulphide ore is :

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The metal that has very low melting point and its periodic position is closer to a metalloid is :

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Q JEE MAIN 2022

Match List-I with List-II. Choose the correct answer from the option given below:

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Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R....

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Q JEE MAIN 2022

In the presence of sunlight, benzene reacts with $ \mathrm{Cl}_2 $ to give product, X. The number of hydrogens in...

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Q JEE MAIN 2022

At $30^{\circ} \mathrm{C}$, the half life for the decomposition of $\mathrm{AB}_2$ is 200 s and is independent of the initial...

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Q JEE MAIN 2022

Dinitrogen is a robust compound, but reacts at high altitude to form oxides. The oxide of nitrogen that can damage...

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The difference between spin only magnetic moment values of $\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_3\right]_{\mathrm{Cl}}$ and $\left[\mathrm{Cr}_2\left(\mathrm{H}_2 \mathrm{O}\right)_3\right]_{\mathrm{l}} \mathrm{Cl}_3$ is $\_\_\_\_$ .

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Q MEMORY BASED QUESTION 2026

Select correct statement/s among the following (A) Propanal and propanone are Functional isomer. (B) Ethoxy ethare and methoxy propane are...

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Q JEE MAIN 2022

Class XII students were asked to prepare one litre of buffer solution of pH 8.26 by their chemistry teacher. The...

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For a reaction $A \rightarrow 2 B+C$ the half lives are 100 s and 50 s when the concentration of...

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Q MEMORY BASED QUESTION 2026

In the following reaction, $\mathrm{MnO}_4^{2-} \xrightarrow{\mathrm{H}^{+}}$ Manganate ion undergoes ion undergoes disproportionation to form

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Q JEE MAIN 2022

The amount of charge in F (Faraday) required to obtain one mole of iron from $\mathrm{Fe}_3 \mathrm{O}_4$ is $\_\_\_\_$ ....

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Q MEMORY BASED QUESTION 2026

Observe the following reaction sequence: Which of the following is the correct structure for P,Q and R ?

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Arrange the following in increasing order of their covalent character. (A) $\mathrm{CaF}_2$ (B) $\mathrm{CaCl}_2$ (C) $\mathrm{CaBr}_2$ (D) $\mathrm{Cal}_2$

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At 298 K , the equilibrium constant is $2 \times 10^{15}$ for the reaction: $$ \mathrm{Cu}(\mathrm{~s})+2 \mathrm{Ag}^{+}(\mathrm{aq}) \rightleftharpoons \mathrm{Cu}^{2+}(\mathrm{aq})+2 \mathrm{Ag}(\mathrm{~s})...

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Q MEMORY BASED QUESTION 2026

mass percentage of Nitrogen in product $\mathrm{E}=$ ?

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Q JEE MAIN 2026

Given below are two statements. Statement I : Arginine and Tryptophan are essential amino acids. Statement II : Glycine does...

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Q JEE MAIN 2026

Which of the following is the correct order with respect to the property indicated?

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Q JEE MAIN 2026

For two chemical reactions $A$ and $B$, if the difference between their activation energy is 20 kJ at $...

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Q JEE MAIN 2026

In ' S ' estimation 0.7 g of an organic compound gives $\mathbf{1 g B a S O O}_{\mathbf{4}}$ in...

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Q JEE MAIN 2022

Hemoglobin contains 0.34% of iron by mass. The number of Fe atoms in 3.3 g of hemoglobin is : (Given...

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Q JEE MAIN 2022

Match List-I with List-IIChoose the correct answer from the options given below:

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Major product 'B' of the following reaction sequence is:

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Among the following the number of state variable is ______. Internal energy (U) Volume (V) Heat (q) Enthalpy (H)

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Among the following the number of curves not in accordance with Freundlich adsorption isotherm is

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The structure of A in the given reaction is:

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For a reaction, given below is the graph of $\ln \mathrm{k}$ vs $\frac{1}{\mathrm{~T}}$. The activation energy for the reaction is...

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On reaction with stronger oxidizing agent like $\mathrm{KIO}_4$, hydrogen peroxide oxidizes with the evolution of $\mathrm{O}_2$. The oxidation number of...

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Q JEE MAIN 2022

Which of the reaction is suitable for concentrating ore by leaching process ?

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A sample of 0.125 g of an organic compound when analysed by Duma's method yields 22.78 mL of nitrogen gas...

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Given below are two statements: Statement I : The non bio-degradable fly ash and slag from steel industry can be...

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The reaction occurring as below comes to equilibrium under a total pressure of 1 atm. Analysis of the system shows...

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Low oxidation state of metals in their complexes are common when ligands:

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In neutral or alkaline solution, $\mathrm{MnO}_4^{-}$ oxidises thiosulphate to:

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When 800 mL of 0.5 M nitric acid is heated in a beaker, its volume is reduced to half and...

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In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical ? (A)...

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A gaseous mixture of two substances A and B, under a total pressure of 0.8 atm is in equilibrium with...

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If the wavelength for an electron emitted from H -atom is $3.3 \times 10^{-10} \mathrm{~m}$, then energy absorbed by the...

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2.4 g coal is burnt in a bomb calorimeter in excess of oxygen at 298 K and 1 atm pressure....

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Octahedral complexes of copper (II) undergo structural distortion (Jahn-Teller). Which one of the given copper (II) complexes will show the...

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The pressure of a moist gas at $27^{\circ} \mathrm{C}$ is 4 atm . The volume of the container is doubled...

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Metal $M$ crystallizes into a FCC lattice with the edge length of $4.0 \times 10^{-8} \mathrm{~cm}$. The atomic mass of...

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Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R) Assertion...

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Q JEE MAIN 2022

Match List–I with List–II. Choose the correct answer from the options given below :

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The wavelength of an electron and a neutron will become equal when the velocity of the electron is x times...

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2 L of $0.2 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4$ is reacted with 2 L of 0.1 M NaOH solution, the molarity of...

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Q JEE-Main 2022

The enthalpy of combustion of propane, graphite and dihydrogen at 298 K are: $-2220.0 \mathrm{~kJ} \mathrm{~mol}^{-1},-393.5 \mathrm{~kJ}$ mol-1 and $...

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An element A of group 1 shows similarity to an element B belonging to group 2. If A has maximum...

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Find out the major product for the reaction.

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A mixture of hydrogen and oxygen contains 40% hydrogen by mass when the pressure is 2.2 bar. The partial pressure...

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Among the following species $$ \mathrm{N}_2, \mathrm{~N}_2^{+}, \mathrm{N}_2^{-}, \mathrm{N}_2^{2-}, \mathrm{O}_2, \mathrm{O}_2^{+}, \mathrm{O}_2^{-}, \mathrm{O}_2^{2-} $$ the number of species showing diamagnetism...

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Which of the following 3d-metal ion will give the lowest enthalpy of hydration $\left(\Delta_{\text {hyd }} \mathrm{H}\right)$ when dissolved in...

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Chlorophyll extracted from the crushed green leaves was dissolved in water to make 2 L solution of Mg of concentration...

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The formulas of A and B for the following reaction sequence are

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Outermost electronic configurations of four elements A, B, C, D are given below: (A) $3 \mathrm{~s}^2$ (B) $...

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Given below two statements i Statement I. On heating with $\mathrm{KHSO}_4$, glycerol is dehydrated and acrolein is formed. Statement II...

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Q MEMORY BASED QUESTION 2026

HYDROCARBONS

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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Given below are two statements : One is labeled as Assertion A and the other is labeled as Reason R...

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When borax is heated with CoO on a platinum loop, blue coloured bead formed is largely due to:

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Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R) Assertion...

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Drugs used to bind to receptors, inhibiting its natural function and blocking a message are called :

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Two statements in respect of drug–enzyme interaction are given below Statement I : Action of an enzyme can be blocked...

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Which of the following is reducing sugar?

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During the denaturation of proteins, which of these structures will remain intact ?

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In neutral or faintly alkaline medium, $\mathrm{KMnO}_4$ being a powerful oxidant can oxidize, thiosulphate almost quantitatively, to sulphate. In this...

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Q JEE MAIN 2022

Given below are two statements: Statement I: For KI, molar conductivity increases steeply with dilution. Statement II: For carbonic acid,...

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Match List I with List II

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Stearic acid and polyethylene glycol react to form which one of the following soap/s detergents ?

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Portland cement contains 'X' to enhance the setting time. What is 'X'?

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Given below are two statements : one is labeled as Assertion A and the other is labeled as Reason R...

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The Plot of pH-metric titration of weak base $\mathrm{NH}_4 \mathrm{OH}$ vs strong acid HCl looks like:

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The correct stability order of the following diazonium salt is

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Compound I is heated with Conc. HI to give a hydroxy compound A which is further heated with Zn dust...

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Given below are two statements. Statement I : Stannane is an example of a molecular hydride. Statement II: Stannane is...

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The major product of the following reaction is

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Arrange the following in increasing order of reactivity towards nitration

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In following pairs, the one in which both transition metal ions are colourless is :

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Which reactant will give the following alcohol on reaction with one mole of phenyl magnesium bromide (PhMgBr) followed by acidic...

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The major product in the given reaction is

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The correct decreasing order of energy, for the orbitals having, following set of quantum numbers: (A) $\mathrm{n}=3, \ell=0, \mathrm{~m}=0$ (B)...

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Q JEE-Main 2022

Melamine polymer is formed by the condensation of :

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Dinitrogen and dioxygen. the main constituents of air do not react with each other in atmosphere to form oxides of...

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The products formed in the following reaction, A and B are

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Number of lone pairs of electrons in the central atom of $\mathrm{SCl}_2, \mathrm{O}_3, \mathrm{ClF}_3$ and $\mathrm{SF}_6$, respectively, are in

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An organic compound ' A ' on reaction with $\mathrm{NH}_3$ followed by heating gives compound B . Which on further...

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Match List I with List II

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Which of the following compounds is not aromatic?

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In liquation process used for tin (Sn), the metal :

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Given below are two statements : One is labeled as Assertion A and the other is labeled as Reason R...

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Which one of the following reactions does not represent correct combination of substrate and product under the given conditions ?

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Match List–I with List–II. Choose the correct answer from the options given below :

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Lithium nitrate and sodium nitrate, when heated separately, respectively, give :

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The difference in the reaction of phenol with bromine in chloroform and bromine in water medium is due to :

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Which of the following pair is not isoelectronic species? (At. no. Sm, 62; Er, 68: Yb, 70: Lu, 71; Eu,...

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Most stable product of the following reaction is:

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Which of the following relation is not correct ?

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Which technique among the following, is most appropriate in separation of a mixture of 100 mg of p-nitrophenol and picric...

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Given below are the critical temperatures of some of the gases :

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Concentrated $\mathrm{HNO}_3$ reacts with lodine to give

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$ \dot{\mathrm{C}} \mathrm{l}+\mathrm{CH}_4 \rightarrow \mathrm{~A}+\mathrm{B} $ A and B in the above atmospheric reaction step are

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The reaction of zinc with excess of aqueous alkali, evolves hydrogen gas and gives :

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Identify the incorrect statement from the following.

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White phosphorus reacts with thionyl chloride to give

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In metallurgy the term "gangue" is used for:

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The dark purple colour of KMnO4 disappears in the titration with oxalic acid in acidic medium. The overall change in...

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Statement I : An alloy of lithium and magnesium is used to make aircraft plates. Statement II : The magnesium...

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The first ionization enthalpy of $\mathrm{Na}, \mathrm{Mg}$ and Si, respectively, are: 496,737 and $786 \mathrm{~kJ} \mathrm{~mol}^{-1}$. The first ionization enthalpy...

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Which of the given reactions is not an example of disproportionation reaction ?

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The products obtained during treatment of hard water using Clark's method are:

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Borazine, also known as inorganic benzene, can be prepared by the reaction of 3-equivalents of "X" with 6-equivalents of "Y"....

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100 mL of 5% (w/v) solution of NaCl in water was prepared in 250 mL beaker. Albumin from the egg...

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Given below are two statements :One is labeled as Assertion A and the other is labeled as Reason R Assertion...

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200 mL of 0.01 M HCl is mixed with 400 mL of $0.01 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4$. The pH of the...

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Reaction of $\mathrm{BeCl}_2$ with $\mathrm{Li}_4 \mathrm{IH}_4$ gives :

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A compound 'A' on reaction with 'X' and 'Y' produces the same major product but different by product 'a' and...

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$\begin{aligned} & \mathrm{N}_{2(\mathrm{~g})}+3 \mathrm{H}_{2(\mathrm{~g})} \rightleftharpoons 2 \mathrm{NH}_{3(\mathrm{~g})} \\ & 20 \mathrm{~g} 5 \mathrm{~g}\end{aligned}$ Consider the above reaction, the limiting reagent...

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Q JEE MAIN 2022

The correct decreasing order for metallic character is

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Which of the following pair of molecules contain odd electron molecule and an expanded octet molecule?

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$$ \begin{aligned} & \mathrm{C}(\mathrm{~s})+\mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{CO}_2(\mathrm{~g})+400 \mathrm{~kJ} \\ & \mathrm{C}(\mathrm{~s})+\frac{1}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{CO}(\mathrm{~g})+100 \mathrm{~kJ} \end{aligned} $$ When coal of purity...

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Which of the following can be used to prevent the decomposition of H2O2?

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The photochemical smog does not generally contain :

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Given below are two statements : One is labeled as Assertion A and the other is labeled as Reason R...

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The interhalogen compound formed from the reaction of bromine with excess of fluorine is a :

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Refining using liquation method is the most suitable for metals with :

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Given below are the quantum numbers for 4 electrons. A. $\mathrm{n}=3, l=2, \mathrm{~m}_{\square}=1, \mathrm{~m}_{\mathrm{s}}=+1 / 2$ B. $...

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The geometry around boron in the product ' B ' formed from the following reaction is $$ \begin{aligned} & \mathrm{BF}_3+\mathrm{NaH}...

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Given two statements below : Statement I : In Cl2 molecule the covalent radius is double of the atomic radius...

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Choose the correct order of density of the alkali metals :

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The reaction of $\mathrm{H}_2 \mathrm{O}_2$ with potassium permanganate in acidic medium leads to the formation of mainly:

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Consider the reaction $$ 4 \mathrm{HNO}_3(l)+3 \mathrm{KCl}(\mathrm{~s}) \rightarrow \mathrm{Cl}_2(\mathrm{~g})+\mathrm{NOCl}(\mathrm{~g})+2 \mathrm{H}_2 \mathrm{O}(\mathrm{~g})+3 \mathrm{KNO}_3(\mathrm{~s}) $$ The amount of $\mathrm{HNO}_3$ required to produce...

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Match List - I with List - II. Choose the correct answer from the options given below :

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Match List - I with List - II. Choose the correct answer from the options given below :

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The compound(s) that is(are) removed as slag during the extraction of copper is i. (1) CaO (2) FeO (3) $...

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The IUPAC nomenclature of an element with electronic configuration $[\mathrm{Rn}] 5 \mathrm{f}^{14} 6 \mathrm{~d}^1 7 \mathrm{~s}^2$ is:

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Match list- I with list-ll

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20 mL of $0.1 \mathrm{M} \mathrm{NH}_4 \mathrm{OH}$ is mixed with 40 mL of 0.05 M HCl . The pH of...

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The depression in freezing point observed for a formic acid solution of concentration $0.5 \mathrm{~mL} \mathrm{~L}^{-1}$ is $0.0405^{\circ} \mathrm{C}$. Density...

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Which of the following sets of quantum numbers is not allowed ?

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$\mathrm{SO}_2 \mathrm{Cl}_2$ on reaction with excess of water results into acidic mixture $$ \mathrm{SO}_2 \mathrm{Cl}_2+2 \mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{H}_2 \mathrm{SO}_4+2...

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In the given reaction, The number of $\alpha$ electrons present in the product ' P ' is $\_\_\_\_$ .

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In the given reaction (i) $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ the number of $\mathrm{sp}^2$ hybridised carbon ( s ) in compound '...

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The number of chiral alcohol(s) with molecular formula $\mathrm{C}_4 \mathrm{H}_{10} \mathrm{O}$ is $\_\_\_\_$

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For the reaction given below: $$ \mathrm{CoCl}_{3 m} \times \mathrm{NH}_3+\mathrm{AgNO}_3(\mathrm{ag}) \rightarrow $$ If two equivalents of AgCl precipitate out, then...

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Spin only magnetic moment of $[\mathrm{MnBr} \mathbf{r}]^{4-}$ is $\_\_\_\_$ B.M. (round off to the closest integer)

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The equation $$ k=\left(6.5 \times 10^{12} \mathrm{~s}^{-1}\right) \mathrm{e}^{-28000 \mathrm{kJT}} $$ is followed for the decomposition of compound A . The...

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The cell potential for the given cell at $298 \mathrm{~K} \mathrm{Pt}\left|\mathrm{H}_2(\mathrm{~g}, 1 \mathrm{bar})\right| \mathrm{H}^{+}(\mathrm{ag}) \| \mathrm{Cu}^{2+}(\mathrm{aq}) \mid \mathrm{Cu}(\mathrm{s})$ is 0.31...

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Elevation in boiling point for 1.5 molal solution of glucose in water is 4 K . The depression in freezing...

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2.2 g of nitrous oxide $\left(\mathrm{N}_2 \mathrm{O}\right)$ gas is cooled at a constant pressure of 1 atm from 310 K...

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A box contains 0.90 g of liquid water in equilibrium with water yapour at $27^{\circ} \mathrm{C}$. The equilibrium vapour pressure...

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A white precipitate was formed when $\mathrm{BaCl}_2$ was added to water extract of an inorganic salt. Further, a gas '...

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0.01 M KMnO4 solution was added to 20.0 mL of 0.05 M Mohr’s salt solution through a burette. The initial...

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The major product of the following reaction contains _______ bromine atom(s).

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The mixture of chloroxylenol and terpineol is an example of :

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The complete combustion of 0.492 g of an organic compound containing ‘C’, ‘H’ and ‘O’ gives 0.793g of $\mathrm{CO}_2$ and...

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The structure of protein that is unaffected by heating is :

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(a) $\mathrm{CoCl}_3 \cdot 4 \mathrm{NH}_3$ (b) $\mathrm{CoCl}_3 \cdot 5 \mathrm{NH}_3$ (c) $\mathrm{CoCl}_3 \cdot .6 \mathrm{NH}_3$ and (d) $...

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Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R....

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When you walk through a metal detector carrying a metal object in your pocket, it raises an alarm. This phenomenon...

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The moles of methane required to produce 81 g of water after complete combustion is $\_\_\_\_$ $\times 10^{-2} \mathrm{~mol}$. [nearest...

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Reaction of $\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$ with excess ammonia and in the presence of oxygen results into a diamagnetic product. Number of...

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In Friedel-Crafts alkylation of aniline, one gets :

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Catalyst A reduces the activation energy for a reaction by $10 \mathrm{~kJ} \mathrm{~mol}^{-1}$ at 300 K . The ratio of...

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A radioactive element has a half life of 200 days. The percentage of original activity remaining after 83 days is...

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$$ \mathrm{Cu}(\mathrm{~s})+\mathrm{Sn}^{2+}(0.001 \mathrm{M}) \rightarrow \mathrm{Cu}^{2+}(0.01 \mathrm{M})+\mathrm{Sn}(\mathrm{~s}) $$ The Gibbs free energy change for the above reaction at 298 K is...

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Two isomers (A) and (B) with Molar mass $184 \mathrm{~g} / \mathrm{mol}$ and elemental composition $...

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For the given reactions $\mathrm{Sn}^{2+}+2 \mathrm{e}-\rightarrow \mathrm{Sn}$ $\mathrm{Sn}^{4+}+4 \mathrm{e}-\rightarrow \mathrm{Sn}$ The electrode potentials are; $\mathrm{E}_{\mathrm{Sn}^{2+} / \mathrm{Sn}}^{\circ}=-0.140 \mathrm{~V}$ and $...

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$40^{\circ}$ of HI undergoes decomposition to $\mathrm{H}_2$ and $\mathrm{I}_2$ at $300 \mathrm{~K} . \Delta \mathrm{G}^{\ominus}$ for this decompostion reaction at...

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2.5 g of protein containing only glycine $\left(\mathrm{C}_2 \mathrm{H}_5 \mathrm{NO}_2\right)$ s dissolved in water to make 500 mL of solution....

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For combustion of one mole of magnesium in an open container at 300 K and 1 bar pressure, $...

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The osmotic pressure exerted by a solution prepared by dissolving 2.0 g of protein of molar mass $60 \mathrm{~kg} \mathrm{~mol}^{-1}$...

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A fish swimming in water body when taken out from the water body is covered with a film of water...

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In AM modulation, a signal is modulated on a carrier wave such that maximum and minimum amplitude are found to...

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Amongst $\mathrm{SF}_4, \mathrm{XeF}_4, \mathrm{CF}_4$ and $\mathrm{H}_2 \mathrm{O}$, the number of species with two lone pairs of electrons $\_\_\_\_$

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The drug tegamet is :

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In a solid A B. A atoms are in ccp arrangement and $B$ atoms occupy all the octahedral sites. If...

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When sugar ‘X’ is boiled with dilute $\mathrm{H}_2 \mathrm{SO}_4$ in alcoholic solution, two isomers ‘A’ and ‘B’ are formed. ‘A’...

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CNG is an important transportation fuel. When 100 g CNG is mixed with 208 oxygen in vehicles, it leads to...

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Which of the following carbocations is most stable :

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Which one of the following is a water soluble vitamin, that is not excreted easily?

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Given below are two statements, one is Assertion (A) and other is Reason (R). Assertion (A) : Natural rubber is...

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With respect to the following reaction, consider the given statements : (A) o-Nitroaniline and p-nitroaniline are the predominant products (B)...

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Which of the following is NOT an example of synthetic detergent?

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Isobutyraldehyde on reaction with formaldehyde and $\mathrm{K}_2 \mathrm{CO}_3$ gives compound ‘A’. Compound ‘A’ reacts with KCN and yields compound ‘B’,...

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Sulphur dioxide is one of the components of polluted air. $\mathrm{SO}_2$ is also a major contributor to acid rain. The...

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A $\xrightarrow[\substack{\text { (ii) } \mathrm{CN}^{-} \\ \text {(ii) } \mathrm{H}_2 \mathrm{O} / \mathrm{H}^{+}}]{\text {(i) } \mathrm{Cl}_2 \Delta} 4$-Bromophenyl acetic...

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Aqueous solution of which of the following boron compounds will be strongly basic in nature?

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The major product (P) of the given reaction is (where, Me is – $\left.\mathrm{CH}_3\right)$

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The final product ‘C’ is the following series series of reactions

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Number of lone pair (s) of electrons on central atom and the shape of $\mathrm{BrF}_3$ molecule respectively, are.

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The correct IUPAC name of the following compound is :

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Correct statement about photo-chemical smog is :

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Amongst baking soda, caustic soda and washing soda carbonate anion is present in :

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Which statement is NOT correct for p-toluenesulphonyl chloride?

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Which of the following oxoacids of sulphur contains “S” in two different oxidation states?

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The final product ‘A’ in the following reaction sequence

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Given below are two statements . Statement I: In $\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}, \mathrm{Cu}-\mathrm{O}$ bonds are present. Statement II:...

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Among the given oxides of nitrogen; $\mathrm{N}_2 \mathrm{O}, \mathrm{N}_2 \mathrm{O}_3, \mathrm{~N}_2 \mathrm{O}_4$ and $\mathrm{N}_2 \mathrm{O}_5$ the number of compound/(s) having...

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The reagent, from the following, which converts benzoic acid to benzaldehyde in one step is

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Among the following basic oxide is :

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Halogenation of which one of the following will yield m-substituted product with respect to methyl group as a major product?

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Hydrogen has three isotopes : protium $\left({ }^1 \mathrm{H}\right)$ deuterium $\left({ }^2 \mathrm{H}\right.$ or D$)$ and tritium $\left({ }^3 \mathrm{H}\right.$...

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Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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Match List-I with List-II. Choose the correct answer from the options given below :

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0.25 g of an organic compound containing chlorine gave 0.40 g of silver chloride in Carius estimation. The percentage of...

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Solve the fig-:

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Match List-I with List-II. Choose the correct answer from the options given below:

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It has been found that for a chemical reaction with rise in temperature by 9K the rate constant gets doubled....

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A student needs to prepare a buffer solution of propanoic acid and its sodium salt with pH 4. The ratio...

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For the reaction taking place in the cell: $$ \begin{aligned} & \mathrm{Pt}(\mathrm{~s})\left|\mathrm{H}_2(\mathrm{~g})\right| \mathrm{H}^{+}(\mathrm{aq}) \| \mathrm{Ag}^{+}(\mathrm{aq}) \mid \mathrm{Ag}(\mathrm{~s}) \\ & \mathrm{E}_{\text...

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pH value of 0.001 M NaOH solution is______.

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A solution containing $2.5 \times 10^{-3} \mathrm{~kg}$ of a solute dissolved in $75 \times 10^{-3} \mathrm{~kg}$ of water boils at...

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In the structure of $\mathrm{SF}_4$ , the lone pair of electrons on S is in.

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4.0 moles of argon and 5.0 moles of $\mathrm{PCl}_5$ are introduced into an evacuated flask of 100 litre capacity at...

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When 5 moles of He gas expand isothermally and reversibly at 300 K from 10 litre to 20 litre, the...

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BeO reacts with HF in presence of ammonia to give [A] which on thermal decomposition produces [B] and ammonium fluoride....

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116 g of a substance upon dissociation reaction, yields 7.5 g of hydrogen, 60g of oxygen and 48.5 g of...

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Consider the following statements : (A) The principal quantum number ‘n’ is a positive integer with values of ‘n’ =...

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Match List I with List II

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Consider the species $\mathrm{CH}_4, \mathrm{NH}_4^{+}$and $\mathrm{BH}_4^{-}$. Choose the correct option with respect to the there species:

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Match List I with List Ii

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Which of the following is the correct plot for the probability density $\psi^2(r)$ as a function of distance ' $r$...

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Given below are two statements. Statement I: Maltose has two $\alpha$-D-glucose units linked at $\mathrm{C}_1$ and $\mathrm{C}_4$ and is a...

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The major product in the following reaction

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Which is true about Buna-N?

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Decarboxylation of all six possible forms of diaminobenzoic acids $\mathrm{C}_6 \mathrm{H}_3\left(\mathrm{NH}_2\right)_2 \mathrm{COOH}$ yields three products A, B and C. Three...

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Match List I with List II

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Using the rules for significant figures, the correct answer for the expression $\frac{0.02858 \times 0.112}{0.5702}$ will be:

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Product ‘A’ of following sequence of reactions is

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What will be the major product of following sequence of reactions?

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Which of the following is most stable?

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On the surface of polar stratospheric clouds, hydrolysis of chlorine nitrate gives A and B while its reaction with HCl...

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Oxidation of toluene to Benzaldehyde can be easily carried out with which of the following reagents?

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Arrange the following coordination compounds in the increasing order of magnetic moments. (Atomic numbers: Mn = 25; Fe = 26)

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Compound A contains 8.7% Hydrogen, 74% Carbon and 17.3% Nitrogen. The molecular formula of the compound is, Given: Atomic masses...

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The ‘f’ orbitals are half and completely filled, respectively in lanthanide ions (Given: Atomic no. Eu, 63; Sm, 62; Tm,...

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In 3d series, the metal having the highest $\mathrm{M}^{2+} / \mathrm{M}$ standard electrode potential is

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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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The gas produced by treating an aqueous solution of ammonium chloride with sodium nitrite is

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The correct order of nucleophilicity is

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The correct order of increasing ionic radii is

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The correct order of increasing intermolecular hydrogen bond strength is

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Statement I : Leaching of gold with cyanide ion in absence of air / O2 leads to cyano complex of...

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Identify the incorrect statement for $\mathrm{PCl}_5$ from the following.

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The neutralization occurs when 10 mL of 0.1 M acid ‘A’ is allowed to react with 30 mL of 0.05...

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How many of the given compounds will give a positive Biuret test ______ ? Glycine, Glycylalanine, Tripeptide, Biuret

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The Novolac polymer has mass of 963 g. The number of monomer units present in it are

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Amongst $\mathrm{FeCl}_3 .3 \mathrm{H}_2 \mathrm{O}, \mathrm{K}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]$ and $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$, the spin-only magnetic moment value of the inner-orbital complex that absorbs...

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In alanylglycylleucylalanylvaline, the number of peptide linkages is______.

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Consider the above reaction. The number of $\pi$ electrons present in the product ' P ' is $\_\_\_\_$

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0.2 g of an organic compound was subjected to estimation of nitrogen by Dumas method in which volume of $\mathrm{N}_2$...

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Manganese (VI) has ability to disproportionate in acidic solution. The difference in oxidation states of two ions it forms in...

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(a) Baryte, (b) Galena, (c) Zinc blende and (d) Copper pyrites. How many of these minerals are sulphide based?

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When 200 mL of 0.2 M acetic acid is shaken with 0.6 g of wood charcoal, the final concentration of...

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The resistance of conductivity cell containing 0.01 M KCl solution at 298 K is $1750 \Omega$. If the conductivity of...

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The measured BOD values for four different water samples (A-D) are as follows: $...

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$\mathrm{PCl}_5$ dissociates as $$ \mathrm{PCl}_5(\mathrm{~g}) \rightleftharpoons \mathrm{PCl}_3(\mathrm{~g})+\mathrm{Cl}_2(\mathrm{~g}) $$ 5 moles of PCl 5 are placed in a 200 litre vessel...

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A company dissolves ' X ' amount of $\mathrm{CO}_2$ at 298 K in 1 litre of water to prepare soda...

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The most common oxidation state of Lanthanoid elements is +3. Which of the following is likely to deviate easily from...

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At 300 K , a sample of 3.0 g of gas A occupies the same volume as 0.2 g of...

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Which one of the following is an example of disproportionation reaction?

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In the flame test of a mixture of salts, a green flame with blue centre was observed. Which one of...

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The oxide which contains an odd electron at the nitrogen atom is

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The structure shown below is of which well-known drug molecule?

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Which of the following is not an example of a condensation polymer?

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s-block element which cannot be qualitatively confirmed by the flame test is

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The conversion of propan-1-ol to n-butylamine involves the sequential addition of reagents. The correct sequential order of reagents is.

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Boiling of hard water is helpful in removing the temporary hardness by converting calcium hydrogen carbonate and magnesium hydrogen carbonate...

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Hex-4-ene-2-ol on treatment with PCC gives 'A'. 'A' on reaction with sodium hypoiodite gives 'B', which on further heating with...

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Which of the following reagents/ reactions will convert 'A' to 'B'?

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The role of depressants in Froth Flotation method* is to

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Given below are two statements. Statement I : The presence of weaker - bonds make alkenes less stable than alkanes....

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Arrange the following carbocations in decreasing order of stability.

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Which of the following elements in considered as a metalloid?

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Some gases are responsible for heating of atmosphere (green house effect). Identify from the following the gaseous species which does...

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The number of radial and angular nodes in 4d orbital are. Respectively

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Transition metal complex with highest value of crystal field splitting ( $\Delta_0$ ) will be

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Consider the following reactions : $$ \begin{aligned} & \mathrm{PCl}_3+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{~A}+\mathrm{HCl} \\ & \mathrm{~A}+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{~B}+\mathrm{HCl} \end{aligned} $$...

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A solution of $\mathrm{Fe}_2\left(\mathrm{SO}_4\right)_3$ is electrolyzed for ' x ' min with a current of 1.5 A to deposit 0.3482...

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At 345 K, the half life for the decomposition of a sample of a gaseous compound initially at 55.5 kPa...

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Amongst $\mathrm{BeF}_2, \mathrm{BF}_3, \mathrm{H}_2 \mathrm{O}, \mathrm{NH}_3, \mathrm{CCl}_4$ and HCl , the number of molecules with non-zero net dipole moment is...

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A rigid nitrogen tank stored inside a laboratory has a pressure of 30 atm at 06:00 am when the temperature...

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A protein ‘A’ contains 0.30% of glycine (molecular weight 75). The minimum molar mass of the protein ‘A’ is________ ×...

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An antiseptic dettol is a mixture of two compounds ' A ' and ' B ' where A has $...

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Which of the following ketone will NOT give enamine on treatment with secondary amines? [where $t-\mathrm{Bu}$ is $\left.-\mathrm{C}\left(\mathrm{CH}_3\right)_3\right]$

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In the given reaction

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Amongst the following, the major product of the given chemical reaction is

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During halogen test, sodium fusion extract is boiled with concentrated HNO3 to

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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion...

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The metal ion (in gaseous state) with lowest spin only magnetic moment value is

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$\mathrm{PCl}_5$ is well known. but $\mathrm{NCl}_5$ is not. Because.

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The number of bridged oxygen atoms present in compound B formed from the following reactions is $\mathrm{Pb}\left(\mathrm{NO}_3\right)_2 \xrightarrow{673} \mathrm{~A}+\mathrm{PbO}+\mathrm{O}_2$ $...

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The correct order of reduction potentials of the following pairs is

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Given below are two statements one is labelled as Assertion A and the other is labelled as Reason R: Assertion...

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Which one of the following compounds is used as a chemical in certain type of fire extinguishers?

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Given below are two statements. Statement I: During electrolytic refining, blister copper deposits precious metals Statement II: In the process...

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In the industrial production of which of the following, molecular hydrogen is obtained as a byproduct?

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The correct order of electron gain enthalpies of Cl, F, Te and Po is

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Match List I with List II. Choose the correct answer from the options given below:

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Which of the following chemical reactions represents Hall-Heroult Process?

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The $\mathrm{K}_{\mathrm{sp}}$ for bismuth sulphide $\left(\mathrm{Bi}_2 \mathrm{~S}_3\right)$ is $1.08 \times 10^{-73}$. The solubility of $\mathrm{Bi}_2 \mathrm{~S}_3$ in $\mathrm{mol} \mathrm{L}^{-1}$ at...

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Solute A associates in water. When 0.7 g of solute A is dissolved in 42.0 g of water, it depresses...

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Metals generally melt at very high temperature. Amongst the following, the metal with the highest melting point will be

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At $25^{\circ} \mathrm{C}$ and 1 atm pressure, the enthalpy of combustion of benzene (1) and acetylene (g) are $...

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The minimum energy that must be possessed by photons in order to produce the photoelectric effect with platinum metal is:...

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For a first order reaction, the time required for completion of $90 \%$ reaction is ' $x$ ' times the...

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| Substance | $\mathrm{H}_2$ | C(graphite) | $\mathrm{C}_2 \mathrm{H}_6(\mathrm{~g})$ | | :--- | :--- | :--- | :--- | |...

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The energy of one mole of photons of radiation of wavelength 300 nm is (Given : $...

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120 of an organic compound that contains only carbon and hydrogen gives 330 g of $\mathrm{CO}_2$ and 270 g of...

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In the estimation of bromine, 0.5 g of an organic compound gave 0.40 g of silver bromide. The percentage of...

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The number of carbon atoms present in the product B is __________.

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Number of complexes which will exhibit synergic bonding amongst, $\left[\mathrm{Cr}(\mathrm{CO})_6\right],\left[\mathrm{Mn}(\mathrm{CO})_5\right]$ and $\left[\mathrm{Mn}_2(\mathrm{CO})_{10}\right]$ is $\_\_\_\_$ .

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The major product ' A ' of the following given reaction has $\_\_\_\_$ $\mathrm{sp}^2$ hybridized carbon atoms. 2,7 - Dimethyl1...

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Observe structures of the following compounds The total number of structures/compounds which possess asymmetric carbon atoms is __________.

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For a first order reaction $A \rightarrow B$, the rate constant, $\mathrm{k}=5.5 \times 10^{-14} \mathrm{~s}^{-1}$ . The time required for...

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Number of electrophilic centre in the given compound is ____

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Kjeldahl's method was used for the estimation of nitrogen in an organic compound. The ammonia evolved from 0.55 g of...

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A 0.166 g sample of an organic compound was digested with cone. $\mathrm{H}_2 \mathrm{SO}_4$ and then distilled with NaOH ....

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The quantity of electricity in Faraday needed to reduce 1 mol of $\mathrm{Cr}_2 \mathrm{O}_7^{2-}$ to $\mathrm{Cr}^{3+}$ is $\_\_\_\_$ .

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An acidified manganate solution undergoes disproportionation reaction. The spin-only magnetic moment value of the product having manganese in higher oxidation...

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In the cobalt-carbonyl complex: $\left[\mathrm{Co}_2(\mathrm{CO})_4\right]$, number of Co -Co bonds is " X " and terminal CO ligands is "...

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The number of terminal oxygen atoms present in the product B obtained from the following reaction is ________. $...

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The solubility product of a sparingly soluble salt $\mathrm{A}_2 \mathrm{X}_3$ is $1.1 \times 10^{-23}$. If specific conductance of the solution...

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The difference in oxidation state of chromium in chromate and dichromate salts is _______.

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The vapour pressures of two volatile liquids A and B at 25°C are 50 Torr and 100 Torr, respectively. If...

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The activation energy of one of the reactions in a biochemical process is 532611 J $\mathrm{mol}^{-1}$. When the temperature falls...

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4.0 L of an ideal gas is allowed to expand isothermally into vacuum until the total volume is 20 L....

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The cell potential for the following cell $\mid$ $$ \mathrm{Pt}\left|\mathrm{H}_2(\mathrm{~g})\right| \mathrm{H}^{+}(\mathrm{ag})| | \mathrm{Cu}^{2+}(0.01 \mathrm{M}) \mid \mathrm{Cu}(\mathrm{~s}) $$ is 0.576 V...

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A dilute solution of sulphuric acid is electrolyzed using a current of 0.10 A for 2 hours to produce hydrogen...

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The hybridization of P exhibited in $\mathrm{PF}_5$ is $\mathrm{sp}^x \mathrm{~d}^y$. The value of y is __________.

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If the work function of a metal is $6.63 \times 10^{-19} \mathrm{~J}$, the maximum wavelength of the photon required to...

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1.2 mL of acetic acid is dissolved in water to make 2.0 L of solution. The depression in reezing point...

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A 2.0 g sample containing $\mathrm{MnO}_2$ is treated with HCl liberating $\mathrm{Cl}_2$. The $\mathrm{Cl}_2$.gas is passed into a solution of...

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Total number of possible stereoisomers of dimethyl cyclopentane is ___________

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The osmotic pressure of blood is 7.47 bar at 300 K . To inject glucose to a patient intravenously, it...

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17.0 g of $\mathrm{NH}_3$ completely vapourises at – $33.42^{\circ} \mathrm{C}$ and 1 bar pressure and the enthalpy change in the...

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Two elements A and B which form 0.15 moles of A2B and AB3 type compounds. If both A2B and AB3...

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$$ 2 \mathrm{O}_3(\mathrm{~g}) \rightleftharpoons 3 \mathrm{O}_2(\mathrm{~g}) $$ At 300 K , ozone is fifty percent dissociated. The standard free energy...

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Acidified potassium permanganate solution oxidises oxalic acid. The spin-only magnetic moment of the manganese product formed from the above reaction...

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The number of statement(s) correct from the following for copper (at no. 29) is/are ______

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Atoms of element $X$ form hcp lattice and those of element $Y$ occupy $\frac{2}{3}$ of its tetrahedral voids. The percentage...

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The rate constant for a first order reaction is given by the following equation: $\ln \mathrm{k}=33.24-\frac{2.0 \times 10^4 \mathrm{~K}}{\mathrm{~T}}$ The...

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The limiting molar conductivities of $\mathrm{Nal}^{\circ} \mathrm{NaNO}_3$ and $\mathrm{AgNO}_3$ are $12.7,12.0$ and $13.3 \mathrm{mS} \mathrm{m}^2 \mathrm{~mol}^{-1}$, respectively (all at $...

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Given below are two statements. Statement I : Phenols are weakly acidic Statement II : Therefore they are freely soluble...

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$2 \mathrm{NOCl}(\mathrm{g}) \rightleftharpoons 2 \mathrm{NO}(\mathrm{g})+\mathrm{Cl}_2(\mathrm{~g})$ In an experiment, 2.0 moles of NOCl was placed in a one-litre flask and the...

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During the qualitative analysis of salt with cation $y^{2+}$ addition of a reagent $(X)$ to alkaline solution of the salt...

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2 g of a non-volatile non-electrolyte solute is dissolved in 200 g of two different solvents A and B whose...

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Which one of the following is NOT a copolymer ?

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If the uncertainty in velocity and position of a minute particle in space are, $2.4 \times 10^{-26}\left(\mathrm{~ms}^{-1}\right)$ and $10^{-7}(\mathrm{~m})$ respectively....

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Which of the following is not a broad spectrum antibiotic?

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A primary aliphatic amine on reaction with nitrous acid in cold (273 K) and there after raising temperature of reaction...

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Which of the following compound does not contain sulphur atom ?

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Metal deficiency defect is shown by $\mathrm{Fe}_{e 0.93} \mathrm{O}$. In the crystal, some $\mathrm{Fe}^{2+}$ cations are missing and loss of...

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A polysaccharide ' X ' on boiling with dil $\mathrm{H}_2 \mathrm{SO}_4$ at 393 K under 2-3 atm pressure yields '...

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Sugar moiety in DNA and RNA molecules respectively are

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Identify the major product formed in the following sequence of reactions :

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Match List-I with List-II

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The polymer, which can be stretched and retains its original status on releasing the force is

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The number of oxygens present in a nucleotide formed from a base, that is present only in RNA is ________.

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Consider the above reaction, the product A and product B respectively are

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Which one of the following compounds is inactive towards $\mathrm{S}_{\mathrm{N}} 1$ reaction?

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Compound 'P' on nitration with dil. HNO3 yields two isomers (A) and (B). These isomers can be separated by steam...

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On complete combustion 0.30 g of an organic compound gave 0.20 g of carbon dioxide and 0.10 g of water....

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The correct structure of product ‘A’ formed in the following reaction.

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Given below are two statements : Statement I : The esterification of carboxylic acid with an alcohol is a nucleophilic...

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Match List-I with List-II Choose the correct answer from the options given below:

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The spin-only magnetic moment value of an octahedral complex among $\mathrm{CoCl}_3 .4 \mathrm{NH}_3, \mathrm{NiCl}_2 .6 \mathrm{H}_2 \mathrm{O}$ and $...

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In the given conversion the compound A is:

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Given below are two statements: Statements-I : In Hofmann degradation reaction, the migration of only an alkyl group takes place...

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The major product (P) in the reaction

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2.0 g of H2 gas is adsorbed on 2.5 g of platinum powder at 300 K and 1 bar pressure....

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Which of the following reactions will yield benzaldehyde as a product?

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Two isomers 'A' and 'B' with molecular formula $\mathrm{C}_4 \mathrm{H}_8$ give different products on oxidation with $\mathrm{KMnO}_4$ in acidic medium....

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Number of grams of bromine that will completely react with 5.0g of pent-1-ene is ______ $\times 10^{-2} \mathrm{~g}$.(Atomic mass of...

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50 mL of $0.1 \mathrm{M} \mathrm{CH}_3 \mathrm{COOH}$ is being titrated against 0.1 M NaOH . When 25 mL of NaOH...

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Which of the following structures are aromatic in nature?

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If $\left[\mathrm{Cu}\left(\mathrm{H}_2 \mathrm{O}\right)_4\right]^{2+}$ absorbs a light of wavelength 600 nm for d–d transition, then the value of octahedral crystal field...

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The acid that is believed to be mainly responsible for the damage of Taj Mahal is

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The major product of the following reaction is:

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A 0.5 percent solution of potassium chloride was found to freeze at –0.24°C. If the percentage dissociation of potassium chloride...

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' A ' and ' B ' respectively are: $...

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The oxoacid of phosphorus that is easily obtained from a reaction of alkali and white phosphorus and has two P-H...

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For a given chemical reaction $\gamma_1 A+\gamma_2 B \rightarrow \gamma_3 C+\gamma_4 D$ Concentration of C changes from 10 mmol $\mathrm{dm}^{-3}$...

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For complete combustion of methanol $\mathrm{CH}_3 \mathrm{OH}(1)+\frac{3}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{CO}_2(\mathrm{~g})+2 \mathrm{H}_2 \mathrm{O}(1)$ the amount of heat produced as measured by...

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Which of the following is structure of a separating funnel?

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Given below are two statements: Statement I: Classical smog occurs in cool humid climate. It is a reducing mixture of...

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Which of the following will have maximum stabilization due to crystal field?

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Heating white phosphorus with conc. NaOH solution gives mainly

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Match List-I with List-II Choose the correct answer from the options given below:

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$\mathrm{BeCl}_2$ reacts with $\mathrm{LiAlH}_4$ to give

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Match the List-I with List- II. Choose the most appropriate answer from the option given below:

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Match the List-I with List- II. Choose the most appropriate answer from the options given below:

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Which one of the following reactions indicates the reducing ability of hydrogen peroxide in basic medium ?

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A chemical which stimulates the secretion of pepsin is :

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The electronic configuration of Pt (atomic number 78) is:

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Which of the following sets are correct regarding polymer ? (A) Copolymer : Buna–S (B) Condensation polymer : Nylon–6,6 (C)...

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Which of the following is a correct statement ?

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The solubility of AgCl will be maximum in which of the following ?

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Among the following structures, which will show the most stable enamine formation ? (Where Me is $-\mathrm{CH}_3$ )

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Arrange the following in the decreasing order of their covalent character : (A) LiCl (B) NaCl (C) KCl (D) CsCl...

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In a cell, the following reactions take place $...

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Which of the following statements are correct ? (A) The electronic configuration of Cr is $[\mathrm{Ar}] 3 \mathrm{~d}^5 4 \mathrm{~s}^1$....

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The standard free energy change ( $\Delta \mathrm{G}^{\circ}$ ) for $50 \%$ dissociation of $\mathrm{N}_2 \mathrm{O}_4$ into $\mathrm{NO}_2$ at $...

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Given below are two statements : Statement I : $[\mathrm{Ni}(\mathrm{CN}) 4]^2$ is square planar and diamagnetic complex. with $\mathrm{dsp}^2$ hybridization...

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1 L aqueous solution of $\mathrm{H}_2 \mathrm{SO}_4$ contains $0.02 \mathrm{~m} \mathrm{~mol} \mathrm{H}_2 \mathrm{SO}_4 .50 \%$ of this solution is diluted...

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10 mL of gaseous hydrocarbon on combustion gives 40 mL of $\mathrm{CO}_2(\mathrm{~g})$ and 50 mL of water vapour. Total number...

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The standard entropy change for the reaction $4 \mathrm{Fe}(\mathrm{s})+3 \mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{Fe}_2 \mathrm{O}_3(\mathrm{~s})$ is $-550 \mathrm{JK}^{-1}$ at 298 K....

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Which of the following is an example of polyester?

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Consider the following redox reaction: $$ \mathrm{MnO}_4^{-}+\mathrm{H}^{+}+\mathrm{H}_2 \mathrm{C}_2 \mathrm{O}_4 \rightleftharpoons \mathrm{Mn}^{2+}+\mathrm{H}_2 \mathrm{O}+\mathrm{CO}_2 $$ The standard reduction potentials are given as...

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Which one of the lanthanoids given below is the most stable in divalent form?

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If 5 moles of an ideal gas expands from 10 L to a volume of 100 L at 300 K...

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The major product of the above reaction is

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The longest wavelength of light that can be used for the ionisation of lithium atom (Li) in its ground state...

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For a certain reaction at $300 \mathrm{~K}, \mathrm{~K}=10$, then $\Delta \mathrm{G}^{\circ}$ for the same reaction is $\times 10^{-1} \mathrm{~kJ} \mathrm{~mol}^{-1}$....

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From the vitamins $\mathrm{A}, \mathrm{B}_1, \mathrm{~B}_6, \mathrm{~B}_{12}, \mathrm{C}, \mathrm{D}, \mathrm{E}$ and K , the number vitamins that can be stored...

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The amount of electricity in Coulomb required for the oxidation of 1 mol of $\mathrm{H}_2 \mathrm{O}$ to $\mathrm{O}_2$ is $...

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Given below are two statements : Statement -I :The pentavalent oxide of group- 15 element. $\mathrm{E}_2 \mathrm{O}_5$.. is less acidic...

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Which of the following is an example of conjugated diketone?

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The values of conductivity of some materials at $298.15 \mathrm{~K}^{-1}$ in $\mathrm{Sm}^{-1}$ are $...

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Following Kjeldahl's method, 1 g of organic compound released ammonia, that neutralised 10 mL of $2 \mathrm{MH}_2 \mathrm{SO}_4$. The percentage...

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Addition of $\mathrm{H}_2 \mathrm{SO}_4$ to $\mathrm{BaO}_2$ produces:

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The molarity of 1 L orthophosphoric acild $\left(\mathrm{H}_3 \mathrm{PO}_4\right)$ having $70 \%$ purity by weight (specific gravity $1.54 \mathrm{~g} \mathrm{~cm}^{-3}$...

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Two statements are given below : Statement I: The melting point of monocarboxylic acid with even number of carbon atoms...

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Nitrogen gas is obtained by thermal decomposition of

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Mass of ethylene glycol (antifreeze) to be added to 18.6 kg of water to protect the freezing point at $...

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In the reaction of potassium dichromate, potassium chloride and sulfuric acid (conc.), the oxidation state of the chromium in the...

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Number of compounds which give reaction with Hinsberg's reagent is

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Match List – I with List – II Choose the most appropriate answer from the options given below:

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Dihydrogen reacts with CuO to give

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Number of moles of $\mathrm{H}^{+}$ions required by 1 mole of $\mathrm{MnO}_4^{-}$to oxidise oxalate ion to $\mathrm{CO}_2$ is $\_\_\_\_$

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In the given reactions sequence, the major product ‘C’ is :

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The number of tripeptides formed by three different amino acids using each amino acid once is

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Number of isomeric products formed by monochlorination of 2-methylbutane in presence of sunlight is

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A compound $(x)$ with molar mass $108 \mathrm{~g} \mathrm{~mol}^{-1}$ undergoes acetylation to give product with molar mass $192 \mathrm{~g} \mathrm{~mol}^{-1}$....

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Match List-I with List-II Choose the correct answer from the options given below.

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The following data were obtained during the first order thermal decomposition of a gas A at constant volume:

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Given are two statements one is labelled as Assertion A and other is labelled as Reason R. Assertion A :Magnesium...

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The distance between $\mathrm{Na}^{+}$and $\mathrm{Cl}^{-}$ions in 'solid NaCl of density $43.1 \mathrm{~g} \mathrm{~cm}^{-3}$ is $\_\_\_\_$ $\times 10^{-10} \mathrm{~m}$. (Nearest Integer)...

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The number of N atoms is 681 g of $\mathrm{C}_7 \mathrm{H}_5 \mathrm{~N}_3 \mathrm{O}_6$ is $\mathrm{x} \times 10^{21}$. The value of...

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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason(R) Assertion (A):...

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Q JEE MAIN 2024

Total number of isomeric compounds (including stereoisomers) formed by monochlorination of 2 -methyl butane is

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Q JEE MAIN 2022

Which one of the following is an example of artificial sweetner ?

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Given below are two statements: Statement (I): Dimethyl glyoxime forms a six membered covalent chelate when treated with $\mathrm{NiCl}_2$ solution...

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Q JEE MAIN 2022

Using very little soap while washing clothes, does not serve the purpose of cleaning of clothes because

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$\mathrm{r}=\mathrm{k}[\mathrm{A}]$ for a reaction, $50 \%$ of A is decomposed in 120 minutes. The time taken for $90 \%$ decomposition...

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Q JEE-Main 2022

Which one of the following elemental forms is not present in the enamel of the teeth?

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Element "E" belongs to the period 4 and group 16 of the periodic table. The valence shell electron configuration of...

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The reaction of with bromine and KOH gives $\mathrm{RNH}_2$ as the end product. Which one of the following is the...

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Q JEE MAIN 2024

Solubility of calcium phosphate (molecular mass, M ) in water is $\mathrm{W}_{\mathrm{g}}$ per 100 mL at $25^{\circ} \mathrm{C}$. Its solubility...

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Q JEE MAIN 2022

Match List-I with List-II Choose the correct answer from the options given below:

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Q JEE-Main 2022

The most stable trihalide of nitrogen is:

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Q JEE MAIN 2024

Acid D formed in above reaction is:

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Q JEE MAIN 2022

Match List-I with List-II Choose the correct answer from the options given below:

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Q JEE MAIN 2022

Which will have the highest enol content ?

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The Zeta potential is related to which property of colloids”

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Q JEE MAIN 2022

In the following reaction : The compounds A and B respectively are :-

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Consider the above reaction sequence and identify the product B.

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Identify the correct statement for B2H6 from those given below. Choose the most appropriate answer from the options given below...

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Based upon VSEPR theory, match the shape (geometry) of the molecules in List-I with the molecules in List-II and select...

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Q JEE MAIN 2022

The incorrect statement about the imperfections in solids is :

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Q JEE MAIN 2024

Given below are two $\leqslant$ statements: Statement (I): $\mathrm{SiO}_2$ and $\mathrm{GeO}_2$ are acidic while SnO and PbO are amphoteric in...

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Q JEE MAIN 2022

$$ \left(\mathrm{C}_7 \mathrm{H}_5 \mathrm{O}_2\right)_2 \xrightarrow{\mathrm{hv}}[\mathrm{X}]+2 \dot{\mathrm{C}}_6 \mathrm{H}_5+2 \mathrm{CO}_2 $$ Consider the above reaction and identify the intermediate ' $X$ '

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Q JEE MAIN 2022

The intermediate X, in the reaction is?

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Q JEE MAIN 2024

Consider the following elements. Which of the following is/are true about $\mathrm{A}^{\prime}, \mathrm{B}^{\prime}, \mathrm{C}^{\prime}$ and $\mathrm{D}^{\prime}$ ? A. Order of...

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Q JEE MAIN 2022

Given below are two statements : Statement I : In 'Lassaigne's Test, when both nitrogen and sulphur are present in...

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Q JEE MAIN 2024

$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ and $\left[\mathrm{CoF}_6\right]^{3-}$ are respectively known as:

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Q JEE MAIN 2022

The major product in the reaction

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Q JEE MAIN 2022

Polar stratospheric clouds facilitate the formation of :

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Q JEE MAIN 2024

The correct order of reactivity in electrophilic substitution reaction of the following compounds is :

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Q JEE MAIN 2024

The functional group that shows negative resonance effect is:

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Given below are the oxides: $\mathrm{Na}_2 \mathrm{O}, \mathrm{As}_2 \mathrm{O}_3, \mathrm{~N}_2 \mathrm{O}, \mathrm{NO}$ and $\mathrm{Cl}_2 \mathrm{O}_7$ Number of amphoteric oxides is:

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Q JEE-Main 2022

The highest industrial consumption of molecular hydrogen is to produce compounds of element:

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Q JEE MAIN 2022

Consider the following reaction : A + alkali → B (Major Product) If B is an oxoacid of phosphorus with...

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Q JEE MAIN 2022

The IUPAC name of ethylidene chloride is :

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Q JEE MAIN 2022

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion...

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Q JEE MAIN 2024

Choose the correct statements from the following A. $\mathrm{Mn}_2 \mathrm{O}_7$ is an oil at room temperature B. $\mathrm{V}_2 \mathrm{O}_4$ reacts...

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Q JEE-Main 2022

Which of the following statements are correct ? Choose the most appropriate answer from the options given below:

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Q JEE MAIN 2024

Match List - I with List - II. Choose the correct answer from the options given below :

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Q JEE MAIN 2022

The products formed in the following reaction.

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Q JEE MAIN 2022

The correct order of melting points of hydrides of group 16 elements is :

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Q JEE MAIN 2024

The four quantum numbers for the electron in the outer most orbital of potassium (atomic no. 19) are

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Q JEE MAIN 2022

In the following structures, which one is having staggered conformation with maximum dihedral angle?

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Q JEE MAIN 2024

The number of radial node/s for 3p orbital is:

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Q JEE MAIN 2022

The correct order of melting point is :

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Q JEE MAIN 2024

In the given reactions identify A and B.

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Q JEE MAIN 2022

Phenol on reaction with dilute nitric acid, gives two products. Which method will be most effective for large scale separation?

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Q JEE MAIN 2024

Given below are two statements : Statement I: Group 13 trivalent halides get easily hydrolyzed by water due to their...

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Q JEE MAIN 2022

Consider the following reaction: $2 \mathrm{HSO}_4^{-}(\mathrm{aq}) \xrightarrow[\text { (2)Hydrolysis }]{\text { (1) Electrolysis }} 2 \mathrm{HSO}_4^{-}+2 \mathrm{H}^{+}+\mathrm{A}$ The dihedral angle...

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Q JEE MAIN 2024

Which among the following has highest boiling point?

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Q JEE MAIN 2022

Given below are two statements: Statement I : According to the Ellingham diagram, any metal oxide with higher $\Delta \mathrm{G}^{\circ}$...

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Q JEE MAIN 2022

The eutrophication of water body results in :

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Q JEE MAIN 2024

Lassaigne's test is used for detection of :

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Q JEE MAIN 2022

Choose the correct stability order of group 13 elements in their +1 oxidation state.

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Q JEE MAIN 2024

Select the compound from the following that will show intramolecular hydrogen bonding.

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Q JEE MAIN 2022

Among the following, which is the strongest oxidizing agent ?

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Q JEE MAIN 2022

Consider the ions/molecule For increasing bond order the correct option is :

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Cerium (IV) has a noble gas configuration. Which of the following is correct statement about it?

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Q JEE MAIN 2024

The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are...

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Q JEE MAIN 2022

It the radius of the 3rd Bohr’s orbit of hydrogen atom is r3 and the radius of 4th Bohr’s orbit...

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Q JEE MAIN 2022

White precipitate of AgCl dissolves in aqueous ammonia solution due to formation of :

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Q JEE MAIN 2022

Which one of the following alkaline earth metal ions has the highest ionic mobility in its aqueous solution?

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Q JEE MAIN 2022

An evacuated glass vessel weights 40.0 g when empty, 135.0 g when filled with a liquid of density $...

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Q JEE MAIN 2024

Which of the following is least ionic ?

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Q JEE-Main 2022

Given below are two statements : Statement I : Emulsions of oil in water are unstable and sometimes they separate...

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Number of electron deficient molecules among the following $\mathrm{PH}_3, \mathrm{~B}_2 \mathrm{H}_6, \mathrm{CCl}_4, \mathrm{NH}_3$, LiH and $\mathrm{BCl}_3$ is

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Q JEE MAIN 2024

Which of the following compounds show color due to d-d transition?

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A commercially sold conc. HCl is 35% HCl by mass. If the density of this commercial acid is 1.46 g/mL,...

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Q JEE MAIN 2022

Leaching of gold with dilute aqueous solution of NaCN in presence of oxygen gives complex [A], which on reaction with...

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Q JEE MAIN 2024

Identify the name reaction.

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The strongest reducing agent amount the following is:

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For a reaction at equilibrium $$ \mathrm{A}(\mathrm{~g}) \rightleftharpoons \mathrm{B}(\mathrm{~g})+\frac{1}{2} \mathrm{C}(\mathrm{~g}) $$ the relation between dissociation constant (K), degree of dissociation...

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Q JEE MAIN 2022

The pair, in which ions are isoelectronic with $\mathrm{Al}^{3+}$ is :-

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Q JEE MAIN 2024

Choose the correct statements from the following A. All group 16 elements form oxides of general formula $\mathrm{EO}_2$ and $\mathrm{EO}_3$...

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Q JEE MAIN 2022

Incorrect statement for Tyndall effect is :-

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Q JEE MAIN 2022

Bonding in which of the following diatomic molecules(s) become(s) stronger, on the basis of MO Theory, by removal of an...

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Q JEE-Main 2022

Match List – I with List – II

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Q JEE MAIN 2024

$\mathrm{A}_{(\mathrm{g})} \rightleftharpoons \mathrm{B}_{(\mathrm{g})}+\frac{\mathrm{C}}{2}(\mathrm{~g})$ The correct relationship between $K_P, \alpha$ and equilibrium pressure $P$ is

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Q JEE-Main 2022

Consider the following pairs of electrons (A) (a) $\mathrm{n}=3, \ell=1, \mathrm{~m}_1=1, \mathrm{~m}_{\mathrm{s}}=+\frac{1}{2}$ (b) $\mathrm{n}=3, \ell=2, \mathrm{~m}_1=1, \mathrm{~m}_{\mathrm{s}}=+\frac{1}{2}$ (B) (a) $...

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Q JEE MAIN 2024

Given below are two statements : Statement I: Aniline reacts with con. $\mathrm{H}_2 \mathrm{SO}_4$ followed by heating at $453-473 \mathrm{~K}$...

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Q JEE MAIN 2024

The azo-dye $(\mathrm{Y})$ formed in the following reactions is Sulphanilic acid $+\mathrm{NaNO}_2+\mathrm{CH}_3 \mathrm{COOH} \rightarrow \mathrm{X}$

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Given below are two statements : Statement (I): Both metal and non-metal exist in p and d-block elements. Statement (II):...

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Q JEE-Main 2022

If a rocket runs on a fuel ( $\mathrm{C}_{15} \mathrm{H}_{30}$ ) and liquid oxygen, the weight of oxygen required and...

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Q JEE MAIN 2024

Match List - I with List - II. Choose the correct answer from the options given below.

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Q JEE MAIN 2024

Select the option with correct property –

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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion...

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Q JEE MAIN 2024

Identify structure of 2,3-dibromo-1-phenylpentane.

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Given below are two statements: Statement (I): A $\pi$ bonding MO has lower electron density above and below the inter-nuclear...

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Major product of the following reaction is -

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The transition metal having highest $3^{\text {rd }}$ ionisation enthalpy is :

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Number of spectral lines obtained in $\mathrm{He}^{+}$spectra, when an electron makes transition from fifth excited state to first excited state...

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Identify major product ' P ' formed in the following reaction

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2-chlorobutane $+\mathrm{Cl}_2 \rightarrow \mathrm{C}_4 \mathrm{H}_8 \mathrm{Cl}_2$ (isomers) Total number of optically active isomers shown by $\mathrm{C}_4 \mathrm{H}_8 \mathrm{Cl}_2$, obtained in...

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Q JEE MAIN 2024

Given below are two statements : Statement I: $\mathrm{S}_8$ solid undergoes disproportionation reaction under alkaline conditions to form $\mathrm{S}^{2-}$ and...

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Q JEE MAIN 2024

Number of metal ions characterized by flame test among the following is $\_\_\_\_$ $$ \mathrm{Sr}^{2+}, \mathrm{Ba}^{2+}, \mathrm{Ca}^{2+}, \mathrm{Cu}^{2+}, \mathrm{Zn}^{2+}, \mathrm{Co}^{2+},...

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Total number of species from the following which can undergo disproportionation reaction $\_\_\_\_$ . $$ \mathrm{H}_2 \mathrm{O}_2, \mathrm{ClO}_3^{-}, \mathrm{P}_4, \mathrm{Cl}_2,...

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Q JEE MAIN 2024

Number of geometrical isomers possible for the given structure is/are ______.

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Identify A and B in the following reaction sequence.

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The pH of an aqueous solution containing 1 M benzoic acid $\left(\mathrm{pK}_{\mathrm{a}}=4.20\right)$ and 1 M sodium benzoate is 4.5. The...

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Q JEE MAIN 2024

A sample of $\mathrm{CaCO}_3$ and $\mathrm{MgCO}_3$ weighed 2.21 g is ignited to constant weight of 1.152 g . The composition...

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The total number of correct statements, regarding the nucleic acids is _______. A. RNA is regarded as the reserve of...

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Two reactions are given below: $$ \begin{aligned} & 2 \mathrm{Fe}_{(\mathrm{s})}+\frac{3}{2} \mathrm{O}_{2(\mathrm{~g})} \rightarrow \mathrm{Fe}_2 \mathrm{O}_{3(\mathrm{~s})}, \Delta \mathrm{H}^{\mathrm{o}}=-822 \mathrm{~kJ} / \mathrm{mol} \\...

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$\mathrm{NO}_2$ required for a reaction is produced by decomposition of $\mathrm{N}_2 \mathrm{O}_5$ in $\mathrm{CCl}_4$ as by equation $...

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Q JEE MAIN 2024

Match List I with List II Choose the correct answer from the options given below :

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Number of complexes which show optical isomerism among the following is $\_\_\_\_$ cis $-\left[\mathrm{Cr}(\mathrm{ox})_2 \mathrm{Cl}_2\right]^{3-},\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}$, cis $-\left[\mathrm{Pt}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{2+}$, cis $...

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Q JEE MAIN 2024

Reduction potential of ions are given below: The correct order of their oxidising power is:

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Q JEE MAIN 2024

Choose the correct statements about the hydrides of group 15 elements. A. The stability of the hydrides decreases in the...

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The total number of molecules with zero dipole moment among $\mathrm{CH}_4, \mathrm{BF}_3, \mathrm{H}_2 \mathrm{O}, \mathrm{HF}, \mathrm{NH}_3, \mathrm{CO}_2$ and $\mathrm{SO}_2$ is

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Q JEE MAIN 2024

A and B formed in the following reactions are:

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A constant current was passed through a solution of $\mathrm{AuCl}_4^{-}$ion between gold electrodes. After a period 10.0 minutes, the increase...

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Standard enthalpy of vapourisation for $\mathrm{CCl}_4$ is $30.5 \mathrm{~kJ} \mathrm{~mol}^{-1}$. Heat required for vapourisation of $284 \mathrm{~g}_{\mathrm{g}}$ of $\mathrm{CCl}_4$ at...

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Q JEE MAIN 2024

The solution from the following with highest depression in freezing point/lowest freezing point is

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The half-life of radioisotopic bromine - 82 is 36 hours. The fraction which remains after one day is $\times 10^{-2}$....

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The correct stability order of carbocations is

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The total number of 'Sigma' and Pi bonds in 2formylhex-4-enoic acid is

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If 50 mL of 0.5 M oxalic acid is required to neutralise 25 mL of NaOH solution, the amount of...

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Given below are two statements: Statement-I: Since fluorine is more electronegative than nitrogen, the net dipole moment of $\mathrm{NF}_3$ is...

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Molality of $0.8 \mathrm{MH}_2 \mathrm{SO}_4$ solution (density $1.06 \mathrm{~g} \mathrm{~cm}^{-3}$ ) is $\times 10^{-3} \mathrm{~m}$.

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Total number of compounds with Chiral carbon atoms from following is $...

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The following concentrations were observed at 500 K for the formation of $\mathrm{NH}_3$ from $\mathrm{N}_2$ and $\mathrm{H}_2$. At equilibrium :...

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Q JEE MAIN 2024

The coordination geometry around the manganese in decacarbonyldimanganese (0)

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The oxidation number of iron in the compound formed during brown ring test for $\mathrm{NO}_3^{-}$ion is

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9.3 g of aniline is subjected to reaction with excess of acetic anhydride to prepare acetanilide. The mass of acetanilide...

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Given below are two statements: Statement - I: Along the period, the chemical reactivity of the element gradually increases from...

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The total number of anti bonding molecular orbitals, formed from 2s and 2p atomic orbitals in a diatomic molecule is

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If a substance ${ }^{\prime} A$ ' dissolves in solution of a mixture of ${ }^{\prime} B$ ' and $...

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The hydrogen electrode is dipped in a solution of $\mathrm{pH}=3$ at $25^{\circ} \mathrm{C}$. The potential of the electrode will be...

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Anomalous behaviour of oxygen is due to its

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Alkaline oxidative fusion of MnO_2 gives "A" which on electrolytic oxidation in alkaline solution produces B. A and B respectively...

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Given below are two statements: Statement I: Fluorine has most negative electron gain enthalpy in its group. Statement II: Oxygen...

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1 mole of PbS is oxidised by X moles of $\mathrm{O}_3$ to get " Y " moles of $...

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The orange colour of $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ and purple colour of $\mathrm{KMnO}_4$ is due to

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Q JEE MAIN 2024

Which one of the following will show geometrical isomerism?

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Volume of 3 MNaOH formula weight $40 \mathrm{~g} \mathrm{~mol}^{-1}$ ) which can be prepared from 84 g of NaOH is...

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Q JEE MAIN 2024

The molecule/ion with square pyramidal shape is:

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Alkyl halide is converted into alkyl isocyanide by reaction with

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For a certain thermochemical reaction $M \rightarrow N$ at $\mathrm{T}=400 \mathrm{~K}, \Delta \mathrm{H}^{\ominus}=77.2 \mathrm{~kJ} \mathrm{~mol}^{-1}, \Delta \mathrm{~S}=122 \mathrm{JK}^{-1}, \log$ equilibrium...

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Q JEE MAIN 2024

The products A and B formed in the following reaction scheme are respectively

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The element having the highest first ionization enthalpy is

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Which of the following statements are correct about Zn,Cd and Hg ?

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The Spin only magnetic moment value of square planar complex $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}\left(\mathrm{NH}_2 \mathrm{CH}_3\right)\right] \mathrm{Cl}$ is B.M. (Nearest integer) (Given atomic...

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IUPAC name of following compound is

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Product A and B formed in the following set of reactions are:

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Which of the following acts as a strong reducing agent? (Atomic number : $\mathrm{Ce}=58, \mathrm{Eu}=63, \mathrm{Gd}= 64, \mathrm{Lu}=71$ )

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Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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Identify the reagents used for the following conversion

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m-chlorobenzaldehyde on treatment with 50% KOH solution yields

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The product A formed in the following reaction is:

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Time required for completion of $99.9 \%$ of a First order reaction is times of half life $\left(t_{1 / 2}\right)$...

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Salicylaldehyde is synthesized from phenol, when reacted with

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The number of non-polar molecules from the following is $\mathrm{HF}, \mathrm{H}_2 \mathrm{O}, \mathrm{SO}_2, \mathrm{H}_2, \mathrm{CO}_2, \mathrm{CH}_4, \mathrm{NH}_3, \mathrm{HCl}, \mathrm{CHCl}_3, \mathrm{BF}_3$

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Q JEE MAIN 2024

Which among the following purification methods is based on the principle of "Solubility" in two different solvents?

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Q JEE MAIN 2024

Match List I with List II Choose the correct answer from the options given below :-

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Total number of ions from the following with noble gas configuration is $...

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The time period of simple harmonic motion of mass M in the given figure is $\pi \sqrt{\frac{\alpha M}{5 K}}$, where...

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Q JEE MAIN 2024

Identity the incorrect pair from the following:

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Q JEE MAIN 2024

The incorrect statement regarding conformations of ethane is:

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Which of the following cannot function as an oxidising agent ?

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Q JEE MAIN 2024

Which structure of protein remains intact after coagulation of egg white on boiling?

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The quantity which changes with temperature is :

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Identify B formed in the reaction. $...

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Two blocks of mass 2 kg and 4 kg are connected by a metal wire going over a smooth pulley...

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Identify from the following species in which $\mathrm{d}^2 \mathrm{sp}^3$ hybridization is shown by central atom:

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Given below are two statements: Statement (I) : Oxygen being the first member of group 16 exhibits only -2 oxidation...

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Light from a point source in air falls on a convex curved surface of radius 20 cm and refractive index...

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Bond line formula of $\mathrm{HOCH}(\mathrm{CN})_2$ is:

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In the following circuit, the battery has an emf of 2 V and an internal resistance of $\frac{2}{3} \Omega$. The...

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Major product formed in the following reaction is a mixture of:

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Match List-I with List-II. Choose the correct answer from the options given below:

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The final product A, formed in the following reaction sequence is:

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The technique used for purification of steam volatile water immiscible substance is:

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The molecular formula of second homologue in the homologous series of mono carboxylic acids is

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Phenolic group can be identified by a positive:

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Choose the correct option having all the elements with d^10 electronic configuration from the following:

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Given below are two statements : Statement (I): In the Lanthanoids, the formation of $\mathrm{Ce}^{+4}$ is favoured by its noble...

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Which of the following statements is not correct about rusting of iron?

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Phenol treated with chloroform in presence of sodium hydroxide, which further hydrolysed in presence of an acid results

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A reagent which gives brilliant red precipitate with Nickel ions in basic medium is

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The correct IUPAC name of $\mathrm{K}_2 \mathrm{MnO}_4$ is

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According to IUPAC system, the compound is named as

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Which of the following reaction is correct ?

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Match List I with List II Choose the correct answer from the options given below :

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Match List I with List II Choose the correct answer from the options given below :

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The ascending acidity order of the following H atoms is

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Which among the following halide/s will not show $\mathrm{S}_{\mathrm{N}} 1$ reaction:

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The order of relative stability of the contributing structure is: Choose the correct answer from the options given below:

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In a group of 100 persons 75 speak English and 40 speak Hindi. Each person speaks at least one of...

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20 mL of sodium iodide solution gave 4.74 g silver iodide when treated with excess of silver nitrate solution. The...

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The equilibrium constant for decomposition of $\mathrm{H}_2 \mathrm{O}$ (g) $\mathrm{H}_2 \mathrm{O}(\mathrm{g}) \rightleftharpoons \mathrm{H}_2(\mathrm{~g})+\frac{1}{2} \mathrm{O}_2(\mathrm{~g})\left(\Delta \mathrm{G}^{\circ}=92.34 \mathrm{~kJ} \mathrm{~mol}^{-1}\right)$ is $...

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$x \mathrm{mg}$ of $\mathrm{Mg}(\mathrm{OH})_2($ molar mass $=58)$ is required to be dissolved in 1.0 L of water to produce a...

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A metal complex with a formula $\mathrm{MCl}_4 \cdot 3 \mathrm{NH}_3$ is involved in $\mathrm{sp}^3 \mathrm{~d}^2$ hybridisation. It upon reaction with...

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Three dice are rolled. If the probability of getting different numbers on the three dice is , where p and...

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Sea water, which can be considered as a 6 molar $(6 \mathrm{M})$ solution of NaCl , has a density of...

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The molar conductance of an infinitely dilute solution of ammonium chloride was found to be $185 \mathrm{Scm}^2 \mathrm{~mol}^{-1}$ and the...

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The energy of an electron in first Bohr orbit of H -atom is -13.6 eV. The magnitude of energy value...

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The amount of calcium oxide produced on heating 150 kg limestone ( pure) is _________ kg. (Nearest integer) Given: Molar...

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The IUPAC name of the following compound is

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Given below are two statements. Statement (I): Molal depression constant $K_f$ is given by $\frac{M_1 R T_f}{\Delta S_{\text {fus }}}$,...

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One litre buffer solution was prepared by adding 0.10 mol each of and in deionised water. The change in pH...

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The number of species from the following that are involved in $\mathrm{sp}^3 \mathrm{~d}^2$ hybridization is $$ \left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}, \mathrm{SF}_6,\left[\mathrm{CrF}_6\right]^{3-},\left[\mathrm{CoF}_6\right]^{3-},\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-} \text {...

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In which pairs, the first ion is more stable than the second?

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Identify the structure of the final product (D) in the following sequence of the reactions : Total number of hybridised...

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Match the LIST-I with LIST-II Choose the correct answer from the options given below:

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Consider the ground state of chromium atom $(Z=24)$ . How many electrons are with Azimuthal quantum number $l=1$ and $l=2$...

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Consider the following molecule (X). The structure of X is The major product formed when the given molecule (X) is...

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In Dumas' method 292 mg of an organic compound released 50 mL of nitrogen gas at 300 K temperature and...

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Butane reacts with oxygen to produce carbon dioxide and water following the equation given below. If 174.0 kg of butane...

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' $X$ ' is the number of electrons in $t_{2 g}$ orbitals of the most stable complex ion among $...

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The number of paramagnetic metal complex species among $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+},\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$, $\left[\mathrm{MnCl}_6\right]^{3-},\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-},\left[\mathrm{CoF}_6\right]^{3-},\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$ and $\left[\mathrm{FeF}_6\right]^{3-}$ with same number of unpaired electrons is...

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Which among the following compounds give yellow solid when reacted with ? Choose the correct answer from the options given...

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Given below are two statements : Statement (I) : On hydrolysis, oligo peptides give rise to fewer number of -amino...

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A toxic compound "A" when reacted with NaCN in aqueous acidic medium yields an edible cooking component and food preservative...

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Match the LIST-I with LIST-II Choose the correct answer from the options given below:

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Half life of zero order reaction $\mathrm{A} \rightarrow$ product is 1 hour, when initial concentration of reactant is $2.0 \mathrm{molL}^{-1}$....

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Consider the following plots of log of rate constant $k(\log k)$ vs $\frac{1}{T}$ for three different reactions. The correct order...

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The extra stability of half-filled subshell is due to : (A) Symmetrical distribution of electrons (B) Smaller coulombic repulsion energy...

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Given below are two statements : Statement (I) : Alcohols are formed when alkyl chlorides are treated with aqueous potassium...

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Mixture of 1 g each of chlorobenzene, aniline and benzoic acid is dissolved in 50 mL ethyl acetate and placed...

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The correct decreasing order of spin only magnetic moment values (BM) of $\mathrm{Cu}^{+}, \mathrm{Cu}^{2+}, \mathrm{Cr}^{2+}$ and $\mathrm{Cr}^{3+}$ ions is :

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The descending order of basicity of following amines is :

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The incorrect relationship in the following pairs in relation to ionisation enthalpies is :

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The number of unpaired electrons responsible for the paramagnetic nature of the following complex species are respectively :

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Consider the given data : (a) $\mathrm{HCl}(\mathrm{g})+10 \mathrm{H}_2 \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{HCl} .10 \mathrm{H}_2 \mathrm{O} \quad \Delta \mathrm{H}=-69.01 \mathrm{~kJ} \mathrm{~mol}^{-1}$ (b)...

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Choose the incorrect trend in the atomic radii (r) of the elements.

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Liquid and form an ideal solution. The vapour pressures of pure liquids and are 350 and 750 mm Hg respectively...

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The atomic number of the element from the following with lowest $1^{\text {st }}$ ionisation enthalpy is :

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A dipeptide, " $x$ " on complete hydrolysis gives " $y$ " and " $z$ ". " $y$ " on...

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' X ' is the number of acidic oxides among $\mathrm{VO}_2, \mathrm{~V}_2 \mathrm{O}_3, \mathrm{CrO}_3, \mathrm{~V}_2 \mathrm{O}_5$ and $\mathrm{Mn}_2 \mathrm{O}_7$. The...

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Match List - I with List - II. Choose the correct answer from the options given below :

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Match List - I with List - II. Choose the correct answer from the options given below :

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Which one of the following reactions will not lead to the desired ether formation in major proportion? (iso- $\mathrm{Bu} \Rightarrow$...

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The correct order of basicity for the following molecules is :

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Given below are two statements : Statement (I) : For $\mathrm{ClF}_3$, all three possible structures may be drawn as follows....

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Choose the correct set of reagents for the following conversion.

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In $\mathrm{SO}_2, \mathrm{NO}_2^{-}$and $\mathrm{N}_3^{-}$the hybridizations at the central atom are respectively:

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Given below are two statements : Statement (I): The first ionisation enthalpy of group 14 elements is higher than the...

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Given below are two statements: Statement I : A homoleptic octahedral complex, formed using monodentate ligands, will not show stereoisomerism...

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The correct statements from the following are. (A) $\mathrm{Tl}^{3+}$ is a powerful oxidising agent (B) $\mathrm{Al}^{3+}$ does not get reduced...

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The rate constant for a first order reaction is $20 \mathrm{~min}^{-1}$. The time required for the initial concentration of the...

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Which of the following binary mixture does not show the behaviour of minimum boiling azeotropes?

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The number of molecules which gives haloform test among the following molecules is _____.

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What is the correct IUPAC name of

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Enthalpies of formation of $\mathrm{CCl}_4(\mathrm{~g}), \mathrm{H}_2 \mathrm{O}(\mathrm{g}), \mathrm{CO}_2(\mathrm{~g})$ and $\mathrm{HCl}(\mathrm{g})$ are $-105,-242,-394$ and $-92 \mathrm{~kJ} \mathrm{~mol}^{-1}$ respectively. The magnitude of...

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The correct statement amongst the following is :

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The number of alkali metal(s), from Li, K, Cs, Rb having ionization enthalpy greater than 400 kJ $\mathrm{mol}^{-1}$ and forming...

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The number of optically active products obtained from the complete ozonolysis of the given compound is

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Choose the correct option for structures of A and B, respectively

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Assume carbon burns according to following equation : $2 \mathrm{C}_{(\mathrm{s})}+\mathrm{O}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{CO}(\mathrm{g})$ When 12 g carbon is burnt in...

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$\mathrm{A}(\mathrm{g}) \rightarrow \mathrm{B}(\mathrm{g})+\mathrm{C}(\mathrm{g})$ is a first order reaction. The reaction was started with reactant A only. Which of the following...

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A sample of a metal oxide has formula $\mathrm{M}_{0.83} \mathrm{O}_{100}$. The metal M can exist in two oxidation states +2...

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The hydration energies of $\mathrm{K}^{+}$and $\mathrm{Cl}^{-}$are $-x$ and $-y \mathrm{~kJ} / \mathrm{mol}$ respectively. If lattice energy of KCl is $...

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At 298 K, the solubility of silver chloride in water is $1.434 \times 10^{-3} \mathrm{~g} \mathrm{~L}^{-1}$. The value of $...

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Match List - I with List - II. List - I (A) Solution of chloroform and acetone (B) Solution of...

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The resistivity of a 0.8 M solution of an electrolyte is $5 \times 10^{-3} \Omega \mathrm{~cm}$ . Its molar conductivity...

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" P " is an optically active compound with molecular formula $\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}$. When ' P ' is treated...

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Match the LIST-I with LIST-II Choose the correct answer from the options given below:

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On combustion 0.210 g of an organic compound containing $\mathrm{C}, \mathrm{H}$ and O gave $0.127 \mathrm{gH}_2 \mathrm{O}$ and $0.307 \mathrm{gCO}_2$...

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In a first order decomposition reaction, the time taken for the decomposition of reactant to one fourth and one eighth...

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Given below are two statements: Statement I : $\mathrm{H}_2 \mathrm{Se}$ is more acidic than $\mathrm{H}_2 \mathrm{Te}$ Statement II : $\mathrm{H}_2$...

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Xg of nitrobenzene on nitration gave 4.2 g of m -dinitrobenzene. $\mathrm{X}=$ $\_\_\_\_$ g. (nearest integer) [Given : molar mass...

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A sample of $n$-octane $(1.14 \mathrm{~g})$ was completely burnt in excess of oxygen in a bomb calorimeter, whose heat capacity...

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Among, and Cu , identify the element with highest enthalpy of atomisation. The spin only magnetic moment value of that...

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A perfect gas ( 0.1 mol ) having $\overline{\mathrm{C}}_v=1.50 \mathrm{R}$ (independent of temperature) undergoes the above transformation from point 1...

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The total number of structural isomers possible for the substituted benzene derivatives with the molecular formula $\mathrm{C}_9 \mathrm{H}_{12}$ is $\_\_\_\_$

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Sea water contains $29.25 \% \mathrm{NaCl}$ and $19 \% \mathrm{MgCl}_2$ by weight of solution. The normal boiling point of the...

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In Dumas' method for estimation of nitrogen 0.4 g of an organic compound gave 60 mL of nitrogen collected at...

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The major product in the following reaction is :

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Sodium metal crystallizes in a body centred cubic lattice with unit cell edge length of 4 Å. The radius of...

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Given below are two statements: Statement I : Hyperconjugation is not a permanent effect. Statement II : In general, greater...

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What is the correct IUPAC name of

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The orbital angular momentum of an electron in 3 s orbital is $\frac{x h}{2 \pi}$. The value of $x$ is:

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The ratio of sigma and bonds present in pyrophosphoric acid is _______.

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$\mathrm{A}(\mathrm{g}) \rightarrow 2 \mathrm{~B}(\mathrm{~g})+\mathrm{C}(\mathrm{g})$ is a first order reaction. The initial pressure of the system was found to be 800...

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Match the LIST-I with LIST-II Choose the correct answer from the options given below:

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The number of incorrect statements from the following is ______

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The number of correct statements from the following is: A. $\mathrm{E}_{\text {cell }}$ is an intensive parameter. B. A negative...

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20 mL of 0.1 M NaOH is added to 50 mL of 0.1 M acetic acid solution. The pH of...

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Compounds that should not be used as primary standards in titrimetric analysis are : A. $\mathrm{Na}_2 \mathrm{Cr}_2 \mathrm{O}_7$ B. Oxalic...

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The volume of hydrogen liberated at STP by treating 2.4 g of magnesium with excess of hydrochloric acid is $\_\_\_\_$...

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The observed magnetic moment of the complex $\left[\mathrm{Mn}(\mathrm{NCS})_6\right]^{\mathrm{x}-}$ is 6.06 BM. The numerical value of x is__

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At 298 K , the standard reduction potential for $\mathrm{Cu}^{2+} / \mathrm{Cu}$ electrode is 0.34 V . Given: $...

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Consider the following statements related to temperature dependence of rate constants. Identify the correct statements. A. The Arrhenius equation holds...

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The maximum number of lone pairs of electrons on the central atom from the following species is $\_\_\_\_$ $...

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Given below are two statements: Statement I : Wet cotton clothes made of cellulose based carbohydrate takes comparatively longer time...

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The total number of intensive properties from the following is $\_\_\_\_$ Volume, Molar heat capacity, Molarity, $\mathrm{E}^\theta$ cell, Gibbs free...

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The sum of oxidation state of the metals in $\mathrm{Fe}(\mathrm{CO})_5, \mathrm{VO}^{2+}$ and $\mathrm{WO}_3$ is ______

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The correct orders among the following are Atomic radius: $\mathrm{B}

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If the formula of Borax is $\mathrm{Na}_2 \mathrm{~B}_4 \mathrm{O}_x(\mathrm{OH})_{4 n} \mathrm{zH}_2 \mathrm{O}$, then $\mathrm{x}+\mathrm{y}+\mathrm{z}=$ $\_\_\_\_$

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$\mathrm{Mg}\left(\mathrm{NO}_3\right)_2 \cdot \mathrm{XH}_2 \mathrm{O}$ and $\mathrm{Ba}\left(\mathrm{NO}_3\right)_2 \cdot \mathrm{YH}_2 \mathrm{O}$, represent formula of the crystalline forms of nitrate salts. Sum of...

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If the boiling points of two solvents X and Y (having same molecular weights) are in the ratio 2 :...

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See the following chemical reaction: $\mathrm{Cr}_2 \mathrm{O}_7^{2-}+\mathrm{XH}^{+}+6 \mathrm{Fe}^{2+} \rightarrow \mathrm{YCr}^{3+}+6 \mathrm{Fe}^{3+}+\mathrm{ZH}_2 \mathrm{O}$

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The number of possible isomeric products formed when 3-chloro-1-butene reacts with HCl through carbocation formation is _____

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Fat soluble vitamins are: A. Vitamin $B_1$ B. Vitamin C C. Vitamin E D. Vitamin $\mathrm{B}_{12}$ E. Vitamin K Choose...

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The number of correct statements from the following _____ A. For 1s orbital, the probability density is maximum at the...

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The number of species from the following carrying a single lone pair on central atom Xenon is ____ $...

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1 g of a carbonate $\left(\mathrm{M}_2 \mathrm{CO}_3\right)$ on treatment with excess HCl produces 0.01 mol of $\mathrm{CO}_2$. The molar mass...

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0.400 g of an organic compound $(\mathrm{X})$ gave 0.376 g of AgBr in Carius method for estimation of bromine. $\%$...

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Given below are two statements: Statement I : When a system containing ice in equilibrium with water (liquid) is heated,...

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The number of correct statements about modern adsorption theory of heterogeneous catalysis from the following is ____ A. The catalyst...

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Mass of magnesium required to produce 220 mL of hydrogen gas at STP on reaction with excess of dil. HCl...

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Which of the following complexes will exhibit maximum attraction to an applied magnetic field?

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For complete combustion of ethene. $\mathrm{C}_2 \mathrm{H}_4(\mathrm{~g})+3 \mathrm{O}_2(\mathrm{~g}) 2 \mathrm{CO}_2(\mathrm{~g})+2 \mathrm{H}_2 \mathrm{O}(\mathrm{l})$ the amount of heat produced as measured in...

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4.5 moles each of hydrogen and iodine is heated in a sealed ten litre vessel. At equilibrium, 3 moles of...

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he sequence from the following that would result in giving predominantly 3,4,5 Tribromoaniline is :

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The covalency and oxidation state respectively of boron in $\left[\mathrm{BF}_4\right]^{-}$, are

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In the following series of reactions identify the major products A & B respectively

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Number of compounds from the following which will not produce orange red precipitate with Benedict solution is ____. Glucose, maltose,...

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The number of atomic orbitals from the following having 5 radial nodes is ______.7s, 7p, 6s, 8p, 8d

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Match List I with List II 1-Bromopropane is reacted with reagents in List-I to give product in List-II

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If $\mathrm{Ni}^{2+}$ is replaced by $\mathrm{Pt}^{2+}$ in the complex $\left[\mathrm{NiCl}_2 \mathrm{Br}_2\right]^{2-}$, which of the following properties are expected to get...

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Coagulating value of electrolytes $\mathrm{AlCl}_3$ and NaCl for $\mathrm{As}_2 \mathrm{~S}_3$ are 0.09 and 50.04 respectively. The coagulating power of $\mathrm{AlCl}_3$...

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Identify the correct order of standard enthalpy of formation of sodium halides.

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The solubility product of $\mathrm{BaSO}_4$ is $1 \times 10^{-10}$ at 298 K . The solubility of $\mathrm{BaSO}_4$ in 0.1 $...

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10 mL of 2 M NaOH solution is added to 20 mL of 1 M HCl solution kept in a...

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Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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For electrons in '2s' and '2p' orbitals, the orbital angular momentum values, respectively are :

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A compound ‘X’ when treated with phthalic anhydride in presence of concentrated $\mathrm{H}_2 \mathrm{SO}_4$ yields ‘Y’. ‘Y’ is used as...

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What happens when methane undergoes combustion in systems A and B respectively?

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Given below are two statements: Statement I : $\mathrm{CrO}_3$ is a stronger oxidizing agent than $\mathrm{MoO}_3$ Statement II: $\mathrm{Cr}(\mathrm{VI})$ is...

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Match List I with List II. Choose the correct answer from the options given below:

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The correct group of halide ions which can be oxidized by oxygen in acidic medium is

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For a good quality cement, the ratio of lime to the total of the oxides of Si, Al and Fe...

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The magnetic moment is measured in Bohr Magneton (BM). Spin only magnetic moment of Fe in $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$ and $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$...

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Identify the diamagnetic octahedral complex ions from below ; A. $\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-}$ B. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ C. $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}$ D. $\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_3 \mathrm{~F}_3\right]$ Choose...

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Given below are two statements: Statement I: SO2 and H2¬O both possess V-shaped structure. Statement II: The bond angle of...

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The correct order of reactivity of following haloarenes towards nucleophilic substitution with aqueous NaOH is: Choose the correct answer from...

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40 mL of a mixture of $\mathrm{CH}_3 \mathrm{COOH}$ and HCl (aqueous solution) is titrated against 0.1 M NaOH solution conductometrically....

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What weight of glucose must be dissolved in 100 g of water to lower the vapour pressure by 0.20 mm...

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Match List I with List II

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Alkali metal from the following with least melting point is:

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The standard cell potential ( $\mathrm{E}_{\text {cell }}^{\ominus}$ ) of a fuel cell based on the oxidation of methanol in...

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Given below are two statements: Statement-I : In the metallurgy process, sulphide ore is converted to oxide before reduction. Statement-II...

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Which of the following are the Green house gases? A. Water vapour B. Ozone C. I2 D. Molecular hydrogen

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The descending order of acidity for the following carboxylic acid is : A. $\mathrm{CH}_3 \mathrm{COOH}$ B. $\mathrm{F}_3 \mathrm{C}-\mathrm{COOH}$ C. $\mathrm{ClCH}_2-\mathrm{COOH}$...

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A solution is prepared by adding 2g of “X” of 1 mole of water. Mass percent of “X” in the...

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The number of incorrect statement/s from the following is ______. A. The successive half-lives of zero order reactions decreases with...

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The major product for the following reaction is

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Compound from the following that will not produce precipitate on reaction with $\mathrm{AgNO}_3$ is:

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Henry Moseley studied characteristic X-ray spectra of elements. The graph which represents his observation correctly is : (Given v =...

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https://competishun.com/the-specific-conductance-of-0-0025-m-acetic-acid-is-5-times-10-5-mathrms-mathrmcm-1-at-a-certain-temperature-the-dissociation-constant-of-acetic-acid-is-____-times-10-7-nearest-integer-consider-limiting-molar-conductivity-of-mathrmch_3-mathrmcooh-as-400-mathrms-mathrmcm2-mathrmmol-1/

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One mole of $\mathrm{P}_4$ reacts with 8 moles of $\mathrm{SOCl}_2$ to give 4 moles of A , x mole of...

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Compound A from the following reaction sequence is:

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The electron in the $\mathrm{n}^{\text {th }}$ orbit of $\mathrm{Li}^{2+}$ is excited to ( $\mathrm{n}+1$ ) orbit using the radiation...

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Which one of the following pairs is an example of polar molecular solids?

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Match List-I with List-II Choose the correct answer from the options given below :-

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Given below are two statements: Statement I: Tropolone is an aromatic compound and has 8 electrons. Statement II:  electrons...

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For a metal ion, the calculated magnetic moment is 4.90 BM. This metal ion has ______ number of unpaired electrons.

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Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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An aqueous solution of volume $300 \mathrm{~cm}^3$ contains 0.63 g of protein. The osmotic pressure of the solution at 300...

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Given below are two statements: Statements I: Ethene at 333 to 343 K and $6-7 \mathrm{~atm}$ pressure in the presence...

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Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R Assertion...

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The difference in the oxidation state of Xe between the oxidised product of Xe formed on complete hydrolysis of $\mathrm{XeF}_4$...

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In Hall – Heroult process, the following is used for reducing $\mathrm{Al}_2 \mathrm{O}_3$ :-

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The number of molecules from the following which contain only two lone pair of electrons is $\_\_\_\_$ . $...

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Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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The number of endothermic process/es from the following is ______ (A) $\mathrm{I}_2(\mathrm{~g}) \rightarrow 2 \mathrm{I}(\mathrm{g})$ (B) $\mathrm{HCl}(\mathrm{g}) \rightarrow \mathrm{H}(\mathrm{g})+\mathrm{Cl}(\mathrm{g})$ (C)...

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The total number of stereoisomers for the complex $\left[\mathrm{Cr}(\mathrm{ox})_2, \mathrm{ClBr}\right]^{3-}$ (where ox $=$ oxalate) is:

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Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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Major product ‘P’ formed in the following reaction is:

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In alkaline medium, the reduction of permanganate anion involves a gain of _______ electrons.

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Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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For a chemical reaction A + B  Product, the order is 1 with respect to A and B. What...

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$\mathrm{A}(\mathrm{g}) \rightleftharpoons 2 \mathrm{~B}(\mathrm{~g})+\mathrm{C}(\mathrm{g})$ For the given reaction, if the initial pressure is 450 mm Hg and the pressure at...

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Given below are two statements related to Ellingham diagram: Statement-I: Ellingham diagrams can be constructed for formation of oxides, sulfides...

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Match List-I with List-II Choose the correct answer from the options given below :-

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Which of the following compounds is an example of Freon?

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The naturally occurring amino acid that contains only one basic functional group in its chemical structure is

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The correct order of metallic character is:

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Match List-I with List-II Choose the correct answer from the options given below:

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In the wet tests for detection of various cations by precipitation, Ba2+ cations are detected by obtaining precipitate of

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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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Match List-I with List-II Choose the correct answer from the options given below:

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Which hydride among the following is less stable?

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The major product ‘P’ formed in the given reaction is:

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The correct order for acidity of the following hydroxyl compound is: Choose the correct answer from the options given below:

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The correct order of the number of unpaired electrons in the given complexes is A. $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$ B. $\left[\mathrm{FeF}_6\right]^{3-}$

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Given below are two statements : Statement I: For a planet, if the ratio of mass of the planet to...

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The delicate balance of $\mathrm{CO}_2$ and $\mathrm{O}_2$ is NOT disturbed by:

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The statement/s which are true about antagonists from the following is/are :- A. They bind to the receptor site. B....

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Number of water molecules in washing soda and soda ash respectively are:

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The output from a NAND gate having inputs A and B given below will be.

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Which of the following can reduce decomposition of $\mathrm{H}_2 \mathrm{O}_2$ on exposure to light

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The correct reaction profile diagram for a positive catalyst reaction

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As shown in the figure, a plane mirror is fixed at a height of 50 cm from the bottom of...

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https://competishun.com/the-correct-relationship-between-unit-cell-edge-length-a-and-radius-of-sphere-r-for-facecentred-and-body-centred-cubic-structures-respectively-are/

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The decreasing order of hydride affinity for following carbocations is: Choose the correct answer from the options given below:

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The surface tension of soap solution is $3.5 \times 10^{-2} \mathrm{Nm}^{-1}$. The amount of work done required to increase the...

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The product (P) formed from the following multistep reaction is:

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A metallic cube of side 15 cm moving along y-axis at a uniform velocity of $2 \mathrm{~ms}^{-1}$. In a region...

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The reaction used for preparation of soap from fat is:

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A coil has an inductance of 2 H and resistance of $4 \Omega$. A 10 V is applied across the...

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https://competishun.com/ferric-chloride-is-applied-to-stop-bleeding-because/

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A block of mass 5 kg starting from rest pulled up on a smooth incline plane making an angle of...

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Given below are two statements:- Statement I: In redox titration, the indicators used are sensitive to change in pH of...

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In the reaction give below:

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Two identical cells each of emf 1.5 V are connected in series across a $10 \Omega$ resistance. An ideal voltmeter...

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Buna-S can be represented as

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Given below are two statements:- Statement I: Methyl orange is a weak acid. Statement II: The benzenoid form of methyl...

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A nucleus disintegrates into two nuclear parts, in such a way that ratio of their nuclear sizes is $...

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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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A circular plate is rotating in horizontal plane, about an axis passing through its center and perpendicular to the plate,...

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In the given circuit, $...

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In Carius tube, an organic compound ' $X$ ' is treated with sodium peroxide to form a mineral acid '...

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An electron is moving along the positive x-axis. If the uniform magnetic field is applied parallel to the negative z-axis....

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Arrange the following gases in increasing order of van der Waals constant ‘a’ A. Ar B. CH4 C. H2O D....

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An electron is allowed to move with constant velocity along the axis of current carrying straight solenoid. A. The electron...

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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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Given below are two statements one is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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Incorrect method of preparation for alcohols from the following is:

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The correct IUPAC nomenclature for the following compound is

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When vector is subtracted from vector B, it gives a vector equal to 2 . Then the magnitude of vector...

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Number of crystal systems from the following where body centred unit cell can be found, is ____ Cubic, tetragonal, orthorhombic,...

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The current flowing through R2 is:

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Number of isomeric aromatic amines with molecular formula $\mathrm{C}_8 \mathrm{H}_{11} \mathrm{~N}$, which can be synthesized by Gabriel Pathalimide synthesis is...

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Among the following the number of compounds which will be give positive iodoform reaction is ____. (a) 1-Phenylbutan-2-one (b) 2-Methylbutan-2-o1...

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The root mean square speed of molecules of nitrogen gas at $27^{\circ} \mathrm{C}$ is approximately: (Given mass of a nitrogen...

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Which of these reactions is not a part of breakdown of ozone in stratosphere?

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Consider the following data

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The energy of He+ ion in its first excited state is. (The ground state energy for the Hydrogen atom is...

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The number of species having a square planar shape from the following is _____.

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The thermodynamic process, in which internal energy of the system remains constant is

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Which of the following have same number of significant figures? (A) 0.00253 (B) 1.0003 (C) 15.0 (D) 163 Choose the...

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The number of colloidal systems from the following, which will have 'liquid' as the dispersion medium, is ______ Gem stones,...

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The ratio of the de-Broglie wavelengths of proton and electron having same kinetic energy: (Assume mp = me × 1849)

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The standard reduction potential at 298 K for the following half cells are given below: $$ \mathrm{NO}_3^{-}+4 \mathrm{H}^{+}+3 \mathrm{e}^{-} \rightarrow...

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A spaceship of mass $2 \times 10^4 \mathrm{~kg}$ is launched into a circular orbit close to the earth surface. The...

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https://competishun.com/consider-the-following-pairs-of-solution-which-will-be-isotonic-at-the-same-temperature-the-number-of-pairs-of-solutions-is-are/

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When one light ray is reflected from a plane mirror with 30° angle of reflection, the angle of deviation of...

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The equilibrium composition for the reaction $\mathrm{PCl}_3+\mathrm{Cl}_2 \rightleftharpoons \mathrm{PCl}_5$ at 298 K is given below: $$ \begin{aligned} & {\left[\mathrm{PCl}_3\right]_{\mathrm{leq}}=0.2 \mathrm{~mol}...

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In an ice crystal, each water molecule is hydrogen bonded to ……... neighbouring molecules.

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Value of work function $\left(\mathrm{W}_0\right)$ for a few metals are given below: The number of metals which will show photoelectric...

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If the radius of the first orbit of hydrogen atom $\mathbf{a}_0$, then de-Broglie's wavelength of electron in $3^{\text {rd }}$...

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Which one of the following elements will remain as liquid inside pure boiling water?

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The reaction $2 \mathrm{NO}+\mathrm{Br}_2 \rightarrow 2 \mathrm{NOBr}$ takes places through the mechanism given below: $\mathrm{NO}+\mathrm{Br}_2 \Leftrightarrow \mathrm{NOBr}_2$ (fast) $...

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In the following reaction ‘B’ is

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The group of chemicals used as pesticide is

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At 600K, the root mean square (rms) speed of gas X (molar mass = 40) is equal to the most...

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The value of x in compound ‘D’ is ___.

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If V is the gravitational potential due to sphere of uniform density on it’s surface, then it’s value at the...

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80 mole percent of MgCl2 is dissociated in aqueous solution. The vapour pressure of 1.0 molal aqueous solution of $\mathrm{MgCl}_2$...

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The volume of 0.02 M aqueous HBr required to neutralize 10.0 mL of 0.01 M aqueous $\mathrm{Ba}(\mathrm{OH})_2$ is (Assume complete...

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Given below are two statements-

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Three organic compounds A, B and C were allowed to run in thin layer chromatography using hexane and gave the...

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From the figure of column chromatography given below, identify incorrect statements

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In satellite communication, the uplink frequency band used is:

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Formation of which complex, among the following, is not a confirmatory test of $\mathrm{Pb}^{2+}$ ions

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Find out the major product from the following reaction

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A capacitor of capacitance C is charged to a potential V. The flux of the electric field through a closed...

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During the reaction of permanganate with thiosulphate, the change in oxidation of manganese occurs by value of 3. Identify which...

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A plane electromagnetic wave of frequency 20 MHz propagates in free space along x-direction. At a particular space and time,...

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Consider the following reaction that goes from A to B in three steps as shown below:- Choose the correct

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Eight equal drops of water are falling through air with a steady speed of 10 cm/s. If the drops coalesce,...

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Group-13 elements react with $\mathrm{O}_2$ in amorphous form to form oxides of type $\mathrm{M}_2 \mathrm{O}_3(\mathrm{M}=$ element $)$. Which among the...

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The strongest acid from the following is

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Structure of $\mathrm{BeCl}_2$ in solid state, vapour phase and at very high temperature respectively are :-

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Element not present in Nessler's reagent is-

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Match List-I with List-II Choose the correct answer from the options given below:-

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The IUPAC name of $\mathrm{K}_3\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]$ is-

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Ion having highest hydration enthalpy among the given alkaline earth metal ions is-

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Three organic compounds A, B and C were allowed to run in thin layer chromatography using hexane and gave the...

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Amongst the following, the number of species having the linear shape is ____. $...

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If the CFSE of $\left[\mathrm{Ti}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$ is $-96.0 \mathrm{~kJ} / \mathrm{ml}$, this complex will absorb maximum at wavelength ___ nm.(nearest...

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The mass of NH3 produced when 131.8 kg of cyclohexanecarbaldehyde undergoes Tollen's test is ____ kg. (Nearest Integer) Molar Mass...

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In Dumas method for the estimation of $\mathrm{N}_2$, the sample is heated with copper oxide and the gas evolved is...

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The trajectory of projectile, projected from the ground is given by $y=x-\frac{x^2}{20}$. Where $x$ and $y$ are measured in meter....

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One mole of an ideal gas at 350K is in a 2.0 L vessel of thermally conducting walls, which are...

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Which of the following elements have half-filled f-orbitals in their ground state ? (Given : atomic number Sm = 62;...

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The major product ‘P’ formed in the following sequence of reaction is

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A metal M crystallizes into two lattices:- face centred cubic (fee) and body centred cubic (fcc) with unit cell edge...

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Which one of the following statements is incorrect ?

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The spin only magnetic moment of $\left[\mathrm{Mn}\left(\mathrm{H}_2 \mathrm{O}\right)_8\right]^{2+}$ complexes is $\_\_\_\_$ B.M. (Nearest integer) (Given : Atomic no. of Mn...

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Match List I with List II Choose the correct answer from the options given below

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Testosterone, which is a steroidal hormone, has the following structure The total number of asymmetric carbon atom/s in testosterone is_______

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An organic compound $[\mathrm{A}]\left(\mathrm{C}_4 \mathrm{H}_{11} \mathrm{~N}\right)$, shows optical activity and gives $\mathrm{N}_2$ gas on treatment with $\mathrm{HNO}_2$. The compound [A]...

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$1 \times 10^{-5} \mathrm{M} \mathrm{AgNO}_3$ is added to 1 L of saturated solution of AgBr . The conductivity of this...

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Given below are two statements: Statement I: Boron is extremely hard indicating its high lattice energy Statement II: Boron has...

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$20 \%$ of acetic acid is dissociated when its 5 g is added to 500 mL of water. The depression...

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The number of incorrect statement/s from the following is/are $\_\_\_\_$ A. Water vapours are adsorbed by anhydrous calcium chloride. B....

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When a hydrocarbon A undergoes complete combustion it requires 11 equivalents of oxygen and produces 4 equivalents of water. What...

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$A \rightarrow B$ The above reaction is of zero order. Half life of this reaction is 50 min. The time...

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The electrode potential of the following half cell at 298 K . $\mathrm{X}\left|\mathrm{X}^{2+}(0.001 \mathrm{M})\right|\left|\mathrm{Y}^{2+}(0.01 \mathrm{M})\right| \mathrm{Y}$ is $\_\_\_\_$ $...

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A first order reaction has the rate constant, $\mathrm{k}=4.6 \times 10^{-3} \mathrm{~s}^{-1}$. The number of correct statement/s from the following...

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Among the following, the number of tranquilizer/s is/are _________.

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The volume of HCl , containing $73 \mathrm{~g} \mathrm{~L}^{-1}$, required to completely neutralise NaOH obtained by reacting 0.69 g of...

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The strength of 50 volume solution of hydrogen peroxide is $\_\_\_\_$ $\mathrm{g} / \mathrm{L}$ (Nearest integer). Given: Molar mass of...

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The normal rain water is slightly acidic and its pH value is 5.6 because of which one of the following...

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The equilibrium constant for the reaction $\mathrm{Zn}(\mathrm{s})+\mathrm{Sn}^{2+}(\mathrm{aq}) \rightleftharpoons \mathrm{Zn}^{2+}(\mathrm{aq})+\mathrm{Sn}(\mathrm{s})$ is $1 \times 10^{20}$ at 298 K . The magnitude of...

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Based on the given figure, the number of correct statement/s is/are _______ A. Surface tension is the outcome of equal...

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A short peptide on complete hydrolysis produces 3 moles of glycine (G), two moles of leucine (L) and two moles...

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Number of compounds from the following which will not dissolve in cold $\mathrm{NaHCO}_3$ and NaOH solutions but will dissolve in...

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Assume that the radius of the first Bohr orbit of hydrogen atom is $0.6 \AA$. The radius of the third...

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0.3 g of ethane undergoes combustion at $27^{\circ} \mathrm{C}$ in a bomb calorimeter. The temperature of calorimeter system (including the...

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The graph of $\log \frac{x}{m}$ vs $\log p$ for an adsorption process is a straight line inclined at an angle...

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$\mathrm{Pt}(\mathrm{s}) \mathrm{H}_2(\mathrm{~g})(1 \mathrm{bar})\left|\mathrm{H}^{+}(\mathrm{aq})(1 \mathrm{M})\right|\left|\mathrm{M}^{3+}(\mathrm{aq}), \mathrm{M}^{+}(\mathrm{aq})\right| \mathrm{Pt}(\mathrm{s})$ $$ \text { The Ecell for the given cell is } 0.1115 \mathrm{~V} \text...

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Consider the following equation : $$ 2 \mathrm{SO}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{SO}_3(\mathrm{~g}), \Delta \mathrm{H}=-190 \mathrm{~kJ} $$ The number of factors which...

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The denticity of the ligand present in the Fehling's reagent is_______.

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The element playing significant role in neuromuscular function and interneuronal transmission is :

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The bond order and magnetic property of acetylide ion are same as that of

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Number of hydrogen atoms per molecule of a hydrocarbon A having 85.8% carbon is _________ (Given : Molar mass of...

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$\mathrm{O}-\mathrm{O}$ bond length in $\mathrm{H}_2 \mathrm{O}_2$ is $X$ than the $\mathrm{O}-\mathrm{O}$ bond length in $\mathrm{F}_2 \mathrm{O}_2$. The $\mathrm{O}-\mathrm{H}$ bond length...

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When 0.01 mol of an organic compound containing $60 \%$ carbon was burnt completely, 4.4 g of CO2was produced. The...

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)...

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For electron gain enthalpies of the elements denoted as $\Delta_{\mathrm{eq}} \mathrm{H}$, the incorrect option is:

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Correct statements for the given reaction are: A. Compound 'B' is aromatic B. The completion of above reaction is very...

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Lead storage battery contains $38 \%$ by weight solution of $\mathrm{H}_2 \mathrm{SO}_4$. The van't Hoff factor is 2.67 at this...

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Total number of acidic oxides among $\mathrm{N}_2 \mathrm{O}_3, \mathrm{NO}_2, \mathrm{~N}_2 \mathrm{O}, \mathrm{Cl}_2 \mathrm{O}_7, \mathrm{SO}_2, \mathrm{CO}, \mathrm{CaO}, \mathrm{Na}_2 \mathrm{O}$ and NO...

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Total number of moles of AgCl precipitated on addition of excess of $\mathrm{AgNO}_3$ to one mole each of the following...

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For conversion of compound $\mathrm{A} \rightarrow \mathrm{B}$, the rate constant of the reaction was found to be $...

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2-hexene $\xrightarrow[\text { (ii) } \mathrm{H}_3 \mathrm{O}]{\text { (i) } \mathrm{O}_3}$ Products The two products formed in above reaction are...

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Which one of the following sets of ions represents a collection of isoelectronic species? (Given : Atomic Number : $...

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An organic compound undergoes first order decomposition. If the time taken for the 60% decomposition is 540 s, then the...

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A. During charging of battery, PbSO4 on anode is converted into $\mathrm{PbO}_2$ . B. During charging of battery, PbSO4 on...

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On heating, $\mathrm{LiNO}_3$ gives how many compounds among the following? $\mathrm{Li}_2 \mathrm{O}, \mathrm{N}_2, \mathrm{O}_2, \mathrm{LiNO}_2, \mathrm{NO}_2 \mid$

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Iron oxide FeO , crystallises in a cubic lattice with a unit cell edge length of 5.0 A . If...

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Match List I with List II. Choose the correct answer from the options given below :

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1 mole of ideal gas is allowed to expand reversibly and adiabatically from a temperature of $27^{\circ} \mathrm{C}$. The work...

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28.0 L of $\mathrm{CO}_2$ is produced on complete combustion of 16.8 L gaseous mixture of ethane and methane at $...

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$1 \mathrm{~L}, 0.02 \mathrm{M}$ solution of $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{SO}_4\right] \mathrm{Br}$ is mixed with $1 \mathrm{~L}, 0.02 \mathrm{M}$ solution of $...

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Match List I with List II

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In figure, a straight line is given for Freundrich Adsorption $(y=3 x+2.505)$. The value of $\frac{1}{n}$ and $\log K$ are...

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Formulae for Nessler's reagent is:

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Given below are two statements: Statement I : Nickel is being used as the catalyst for producing syn gas and...

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The number of pairs of the solution having the same value of the osmotic pressure from the following is ________....

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The starting material for convenient preparation of deuterated hydrogen peroxide $\left(\mathrm{D}_2 \mathrm{O}_2\right)$ in laboratory is:

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Match List–I with List–II Choose the correct answer from the options given below :

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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Given below are two statements: Statement I: During Electrolytic refining, the pure metal is made to act as anode and...

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Number of compounds giving (i) red colouration with ceric ammonium nitrate and also (ii) positive iodoform test from the following...

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Which of the following relations are correct? Choose the most appropriate answer from the options given below :

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The structures of major products A, B and C in the following reaction are sequence

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Boric acid in solid, whereas $\mathrm{BF}_3$ is gas at room temperature because of

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The Lewis acid character of boron tri halides follows the order:

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Match List I with List II:

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The industrial activity held least responsible for global warming is :

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The number of given orbitals which have electron density along the axis is _______ px, py, pz, dxy, dyz dxz,

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Arrange the following orbitals in decreasing order of energy ? (A) n = 3, l = 0, m = 0...

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Reaction of propanamide with $\mathrm{Br}_2 / \mathrm{KOH}(\mathrm{ag})$ produces:

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The water quality of a pond was analysed and its BOD was found to be 4. The pond has

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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion...

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A chloride salt solution acidified with dil. $\mathrm{HNO}_3$ gives a curdy white precipitate, $[A]$, on addition of $\mathrm{AgNO}_3$. $[\mathrm{A}]$ on...

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Bond dissociation energy of $\mathrm{E}-\mathrm{H}$ bond of the " $\mathrm{H}_2 \mathrm{E}$ " hydrides of group 16 elements (given below), follows...

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Compound $\mathrm{A}, \mathrm{C}_5 \mathrm{H}_{10} \mathrm{O}_5$, given a tetraacetate with $\mathrm{Ac}_2 \mathrm{O}$ and oxidation of A with $\mathrm{Br}_2-\mathrm{H}_2 \mathrm{O}$ gives an...

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Which element is not present in Nessler's reagent ?

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The concentration of dissolved Oxygen in water for growth of fish should be more than ppm and Biochemical Oxygen Demand...

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$\mathrm{KMnO}_4$ oxidises I- in acidic and neutral/faintly alkaline solution, respectively to

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Following figure shows spectrum of an ideal black body at four different temperatures. The number of correct statement/s from the...

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The isomeric deuterated bromide with molecular formula C4H8DBr having two chiral carbon atoms is

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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Evaluate the following statements for their correctness. (A) The elevation in boiling point temperature of water will be same for...

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A solution of $\mathrm{CrO}_5$ in amyl alcohol has a $\_\_\_\_$ colour

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‘A’ in the given reaction is

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If the pKa of lactic acid is 5 , then the pH of 0.005 M calcium lactate solution at $...

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Given below are two statements : Statement I : Sulphanilic acid gives esterification test for carboxyl group. Statement II :...

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The wave function $(\Psi)$ of 2 s is given by $$ \Psi_{2 s}=\frac{1}{2 \sqrt{2 \pi}}\left(\frac{1}{a_0}\right)^{1 / 2}\left(2-\frac{r}{a_0}\right) e^{-r / 2...

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Given below are two statements : Statement I: Upon heating a borax bead dipped in cupric sulphate in a luminous...

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According to MO theory the bond orders for $\mathrm{O}_2^{2-} . \mathrm{CO}$ and $\mathrm{NO}^{+}$respectivelv, are

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One mole of an ideal monoatomic gas is subjected to changes as shown in the graph. The magnitude of the...

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Find out the major product from the following reaction.

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The complex cation which has two isomers is :

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Given below are two statements : One is labelled as Assertion A and the other labelled as Reason R. Assertion...

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Find out the major products from the following reaction sequence.

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Cyclohexylamine when treated with nitrous acid yields (P). On treating (P) with PCC results in (Q). When (Q) is heated...

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Chlorides of which metal are soluble in organic solvents:

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The Total pressure observed by mixing two liquid A and B is 350 mm Hg when their mole fractions are...

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Match List I with List II

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Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. In...

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A hydrocarbon 'X' with formula $\mathrm{C}_6 \mathrm{H}_8$ uses two moles of $\mathrm{H}_2$ on catalytic hydrogenation of its one mole. On...

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When the hydrogen ion concentration [H+] changes by a factor of 1000, the value of pH of the solution _______.

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When a hydrocarbon A undergoes combustion in the presence of air, it requires 9.5 equivalents of oxygen and produces 3...

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The graph which represents the following reaction is : $\left(\mathrm{C}_6 \mathrm{H}_5\right)_3 \mathrm{C}-\mathrm{Cl} \xrightarrow[\text { Pyyidine }]{\mathrm{OH}^{-}}\left(\mathrm{C}_6 \mathrm{H}_5\right)_3 \mathrm{C}-\mathrm{OH}$

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The $\mathrm{Cl}-\mathrm{Co}-\mathrm{Cl}$ bond angle values in a fac $-\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}_3\right]$ complex is/are:

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Which of the following compounds are not used as disinfectants? (A) Chloroxylenol (B) Bithional (C) Veronal (D) Prontosil (E) Terpineol...

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Total number of tripeptides possible by mixing of valine and proline is _________

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Potassium dichromate acts as a strong oxidizing agent in acidic solution. During this process, the oxidation state changes from

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Match List I with List II:

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The one giving maximum number of isomeric alkenes on dehydrohalogenation reaction is (excluding rearrangement)

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All structures given below are of vitamin C. Most stable of them is :

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Maximum number of isomeric monochloro derivatives which can be obtained from 2, 2, 5, 5-tetramethylhexane by chlorination is _______

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Incorrect statement for the use of indicators in acid–base titration is : (1) Methyl orange may be used for a...

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Find out the major product for the following reaction.

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The correct order of bond enthalpy ( $\mathrm{kJ} \mathrm{mol}^{-1}$ ) is :

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Maximum number of electrons that can be accommodated in shell with n = 4 are:

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Sum of $\pi$-bonds present in peroxodisulphuric acid and pyrosulphuric acid is

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In the following halogenated organic compounds the one with maximum number of chlorine atoms in its structure is :

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In the above conversion of compound (X) to product (Y), the sequence of reagents to be used will be:

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The number of statement/s which are the characteristics of physisorption is ___________. A. It is highly specific in nature B....

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In a reaction reagents 'X' and 'Y' respectively are

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A doctor prescribed the drug Equanil to a patient. The patient was likely to have symptoms of which disease?

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$\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ paper acidified with dilute $\mathrm{H}_2 \mathrm{SO}_4$ turns green when exposed to

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Match List I with List II

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The hybridization and magnetic behaviour of cobalt ion in $\left.\left[\mathrm{Co}\left(\mathrm{NH}_3\right)\right]^3\right]^{3+}$ complex, respectively is

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An indicator ' $x$ ' is used for studying the effect of variation in concentration of iodide on the rate...

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Decreasing order towards SN1 reaction for the following compounds is:

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Match List I with List II.

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Identify the correct statements about alkali metals. A. The order of standard reduction potential ( $\mathrm{M}^{+} \mid \mathrm{M}$ ) for...

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The correct order of $\mathrm{pK}_{\mathrm{a}}$ values for the following compounds is:

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Match List–I and List–II. Choose the correct answer from the options given below:

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Which one among the following metals is the weakest reducing agent ?

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The most stable carbocation for the following is:

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Choose the correct colour of the product for the following reaction.

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Match List I with List II

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Which will undergo deprotonation most readily in basic medium?

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Which of the following reaction is correct ?

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The set of correct statements is: (i) Manganese exhibits +7 oxidation state in its oxide. (ii) Ruthenium and Osmium exhibit...

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Given below are two statements : Statement I : Pure Aniline and other arylamines are usually colourless. Statement II :...

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A. Ammonium salts produce haze in atmosphere. B. Ozone gets produced when atmospheric oxygen reacts with chlorine radicals. C. Polychlorinated...

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Correct statement is :

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Match List–I and List–II. Choose the correct answer from the options given below:

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Find out the major products from the following reactions.

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Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R Assertion...

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30.4 kJ of heat is required to melt one mole of sodium chloride and the entropy change at the melting...

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Choose the correct representation of conductometric titration of benzoic acid vs sodium hydroxide.

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The number of correct statements from the following is ____ (A) Conductivity always decreases with decrease in concentration for both...

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Correct order of spin only magnetic moment of the following complex ions is: (Given At. No. Fe: 26, Co:27)

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Statement 1 : Dipole moment is a vector quantity and by convention it is depicted by a small arrow with...

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Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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For a reversible reaction $\mathrm{A} \rightleftharpoons \mathrm{B}$, the $\Delta \mathrm{H}_{\text {forward reaction }}=20 \mathrm{~kJ} \mathrm{~mol}^{-1}$. The activation energy of the...

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Match List I with List II Choose the correct answer from the options given below:

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20 mL of 0.5 M NaCl is required to coagulate 200 mL of $\mathrm{AS}_2 \mathrm{~S}_3$ solution in 2 hours. The...

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What is the mass ratio of ethylene glycol (C2H6O2, molar mass = 62 g/mol) required for making 500 g of...

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Given below are two statements: Statement I : The decrease in first ionization enthalpy from B to Al is much...

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Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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The vapour pressure of $30 \%(\mathrm{w} / \mathrm{v})$ aqueous solution of glucose is $\_\_\_\_$ mm Hg at $25^{\circ} \mathrm{C}$. [Given:...

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Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R Assertion...

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The total number of isoelectronic species from the given set is ____. $...

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Given below are two statements : In the light of the above statements, choose the correct answer from the options...

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In Chromyl chloride, the oxidation state of chromium is (+) ____.

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Which of the following represents the correct order of metallic character of the given elements ?

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The total change in the oxidation state of manganese involved in the reaction of $\mathrm{KMnO}_4$ and potassium iodide in the...

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Given below are two statements :- Statement I: In froth floatation method a rotating paddle agitates the mixture to drive...

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In which of the following reactions the hydrogen peroxide acts as a reducing agent?

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The volume (in mL ) of $0.1 \mathrm{M} \mathrm{AgNO}_3$ required for complete precipitation of chloride ions present in 20 mL...

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Match List I with List II

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The number of s-electrons present in an ion with 55 protons in its unipositive state is

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A student has studied the decomposition of a gas AB 3 at $25^{\circ} \mathrm{C}$. He obtained the following data. The...

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A metal surface of 100 cm2 area has to be coated with nickel layer of thickness 0.001 mm. A current...

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KMnO4 is titrated with ferrous ammonium sulphate hexahydrate in presence of dilute H2SO4. Number of water molecules produced for 2...

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Which of the following cannot be explained by crystal field theory?

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Among the following compounds, the one which shows highest dipole moment is

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$t_{87.5}$ is the time required for the reaction to undergo $87.5 \%$ completion and $t_{50}$ is the time required for...

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What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species : $...

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Which one amongst the following are good oxidizing agents? Choose the most appropriate answer from the options given below :

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A certain quantity of real gas occupies a volume of 0.15 dm3 at 100 atm and 500 K when its...

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20 mL of calcium hydroxide was consumed when it was reacted with 10 mL of unknown solution of H2SO4. Also...

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The homoleptic and octahedral complex of $\mathrm{Co}^{2+}$ and $\mathrm{H}_2 \mathrm{O}$ has $\_\_\_\_$ unpaired electron(s) in the $t_{2 g}$ set of...

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An organic compound gives 0.220 g of CO2 and 0.126 g of H2O on complete combustion. If the % of...

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Which of the following expressions is correct in case of a CsCI unit cell (edge length'a')?

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The complex with highest magnitude of crystal field splitting energy $\left(\Delta_0\right)$ is

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The sum of lone pairs present on the central atom of the interhalogen $\mathrm{IF}_5$ and $\mathrm{IF}_7$ is ______.

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A2 + B2  2AB. kJ mol–1 AB, A2 and B2 are diatomic molecule. If the bond enthalpies of A2,...

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25.0 mL of 0.050 M Ba(NO3)2 is mixed with 25.0 mL of 0.020 M NaF. Ksp of BaF2 is 0.5...

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Solution of 12 g of non-electrolyte (A) prepared by dissolving it in 1000 mL of water exerts the same osmotic...

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For the given reaction The total number of possible products formed by tertiary carbocation of A is ____.

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In potassium ferrocyanide, there are ____ pairs of electrons in the $\mathrm{t}_{2 \mathrm{~g}}$ set of orbitals

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If the degree of dissociation of aqueous solution of weak monobasic acid is determined to be 0.3, then the observed...

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The pair of lanthanides in which both elements have high third -ionization energy is:

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What happens when a lyophilic sol is added to a lyophobic sol?

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In an electrochemical reaction of lead, at standard temperature, if $\mathrm{E}_{\left(\mathrm{Pb}^{2+} / \mathrm{Pb}\right)}^0=\mathrm{m}$ Volt and $\mathrm{E}_{\left(\mathrm{Pb}^{4+} / \mathrm{Pb}\right)}^0=\mathrm{n}$ Volt, then...

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$\mathrm{FeO}_4^{2-} \xrightarrow{+2.2 \mathrm{~V}} \mathrm{Fe}^{3+} \xrightarrow{+0.70} \mathrm{Fe}^{2+} \xrightarrow{-0.45} \mathrm{Fe}^0$ $\mathrm{E}_{\mathrm{FeO}_4^{2-} / \mathrm{Fe}^{2+}}^\theta$ is $\mathrm{x} \times 10^{-3} \mathrm{~V}$ The value of x...

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The energy of an electron in the first Bohr orbit of hydrogen atom is –2.18×10–18 J. Its energy in the...

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The major product formed in the Friedel-Craft acylation of chlorobenzene is .

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$0.004 \mathrm{M} \mathrm{K}_2 \mathrm{SO}_4$ solution is isotonic with 0.01 M glucose solution. Percentage dissociation of $\mathrm{K}_2 \mathrm{SO}_4$ is $\_\_\_\_$ (Nearest...

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Which of the following statements are not correct? A. The electron gain enthalpy of F is more negative than that...

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In the following reactions, the total number of oxygen atoms in X and Y is ______ $...

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A solution of sugar is obtained by mixing 200 g of its 25% solution and 500 g of its 40%...

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In the reaction given below:

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The number of incorrect statement/s about the black body from the following is _______ (A) Emit or absorb energy in...

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Solid fuel used in rocket is a mixture of $\mathrm{Fe}_2 \mathrm{O}_3$ and Al (in ratio 122 ). The heat evolved...

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Be (OH)2 react with Sr(OH)2 to yield an ionic salt. [JEE (Main) 13-4-23_S1] [SB_M] M0derate Choose the incorrect option related...

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CIF5 at room temperature is a:

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The number of hyperconjugation structures involved to stabilize carbocation formed in the above reaction is _____.

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The ratio x/y on completion of the above reaction is ____.

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Which one of the following is most likely a mismatch?

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An atomic substance A of molar mass $12 \mathrm{~g} \mathrm{~mol}^{-1}$ has a cubic crystal structure with edge length of 300...

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The ratio of spin-only magnetic moment values

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D-(+)-Glyceraldehyde $$ \text { D-(+)-Glyceraldehyde } \xrightarrow[\text { (ii) } \mathrm{H}_2 \mathrm{O} / \mathrm{H}^{+}]{\text {(i) } \mathrm{HCN}} $$ (iii) $\mathrm{HNO}_3$...

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A mixture of 1 mole of $\mathrm{H}_2 \mathrm{O}$ and 1 mole of CO is taken in a 10 litre container...

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Which of the following statement is correct for paper chromatography?

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2-Methyl propyl bromide reacts with C2H5O– and gives 'A' whereas on reaction with C2H5OH it gives 'B'. The mechanism followed...

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In the following reaction ‘X’ is $...

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For a good quality cement, the ratio of silica to alumina is found to be

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The complex

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The radical which mainly causes ozone depletion in the presence of UV radiations is:

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During water-gas shift reaction

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In the above reaction. Left hand side and right hand side rings are named as 'A' and 'B' respectively. They...

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Arrange the following compounds in increasing order of rate of aromatic electrophilic substitution reaction

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Which is not true for arginine?

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Given below are two statements: Statement I: If BOD is 4 ppm and dissolved oxygen is 8 ppm, then it...

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Match the following

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Given below are two statements: [JEE (Main) 11-4-23_S1] [PB (N&O)_E] Ea$...

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Among the following compounds, the one which shows highest dipole moment is

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major product 'A' formed in the above reaction is

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Which of the following complex has a possibility to exist as meridional isomer?

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Thin layer chromatography of a mixture shows the following observation:

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Among the following compounds, the one which shows highest dipole moment is

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Match List-I with List-II:

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In the extraction process of copper, the product obtained after carrying out the reactions

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For compound having the formula GaAICI4, the correct option from the following is

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Match List-I with List-II: [JEE (Main) 11-4-23_S1] [CB_E] Ea$...

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In the above conversion the correct sequence of reagents to be added is

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Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion...

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Which of the following statement(s) is/are correct? (A) The pH of $1 \times 10^{-8} \mathrm{M} \mathrm{HCl}$ solution is 8 ....

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Decreasing order of reactivity towards electrophilie substitution for the following compounds is :

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Given below are two statements: Statement-I Permutit process is more efficient compared to the synthetic resin method for the softening...

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Given below are two statements Statement-I: According to Bohr's model of hydrogen atom, the angular momentum of an electron in...

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A metal chloride contains 55.0% of chlorine by weight. 100 mL vapours of the metal chloride at STP weigh 0.57...

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A molecule undergoes two independent first order reactions whose respective half lives are 12 min and 3 min. If both...

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Given below are two statements: Statements: $\mathrm{SbCl}_5$ is more covalent than $\mathrm{SbCl}_3$ Statements: The higher oxides of halogens also tend...

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The number of $\mathrm{P}-\mathrm{O}-\mathrm{P}$ bonds in $\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_7,\left(\mathrm{HPO}_3\right)_3$ and $\mathrm{P}_4 \mathrm{O}_{10}$ are respectively.

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Consider the following sequence of reactions:The product ‘B’ is

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The density of alkali metals is in the order

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Consider the following statements: (A) NF3 molecule has a trigonal planar structure. (B) Bond length of N2 is shorter than...

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The possibility of photochemical smog formation will be minimum at

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The product formed in the following multistep reaction is

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Match List I with List II:

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The mismatched combinations are A. Chlorophyll - Co B. Water hardness - EDTA C. Photography - $[\mathrm{Ag}(\mathrm{CN}) 2]^{-}$ D. Wilkinson...

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Given below are two statements: Statement-I Permutit process is more efficient compared to the synthetic resin method for the softening...

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In the reaction given below

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The number of following statement/s which is/are incorrect is______.

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Three bulbs are filled with CH4, CO2 and Ne as shown in the picture. The bulbs are connected through pipes...

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The titration curve of weak acid vs. strong base with phenolphthalein as indictor) is shown below. The Kphenolphthalein = 4...

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XeF4 reacts with SbF5 to form $\mathrm{XeF}_4$ reacts with $\mathrm{SbF}_5$ to form $\left[\mathrm{XeF}_{\mathrm{m}}\right]^{n+}\left[\mathrm{SbF}_{\mathrm{y}}\right]^{z-}$

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Match List I with List II Choose the correct answer from the options given below:

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The vapour pressure vs. temperature curve for a solution solvent system is shown below. The boiling point of the solvent...

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The number of bent-shaped molecule/s from the following is ______. $\mathrm{N}_3^{-}, \mathrm{NO}_2^{-}, \mathrm{I}_3^{-}, \mathrm{O}_3, \mathrm{SO}_2$

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Match List I with List II Choose the correct answer from the options given below:

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The number of given statement/s which is/are correct is____.

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The number of correct statement/s involving equilibria in physical process from the following is (A) Equilibrium is possible only in...

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When a 60 W electric heater is immersed in a gas for 100s in a constant volume container with adiabatic...

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The incorrect statement regarding the reaction given below is

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Identify the correct order of reactivity for the following pairs towards the respective mechanism Choose the correct answer from the...

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Suitable reaction condition for preparation of Methyl phenyl ether is

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The major product ‘P’ formed in the given reaction is

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The number of following factors which affect the percent covalent character of the ionic bond is____

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Molar mass of the hydrocarbon $(X)$ which on ozonolysis consumes one mole of $O_3$ per mole of $(X)$ and gives...

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The enthalpy change for the adsorption process and micelle formation respectively are

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For elements B, C, N, Li, Be, O and F the correct order of first ionization enthalpy is

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Given below are two statements: Statement I: Lithium and Magnesium do not form superoxide Statement II: The ionic radius of...

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The number of molecules and moles in 2.8375 litres of $\mathrm{O}_2$ at STP are respectively

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Where Nu = Nucleophile Find out the correct statement from the options given below for the above 2 reactions.

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Match List I with List I is reacted with reagents in List I to form products in List II.

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Given below are two statement: one is labelled as Assertion A and the other is labelled as Reason R Assertion...

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Match List I with List II Choose the correct answer from the options given below:

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The set which does not have ambidentate ligand(s) is

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Four gases A, B, C and D have critical temperatures 5.3, 33.2, 126.0 and 154.3 K respectively. For their adsorption...

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The compound which does not exist is:

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The correct order of electronegativity for given elements is:

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‘A’ and ‘B’ in the below reaction are:

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A is

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Given: (A) $2 \mathrm{CO}(\mathrm{g})+\mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{CO}_2(\mathrm{~g})$ in $\quad \Delta \mathrm{H}_1^{\ominus}=-\mathrm{x} \mathrm{kJ} \mathrm{mol}^{-1}$ (B) C (graphite) $+\mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{CO}_2(\mathrm{~g})$; $...

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Match List I with List II

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25 mL of silver nitrate solution (1 M) is added dropwise to 25 mL of potassium iodide (1.05 M) solution....

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The octahedral diamagnetic low spin complex among the following is

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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R: Assertion...

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Which halogen is known to cause the reaction given below: $2 \mathrm{Cu}^{2+}+4 \mathrm{X}^{-} \rightarrow \mathrm{Cu}_2 \mathrm{X}_2(\mathrm{~s})+\mathrm{X}_k$

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If 5 moles of $\mathrm{BaCl}_2$ is mixed with 2 moles of $\mathrm{Na}_3 \mathrm{PO}_4$, the maximum number of moles of $\mathrm{Ba}_3\left(\mathrm{PO}_4\right)_2$...

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The correct order of spin only magnetic moments for the following complex ions is

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Which of the following statements are correct? (A) The $\mathrm{M}^{3+} / \mathrm{M}^{2+}$ reduction potential for iron is greater than manganese...

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What is the purpose of adding gypsum to cement?

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For the adsorption of hydrogen on platinum, the activation energy is 30 kJ $\mathrm{mol}^{-1}$ and for the adsorption of hydrogen...

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The polymer X–consists of linear molecules and is closely packed. It is prepared in the presence of triethylaluminium and titanium...

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In chromyl chloride, the number of d-electrons present on chromium is same as in (Given atomic no. of Jii 22,...

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Given below are two reactions, involved in the commercial production of dihydrogen $\left(\mathrm{H}_2\right)$. The two reactions are carried out at...

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L-isomer of tetrose $X\left(\mathrm{C}_4 \mathrm{H}_8 \mathrm{O}_4\right)$ gives positive Schiff's test and has two chiral carbons. On acetylation. ' X '...

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Number of ambidentate ligands in a representative metal complex $\left[\mathrm{M}(\mathrm{en})(\mathrm{SCN})_4\right]$ is [en = ethylenediamine]

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Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.

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The value of log K for the reaction A ⇋ B at 298 K is____. (Nearest integer) Given: $$ \begin{aligned}...

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Mass of Urea $\left(\mathrm{NH}_2 \mathrm{CONH}_2\right)$ required to be dissolved in 1000 g of water to reduce the vapour pressure of...

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The one that does not stabilize $2^{\circ} \text { and } 3^{\circ}$ structures of proteins is

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Match List I with List II

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Given below are two statements Statement-I: Aqueous solution of $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ is preferred as a primary standard in volumetric...

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Consider the graph of Gibbs free energy G vs Extent of reaction. The number of statement/s from the following which...

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Isomeric amines with molecular formula $\mathrm{C}_8 \mathrm{H}_{11} \mathrm{~N}$ give the following tests Isomer (P) ⇒ Can be prepared by Gabriel...

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The reaction Ea$y occurs in which of the given galvanic cell. $$ \frac{1}{2} \mathrm{H}_2(\mathrm{~g})+\mathrm{AgCl}(\mathrm{~s}) \rightleftharpoons \mathrm{H}^{+}(\mathrm{aq})+\mathrm{Cl}^{-}(\mathrm{aq})+\mathrm{Ag}(\mathrm{~s}) $$...

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Match List-I with List-II Choose the correct answer from the options given below:

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Number of bromo derivatives obtained on treating ethane with excess of \mathrm{Br}_2, in diffused sunlight is…

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The pair from the following pairs having both compounds with net non-zero dipole moment is

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Which of the following complex is octahedral, diamagnetic and the most stable?

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The wavelength of an electron of kinetic energy $4.50 \times 10^{-29} \mathrm{~J}$ is $\_\_\_\_$ $\times 10^{-5} \mathrm{~m}$. (Nearest integer) Given:...

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Lime reacts exothermally with water to give A which has low solubility in water. Aqueous solution of ' $A$ '...

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For the reaction; $\mathrm{RCH}_2 \mathrm{Br}+\mathrm{I}^{-} \xrightarrow{\text { Acetone }} \mathrm{RCH}_2 \mathrm{I}+\mathrm{Br}_{\text {major }}^{-}$ The correct statement is:

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The major product formed in the following reaction is:

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Prolonged heating is avoided during the preparation of ferrous ammonium sulphate to

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For a concentrated solution of a weak electrolyte $\left(\mathrm{K}_{\text {eq }}=\right.$ equilibrium constant $) \mathrm{A}_2 \mathrm{~B}_3$ of concentration ‘c’, the...

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Using column chromatography, mixture of two compounds ‘A’ and ‘B’ was separated. ‘A’ eluted first, this indicates ‘B’ has

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The water gas on reacting with cobalt as a catalyst forms

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The major product formed in the following reaction is

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Strong reducing and oxidizing agents among the following, respectively, are

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Sulphur (S) containing amino acids from the following ar

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Match List-I with List-II Choose the correct answer from the options given below:

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Choose the halogen which is most reactive towards SN1 reaction in the given compounds (A, B, C & D) https://cdn.mathpix.com/snip/images/Yncz2qqJvofkemQ1n38mek_cPtAhdHxXY_XI_KioLLI.original.fullsize.png

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Which of the following options are correct for the reaction $2\left[\mathrm{Au}(\mathrm{CN})_2\right]^{-}(\mathrm{aq})+\mathrm{Zn}(\mathrm{s}) \rightarrow 2 \mathrm{Au}(\mathrm{s})+\left[\mathrm{Zn}(\mathrm{CN})_4\right]^{2-}{ }_{(\mathrm{aq})}$ A. Redox reaction B. Displacement...

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Which of the following represent the Freundlich adsorption isotherms?

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Match List-I with List-II Choose the correct answer from the options given below

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Match List I with List II

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The major products A and B from the following reactions are:

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Match List-I with List-II Choose the correct answer from the options given below:

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Compound P is neutral. Q gives effervescence with $\mathrm{NaHCO}_3$ while R reacts with Hinsbergs reagent to give solid soluble in...

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Given below are two statements: one is labelled as assertion and the other is labelled as reason. Assertion: Loss of...

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The setting time of Cement is increased by adding

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Which of the following metals can be extracted through alkali leaching technique?

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The possibility of photochemical smog formation is more at

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Match List-I with List-II Choose the correct answer from the options given below:

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The difference between electron gain enthalpies will be maximum between:

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Polymer used in orlon is:

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The standard electrode potential of M+/M in aqueous solution does not depend on

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Match the List-I with List-II Choose the correct answer from the options given below:

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A compound is formed by two elements X and Y. The element Y forms cubic close packed arrangement and those...

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Inert gases have positive electron gain enthalpy. Its correct order is

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The correct order in aqueous medium of basic strength in case of methyl substituted amines is :

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https://competishun.com/number-of-moles-of-agcl-formed-in-the-following-reaction-is-_____-bra-hrefhttp-competishun-com-wp-content-uploads-2026-01-raj2002-156-pngimg-srchttp-competishun-com-wp-content-uploads-2026-01-raj2002-156-300x72-png-alt-width300-height72-classalignnone-size-medium-wp-image-15243-a/

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Some amount of dichloromethane ($\mathrm{CH}_2 \mathrm{Cl}_2$) is added to 671.141 mL of chloroform ($\mathrm{CH} \mathrm{Cl}_3$) to prepare 2.6 × 10–3M...

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Uracil is base present in RNA with the following structure. % of N in uracil is ______. Given: Molar mass...

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A trisubstituted compound 'A', $C_(10)H_(12)O_2$ gives neutral $FeCl_3$ test positive. Treatment of compound 'A' with NaOH and $CH_3Br$ gives $CnH_(14)O_2$,...

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For independent process at 300 K. The number of non-spontaneous process from the following is ______.

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Identify the product formed (A and E)

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The d-electronic configuration of $\left[\mathrm{CoCl}_4\right]^{2-}$ in tetrahedral crystal field is $\mathrm{e}^{\mathrm{m}} \mathrm{t}_2{ }^{\mathrm{n}}$. Sum of ' m ' and 'number...

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When $\mathrm{Fe}_{0.93} \mathrm{O}$ is heated in presence of oxygen, it converts to $\mathrm{Fe}_2 \mathrm{O}_3$. The number of correct statement/s from...

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At 298 K , a 1 litre solution containing 10 mmol of $\mathrm{Cr}_2 \mathrm{O}_7^{2-}$ and 100 mmol of $\mathrm{Cr}^{3+}$ shows...

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The number of correct statement/s from the following is _______.

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The angular momentum for the electron in Bohr’s orbit is L. If the electron is assumed to revolve in second...

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600 mL of 0.01 M HCl is mixed with 400 mL of 0.01 M $H_2SO_4$. The pH of the mixture...

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If wavelength of the first line of the Paschen series of hydrogen atom is 720 nm, then the wavelength of...

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5 g of NaOH was dissolved in deionized water to prepare a 450 mL stock solution. What volume (in mL)...

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The dissociation constant of acetic is $\mathrm{x} \times 10^{-5}$. When 25 mL of $0.2 \mathrm{M} \mathrm{CH}_3 \mathrm{COONa}$ solution is mixed...

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Which of the following is true about freons ?

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The total pressure of a mixture of non-reacting gases X (0.6 g) and Y (0.45 g) in a vessel is...

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Given below are two statements : Statement I : Noradrenaline is a neurotransmitter Statement II : Low level of noradrenaline...

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When 2 litre of ideal gas expands isothermally into vacuum to a total volume of 6 litre, the change in...

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oxidation sate of phosphorus in hypophosphoric acid is + ________.

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Decreasing order of the hydrogen bonding in following forms of water is correctly represented by A. Liquid water B. Ice...

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How many of the transformation given below would result in aromatic amines?

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The number of electrons involved in the reduction of permanganate to manganese dioxide in acidic medium is________.

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The energy of one mole of photons of radiation of frequency $2 \times 10^{12} \mathrm{~Hz} \mathrm{in} \mathrm{J} \mathrm{mol}^{-1}$ is $\_\_\_\_$...

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For reaction : $\mathrm{SO}_2(\mathrm{~g})+\frac{1}{2} \mathrm{O}_2(\mathrm{~g}) \rightleftharpoons \mathrm{SO}_3(\mathrm{~g}), \mathrm{K}_{\mathrm{P}}=2 \times 10^{12}$ at $27^{\circ} \mathrm{C}$ and 1 atm pressure. The $\mathrm{K}_{\mathrm{c}}$ for...

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If compound A reacts with B following first order kinetics with rate constant 2.011 × $10(–3)s(–1)$. The time taken by...

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Two projectiles A and B are thrown with initial velocities of $40 \mathrm{~m} / \mathrm{s}$ and $60 \mathrm{~m} / \mathrm{s}$...

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'A' and 'B' formed in the following set of reactions are :

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A solution containing 2 g of a non-volatile solute in 20 g of water boils at 373.52 K. The molecular...

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Zinc reacts with hydrochloric acid to give hydrogen and zinc chloride. The volume of hydrogen gas produced at STP from...

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Reaction of BeQ with ammonia and hydrogen fluoride gives 'A' which on thermal decomposition gives $\mathrm{BeF}_2$ and $\mathrm{NH}_4 \mathrm{~F}$. What...

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A 300 mL bottle of soft drink has 0.2 M $CO_2$ dissolved in it. Assuming $CO_2$ behaves as an ideal...

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At $27^{\circ} \mathrm{C}$, a solution containing 2.5 g of solute in 250.0 mL of solution exerts an osmotic pressure of...

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Statement I: For colloidal particles, the values of colligative properties are of small order as compared to values shown by...

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On complete combustion, 0.492 g of an organic compound gave 0.792 g of $CO2$. The % of carbon in the...

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The enthalpy change for the conversion of $\frac{1}{2} \mathrm{Cl}_2(\mathrm{~g})$ to $\mathrm{Cl}^{-}(\mathrm{aq})$ is (-) $\_\_\_\_$ $\mathrm{kJ} \mathrm{mol}^{-1}$ (Nearest integer) Given: $...

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$$ A \rightarrow B $$ The rate constants of the above reaction at 200 K and 300 K are $...

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Match List I with List II. Choose the correct answer from the options given below :

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The logarithm of equilibrium constant for the reaction $\mathrm{Pd}^{2+}+4 \mathrm{Cl} \rightleftharpoons \mathrm{PdCl}_4^{2-}$ is $\_\_\_\_$ (Nearest integer) Given: $...

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Which one of the following statements is correct for electrolysis of brine solution?

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25 mL of an aqueous solution of KCl was found to require 20 mL of $1 \mathrm{M} \mathrm{AgNO}_3$ solution when...

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An organic compound 'A' with empirical formula $\mathrm{C}_6 \mathrm{H}_6 \mathrm{O}$ gives sooty flame on burning. Its reaction with bromine solution...

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At 25°C, the enthalpy of the following processes are given: $...

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Adding surfactants in non polar solvent, the micelles structure will look like

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A and B are two substances undergoing radioactive decay in a container. The half life of A is 15 min...

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'R' formed in the following sequence of reaction is:

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Choose the correct set of reagents for the following conversion trans $\left(\mathrm{Ph}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_3\right) \rightarrow$ cis $\left(\mathrm{Ph}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_3\right)$

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A physical quantity P is given as The percentage error in the measurement of a, b, c and d are...

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Number of isomeric compounds with molecular formula$\mathrm{C}_9 \mathrm{H}_{10} \mathrm{O}$ which (i) do not dissolve in NaOH (ii) do not dissolve...

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An ammoniacal metal salt solution gives a brilliant red precipitate on addition of dimethylglyoxime. The metal ion is :

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Match List I with List IIChoose the correct answer from the options given below :

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At what pH, given half cell $\mathrm{MnO}_4^{-}(0.1 \mathrm{M}) \mid \mathrm{Mn}^{2+}(0.001 \mathrm{M})$ will have electrode potential of 1.282 V? _______ (Nearest...

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Sum of oxidation states of bromine in bromic acid and perbromic acid is _______.

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Consider the cell $$ \mathrm{Pt}_{(\mathrm{s})}\left|\mathrm{H}_2(\mathrm{~g}, 1 \mathrm{~atm})\right| \mathrm{H}^{+}(\mathrm{aq}, 1 \mathrm{M})| | \mathrm{Fe}^{3+}(\mathrm{aq}), \mathrm{Fe}^{2+}(\mathrm{aq}) \mid \mathrm{Pt}(\mathrm{~s}) $$ When the potential of...

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17 mg of a hydrocarbon (M.F. C10H16) takes up 8.40 mL of the H2 gas measured at 0ºC and 760...

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Which of the following artificial sweeteners has the highest sweetness value in comparison to cane sugar?

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Electrons in a cathode ray tube have been emitted with a velocity of $1000 \mathrm{~ms}^{-1}$. The number of following statements...

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Following chromatogram was developed by adsorption of compound ‘A’ on a 6 cm TLC glass plate. Retardation factor of the...

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Consider the cell $ \operatorname{Pt}(\mathrm{s})|\mathrm{H}(\mathrm{~s})(1 \mathrm{~atm})| \mathrm{H}^{+}\left(\mathrm{aq},\left[\mathrm{H}^{+}\right]=1\right) \| \mathrm{Fe}^{3+}(\mathrm{aq}), \mathrm{Fe}^{2+}(\mathrm{aq}) \mid \operatorname{Pt}(\mathrm{s}) $ Given: $\mathrm{E}_{\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}^{\infty}=0.771 \mathrm{~V}$ and $...

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The sum of bridging carbonyls in W(CO)6 and Mn2 (CO)10 is ________ .

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It is observed that characteristic X-ray spectra of elements show regularity. When frequency to the power ' $n$ ' i.e....

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Match List – I with List – II Choose the correct answer from the options given below:

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$\mathrm{H}_2 \mathrm{O}_2$ acts as a reducing agent in

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The number of paramagnetic species from the following is_____.

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For certain chemical reaction X Y, the rate of formation of product is plotted against the time as shown in...

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The density of 3 M solution of NaCl is $1.0 \mathrm{~g} \mathrm{~mL}^{-1}$. Molality of the solution is __________ $...

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Lithium aluminium hydride can be prepared from the reaction of

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In sulphur estimation. 0.471 g of an organic compound gave 1.4439 g of barium sulphate. The percentage of sulphur in...

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The correct increasing order of the ionic radii is

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Following figure shows dependence of molar conductance of two electrolytes on concentration. is the limiting molar conductivity.

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The total number of lone pairs of electrons on oxygen atoms of ozone is_____

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Water decomposes at 2300 K $\mathrm{H}_2 \mathrm{O}(\mathrm{g}) \rightarrow \mathrm{H}_2(\mathrm{~g})+\frac{1}{2} \mathrm{O}_2(\mathrm{~g})$ The percent of water decomposing at 2300 K and 1...

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Match items of column I and IICorrect match is :

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For the first order reaction $\mathrm{A} \rightarrow \mathrm{B} \mathrm{Br}$ the half life is 30 mm . The time taken for...

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For $OF_2$ molecule consider the following: (A) Number of lone pairs on oxygen is 2. (B) FOF angle is less...

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Match List I and List II Choose the correct answer from the options given below:

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Solid Lead nitrate is dissolved in 1 litre of water. The solution was found to boil at 100.15ºC. When 0.2...

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Number of moles of AgCl formed in the following reaction is _____.

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The density of a monobasic strong acid (Molar mass 24.2 g mol ) is 1.21 kg L . The volume...

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The magnetic moment of a transition metal compound has been calculated to be 3.87 B.M. The metal ion is

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Consider the following reaction approaching equilibrium at 27ºC and 1 atm pressure The standard Gibb’s energy change (rG°) at 27ºC...

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Match List I with List II Choose the correct answer from the options given below:

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Uracil is base present in RNA with the following structure. % of N in uracil is ______. Given : Molar...

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How many of the following metal ions have similar value of spin only magnetic moment in gaseous state? $\_\_\_\_$ (Given:...

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The number of molecules or ions from the following, which do not have odd number of electrons are ______.

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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion...

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Which transition in the hydrogen spectrum would have the same wavelength as the Balmer type transition from n = 4...

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For independent process at 300 K. The number of non-spontaneous process from the following is ______.

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Millimoles of calcium hydroxyide required to produce 100 mL of the aqueous solution of pH 12 is x × 10–1....

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In the wet tests for identification of various cations by precipitation, which transition element cation doesn't belong to group IV...

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The osmotic pressure of solutions of PVC in cyclohexanone at 300 K are plotted on the graph. The molar mass...

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But-2-yne is reacted separately with one mole of Hydrogen as shown $...

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Compound that will give positive Lassaigne’s test for both nitrogen and halogen is

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A protein 'X' with molecular weight of 70,000 u, on hydrolysis gives amino acids. One of these amino acid is

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The d-electronic configuration of $\left[\mathrm{CoCl}_4\right]^{2-}$ in tetrahedral crystal field is $\mathrm{e}^{\mathrm{m}} t 2^{\mathrm{n}}$. Sum of 'm' and 'number of unpaired...

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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion...

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A litre of buffer solution contains 0.1 mole of each of $\mathrm{NH}_3$ and $\mathrm{NH}_4 \mathrm{Cl}$. On the addition of 0.02...

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To inhibit the growth of tumours, identify the compounds used from the following: (A) EDTA (B) Coordination Compounds of Pt...

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Number of cyclic tripeptides formed with 2 amino acids A and B is:

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Increasing order of stability of the resonance structure is :

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During the qualitative analysis of $\mathrm{SO}_3^{2-}$ using dilute $\mathrm{H}_2 \mathrm{SO}_4, \mathrm{SO}_2$ gas is evolved which turns $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ solution...

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An athlete is given 100 g of glucose $\left(\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6\right)$ for energy. This is equivalent to 1800 kJ of...

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The correct order of melting point of dichlorobenzenes is

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Match List I with List II

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Choose the correct statement(s): A. Beryllium oxide is purely acidic in nature. B. Beryllium carbonate is kept in the atmosphere...

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Formation of photochemical smog involves the following reaction in which A, B and C are respectively. (i) $\mathrm{NO}_2 \xrightarrow{\mathrm{hv}} \mathrm{A}+\mathrm{B}$...

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In the cumene to phenol preparation in presence of air, the intermediate is

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During the borax bead test with CuSO4, a blue green colour of the bead was observed in oxidising flame due...

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When $\mathrm{Fe}_{0.93} \mathrm{O}$ is heated in presence of oxygen, it converts to $\mathrm{Fe}_2 \mathrm{O}_3$. The number of correct statement/s from...

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Identify $\mathrm{X}, \mathrm{Y}$ and Z in the following reaction. (Equation not balanced) $$ \mathrm{ClO}+\mathrm{NO}_2 \underline{X} \xrightarrow{\mathrm{H}_2 \mathrm{O}} \underline{\mathrm{Y}}+\underline{\mathrm{Z}} $$

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Q JEE MAIN 2023

Match the List–I with List–II :

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Match List I with List II Choose the correct answer form the options given below:

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Match List I with List II

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The major product ‘P’ for the following sequence of reactions is: 1) $\mathrm{Zn} / \mathrm{Hg}$ HCI major product 2) $\mathrm{LiAlH}_4$...

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Which of the following is correct order of ligand field strength?

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Order of Covalent bond;

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Cobalt chloride when dissolved in water forms pink colored complex X which has octahedral geometry. This solution on treating with...

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How can photochemical smog be controlled?

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15. Match List I with List II.

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At 298 K, a 1 litre solution containing 10 mmol of $\mathrm{Cr}_2 \mathrm{O}_7^{2-}$ and 100 mmol of $\mathrm{Cr}^{3+}$ shows a...

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The alkaline earth metal sulphate(s) which are readily soluble in water is/are:

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Some reactions of NO2 relevant to photochemical smog formation are Identify A, B, X and Y

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Which of the following complex will show largest splitting of d–orbitals?

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Assertion A : Hydrolysis of an alkyl chloride is a slow reaction but in the presence of NaI, the rate...

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The increasing order of pKa for the following phenols is

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The number of correct statement/s from the following is _______. A. Larger the activation energy, smaller is the value of...

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Identify the correct order for the given property for following compounds

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Which of the following are the example of double salt? Choose the correct answer.

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A solution of $\mathrm{FeCl}_3$ when treated with $\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$ gives a prussiun blue precipitate due to the formation of

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Resonance in carbonate ion $\left(\mathrm{CO}_3^{2-}\right)$ is Which of the following is true?

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Given below are two statements: Statement I: Chlorine can easily combine with oxygen to from oxides: and the product has...

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Chiral complex from the following is : Here en = ethylene diamine

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Match List I with List II

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Compound A reacts with $\mathrm{NH}_4 \mathrm{Cl}$ and forms a compound B . Compound B reacts with $\mathrm{H}_2 \mathrm{O}$ and excess...

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If wavelength of the first line of the Paschen series of hydrogen atom is 720 nm, then the wavelength of...

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Caprolactam when heated at high temperature in presence of water, gives

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Correct statement about smog is

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Which of the following statements is incorrect for antibiotics?

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5 g of NaOH was dissolved in deionized water to prepare a 450 mL stock solution. What volume (in mL)...

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The standard electrode potential (M3+/M2+) for V, Cr, Mn and Co are –0.26 V, –0.41 V, +1.57 V and +1.97...

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When $\mathrm{Cu}^{2+}$ ion is treated with KI , a white precipitate, X appears in solution. The solution is titrated with...

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'25 volume' hydrogen peroxide means

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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The dissociation constant of acetic is $\mathrm{x} \times 10^{-5}$. When 25 mL of $0.2 \mathrm{M} \mathrm{CH}_3 \mathrm{COONa}$ solution is mixed...

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A obtained by Ostwald‟s method involving air oxidation of NH3, upon further air oxidation produces “B”. “B” on hydration forms...

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Compound (X) undergoes following sequence of reactions to give the Lactone (Y).

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The correct order of basicity of oxides of vanadium is

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Which of the following is true about freons ?

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The magnetic behaviour of Li2O, Na2O2 and KO2, respectively, are

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In the depression of freezing point experiment A. Vapour pressure of the solution is less than that of pure solvent...

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Decreasing order of dehydration of the following alcohols is

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The major products 'A' and 'B', respectively, are

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Consider the following reaction $$ \text { Propanal }+ \text { Methanal }=\xrightarrow[\substack{\text { (iii)s } \\ \text { (ii)...

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The correct sequence of reagents for the preparation of Q and R is :

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The correct order of hydration enthalpies is (A) K+ (B) Rb+ (C) Mg2+ (D) Cs+ (E) Ca2+ Choose the correct...

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Given below are two statements : Statement I : Noradrenaline is a neurotransmitter. Statement II : Low level of noradrenaline...

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Highest oxidation state of Mn is exhibited in Mn2O7. The correct statements about Mn2O7 are (A) Mn is tetrahedrally surrounded...

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Decreasing order of the hydrogen bonding in following forms of water is correctly represented by A. Liquid water B. Ice...

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Which of the given compounds can enhance the efficiency of hydrogen storage tank?

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Amongst the following compounds, which one is an antacid ?

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Which one of the following reactions does not occur during extraction of copper ?

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The reaction representing the Mond process for metal refining is ______ [

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In the extraction of copper, its sulphide ore is heated in a reverberatory furnace after mixing with silica to :

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The correct representation in six membered pyranose form for the following sugar [X] is

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The methods NOT involved in concentration of ore are (A) Liquation (B) Leaching (C) Electrolysis (D) Hydraulic washing (E) Froth...

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The bond dissociation energy is highest for

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In the following given reaction ‘A’ is

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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Which of the following salt solutions would coagulate the colloid solution formed when FeCl3 is added to NaOH solution, at...

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$\mathrm{Nd}^{2+}=$

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Which of the following represents the lattice structure of$\mathrm{A}_{0.95} \mathrm{O}$ containing $\mathrm{A}^{2+} \mathrm{A}^{3+}$ and $\mathrm{O}^2$ions?

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'A' and 'B' formed in the following set of reactions are :

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Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R:...

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The shortest wavelength of hydrogen atom in Lyman series is . The longest wavelength in Balmer series of He+ is

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Reaction of BeO with ammonia and hydrogen fluoride gives 'A' which on thermal decomposition gives $\mathrm{BeF}_2$ and $\mathrm{NH}_4 \mathrm{~F}$. What...

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Match items of Row I with those of Row II.

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Which of the following compounds would give the following set of qualitative analysis ? (i) Fehling's Test: Positive (ii) Na...

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Match List I with List II.

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Statement I : For colloidal particles, the values of colligative properties are of small order as compared to values shown...

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Match List I with List II. Choose the correct answer from the options given below :

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Which of the following conformations will be the most stable ?

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'R' formed in the following sequence of reaction is:

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The radius of the $2^{\text {nd }}$ orbit of $\mathrm{Li}^{2+}$ is x . The expected radius of the $...

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An ammoniacal metal salt solution gives a brilliant red precipitate on addition of dimethylglyoxime. The metal ion is :

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A cubic solid is made up of two elements $X$ and $Y$. Atoms of $X$ are present on every alternate...

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The primary and secondary valencies of cobalt respectively in $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right] \mathrm{Cl}_2$ are :

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Reaction of thionyl chloride with white phosphorus forms a compound [A], which on hydrolysis gives [B], a dibasic acid. [A]...

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Which of the Phosphorus oxoacid can create silver mirror from $\mathrm{AgNO}_3$ solution ?

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Match List I with List II Choose the correct answer from the options given below:

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It is observed that characteristic X-ray spectra of elements show regularity. When frequency to the power 'n' i.e. $v^n$ of...

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The variation of the rate of an enzyme catalyzed reaction with substrate concentration is correctly represented by graph

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The compound which will have the lowest rate towards nucleophilic aromatic substitution on treatment with OH– is

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The magnetic moment of a transition metal compound has been calculated to be 3.87 B.M. The metal ion is

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Increasing order of stability of the resonance structure is :

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Order of Covalent bond;

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Assertion A : Hydrolysis of an alkyl chloride is a slow reaction but in the presence of NaI, the rate...

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Compound (X) undergoes following sequence of reactions to give the Lactone (Y).

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K_a for CH_3 COOH is 1.8×〖10〗^(-5) and K_b for NH_4 OH is 1.8×〖10〗^(-5). The pH of ammonium acetate solution will...

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Consider the following reaction: 3PbCl_2+2(NH_4 )_3 PO_4→Pb_3 (PO_4 )_2+6NH_4 Cl If 72mmol of PbCl_2 is mixed with 50mmol of (NH_4...

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Among the following oxide of p - block elements, number of oxides having amphoteric nature is Cl_2 O_7,CO,PbO_2,〖" " N〗_2...

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Lowest Oxidation number of an atom in a compound A_2 " " B is -2 . The number of an...

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Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is

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Number of colourless lanthanoid ions among the following is…. Eu^(3+),Lu^(3+),Nd^(3+),La^(3+),Sm^(3+)

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The number of molecules/ion/s having trigonal bipyramidal shape is PF_5,BrF_5,PCl_5,[PtCl_4 ]^(2-),BF_3,Fe(CO)_5

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The ratio of ( ^14 C)/( ^12 C) in a piece of wood is 1/8 part that of atmosphere. If...

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Total number of essential amino acid among the given list of amino acids is ______ Arginine, Phenylalanine, Aspartic acid, Cysteine,...

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Number of ambidentate ligands among the following is $\_\_\_\_$ $ \mathrm{NO}_2^{-}, \mathrm{SCN}^{-}, \mathrm{C}_2 \mathrm{O}_4^{2-}, \mathrm{NH}_3, \mathrm{CN}^{-}, \mathrm{SO}_4^{2-}, \mathrm{H}_2 \mathrm{O} $

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The number of white coloured salts among the following is (A) SrSO_4 (B) Mg(NH_4 ) PO_4 (c) BaCrO_4 (D) Mn(OH)_2...

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The total number of species from the following in which one unpaired electron is present, is N_2,O_2,C_2^-,O_2^-,O_2^(2-),H_2^+,CN^-,He_2^+

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The potential for the given half cell at 298" " K is (-)………...×〖10〗^(-2) " " V. 2H^+ _"aq) " +2e^-→H_2...

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Molarity (M) of an aqueous solution containing xg of anhyd. CuSO_4 in 500" " mL solution at 32 ^∘ C...

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Number of optical isomers possible for 2 – chlorobutan

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When equal volume of 1 MHCl and $1 \mathrm{MH}_2 \mathrm{SO}_4$ are separately neutralised by excess volume of 1 M NaOH...

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The standard reduction potentials at 298" " K for the following half cells are given below : ■(&Cr_2 O_7^(2-)+14H^++6e^-→2Cr^(3+)+7H_2 O,E^∘=1.33"...

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How many compounds among the following compounds show inductive, mesomeric as well as hyperconjugation effects?

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Given below are two statements : Statement I : The rate law for the reaction A+B→C is rate (r)=k[A]^2 ["...

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The heat of solution of anhydrous $\mathrm{CuSO}_4$ and $\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}$ are $-70 \mathrm{~kJ} \mathrm{~mol}^{-1}$ and $...

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$0.05 \mathrm{MCuSO}_4$ when treated with $0.01 \mathrm{MKK}_2 \mathrm{Cr}_2 \mathrm{O}_7$ gives green colour solution of $\mathrm{Cu}_2 \mathrm{Cr}_2 \mathrm{O}_7$. The [SPM: Semi...

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Identify the incorrect statements regarding primary standard of titrimetric analysis (A) It should be purely available in dry form. (B)...

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On reaction of Lead Sulphide with dilute nitric acid which of the following is not formed ?

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Identify the product A and product B in the following set of reactions.

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Identify major product " X " formed in the following reaction :

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Compare the energies of following sets of quantum numbers for multielectron system. (A) n=4,1=1 (B) n=4,1=2 (C) n=3,1=1 (D) n=3,1=2...

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For the given reaction, choose the correct expression of $\mathrm{K}_{\mathrm{C}}$ from the following :- $\mathrm{Fe}_{(\mathrm{aq})}^{3+}+\mathrm{SCN}_{(\mathrm{aq})}^{-} \rightleftharpoons\left(\mathrm{FeSCN)}_{(\mathrm{aq})}^{2+}\right.$

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Given below are two statements: Statement (I) : The NH_2 group in Aniline is ortho and para directing and a...

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Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following :

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Match List - I with List -II. Choose the correct answer from options given below:

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Given below are two statements : Statement (I) : Potassium hydrogen phthalate is a primary standard for standardisation of sodium...

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In Kjeldahl's method for estimation of nitrogen, CuSO_4 acts as :

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What is the structure of C ?

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The electronic configuration of $\mathrm{Cu}($ □ II) is $3 \mathrm{~d}^9$ whereas that of $\mathrm{Cu}(\mathrm{I})$ is $3 \mathrm{~d}^{10}$. Which of the...

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Identify the logic operation performed by the given circuit

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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Given below are two statements : one is labelled as Assertion (A) : and the other is labelled as Reason...

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Arrange the bonds in order of increasing ionic character in the molecules. LiF,K_2 O,N_2,SO_2 and CIF_3.

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The parameter that remains the same for molecules of all gases at a given temperature is :

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For the given compounds, the correct order of increasing $\mathrm{pK}_{\mathrm{a}}$ value

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Ionic reactions with organic compounds proceed through: (A) Homolytic bond cleavage (B) Heterolytic bond cleavage (C) Free radical formation (D)...

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Which of the following compound will most easily be attacked by an electrophile?

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Given below are two statements one is labelled as Assertion (A) and the other is labelled as Reason (R): Assertion...

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Which of the following complex is homoleptic?

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Number of molecules/species from the following having one unpaired electron is $\mathrm{O}_2, \mathrm{O}_2^{-1}, \mathrm{NO}, \mathrm{CN}^{-1}, \mathrm{O}_2^{2-}$

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Given below are two statements. Statement (I): The oxidation state of an element in a particular compound is the charge...

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The number of different chain isomers for $\mathrm{C}_7 \mathrm{H}_{16}$ is $\_\_\_\_$ .

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Given below are two statements: Statement (I) : Aminobenzene and aniline are same organic compounds. Statement (II) : Aminobenzene and...

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Relative stability of the contributing structures is :

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2.5 g of a non-volatile, non-electrolyte is dissolved in 100 g of water at $25^{\circ} \mathrm{C}$. The solution showed boiling...

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Identify A and B in the following sequence of reaction

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Consider the following transformation involving first order elementary reaction in each step at constant temperature as shown below. $...

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The F-ions make the enamel on teeth much harder by converting hydroxyapatite (the enamel on the surface of teeth) into...

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In which one of the following pairs the central atoms exhibit $\mathrm{sp}^2$ hybridization?

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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion...

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Correct order of basic strength of Pyrrole

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Given below are two statements: Statement (I): A solution of [Ni(H_2 O)_6 ]^(2+) is green in colour. Statement (II): A...

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In the following sequence of reaction, the major products B and C respectively are :

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Consider the following reaction $\mathrm{MnO}_2+\mathrm{KOH}+\mathrm{O}_2 \rightarrow \mathrm{~A}+\mathrm{H}_2 \mathrm{O}$ Product ' $A$ ' in neutral or acidic medium disproportionate to give...

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Only 2 mL of $\mathrm{KMnO}_4$ solution of unknown molarity is required to reach the end point of a titration of...

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Methods used for purification of organic compounds are based on :

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The de-Broglie's wavelength of an electron in the $4^{\text {th }}$ orbit is $\_\_\_\_$ $\pi \mathrm{a}_0 \cdot\left(\mathrm{a}_0=\right.$ Bohr's radius $)$

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Xg of ethylamine is subjected to reaction with NaNO_2/HCl followed by water; evolved dinitrogen gas which occupied 2.24 L volume...

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In case of isoelectronic species the size of F^-,Ne and Na^+is affected by:

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A solution containing 10g of an electrolyte $\mathrm{AB}_2$ in 100g of water boils at $100.52^{\circ} \mathrm{C}$. The degree of ionization...

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The molar conductivity for electrolytes A and B are plotted against $C^{1 / 2}$) as shown below. Electrolytes A and...

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The number of correct reaction(s) among the following is

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Major product B of the following reaction has π-bond.

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The enthalpy of formation of ethane (C_2 H_6 ) from ethylene by addition of hydrogen where the bondenergies of C-H,C-C,H-H...

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Consider the following reaction A+B→C The time taken for A to become $1 / 4^{\text {th }}$ of its initial...

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If 279" " g of aniline is reacted with one equivalent of benzenediazonium chloride, the mximum amount of aniline yellow...

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Number of molecules from the following which are exceptions to octet rule is $...

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The correct order of first ionization enthalpy values of the following elements is : (A) 0 (B) N (C) Be...

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An ideal gas, $\overline{\mathrm{C}}_{\mathrm{V}}=\frac{5}{2} \mathrm{R}$, is expanded adiabatically against a constant pressure of 1 atm untill it doubles in volume....

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The 'spin only' magnetic moment value of $\mathrm{MO}_4{ }^{2-}$ is BM. (Where M is a metal having least metallic radii....

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9.3g of pure aniline is treated with bromine water at room temperature to give a white precipitate of the product...

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Identify the correct set of reagents or reaction conditions ' X ' and ' Y ' in the following set...

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The number of optical isomers in following compound is : _____ .

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In the lewis dot structure for NO_2^-, total number of valence electrons around nitrogen is

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The number of halobenzenes from the following that can be prepared by Sandmeyer's reaction is .......

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The Molarity (M) of an aqueous solution containing 5.85 g of NaCl in 500 mL water is i. (Given :...

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Number of amine compounds from the following giving solids which are soluble in NaOH upon reaction with Hinsberg's reagent is...

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Among $\mathrm{CrO}, \mathrm{Cr}_2 \mathrm{O}_3$ and $\mathrm{CrO}_3$, the sum of spin-only magnetic moment values of basic and amphoteric oxides is $\_\_\_\_$...

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An artificial cell is made by encapsulating 0.2M glucose solution within a semipermeable membrane. The osmotic pressure developed when the...

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Consider the figure provided. 1 mol of an ideal gas is kept in a cylinder, fitted with a piston, at...

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During Kinetic study of reaction 2 A+B→C+D, the following results were obtained : Based on above data, overall order of...

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Number of elements from the following that CANNOT form compounds with valencies which match with their respective group valencies is...

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The major products from the following reaction sequence are product A and product B. The total sum of π electrons...

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Identify the product in the following reaction :

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The spin only magnetic moment value of the ion among Ti^(2+),V^(2+),Co^(3+) and Cr^(2+), that acts as strong oxidising agent in...

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The element which shows only one oxidation state other than its elemental form is :

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Frequency of the de-Broglie wave of election in Bohr's first orbit of hydrogen atom is $\times 10^{13} \mathrm{~Hz}$ (nearest integer)....

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Consider the given chemical reaction sequence : Total sum of oxygen atoms in Product A and Product B are

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A hypothetical electromagnetic wave is show below. The frequency of the wave is $x \times 10^{19}$ Hz. x= ___________ (nearest...

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Which of the following is the correct structure of L-Glucose?

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The major product of the following reaction is P. Number of oxygen atoms present in product ' P ' is...

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The heat of combustion of solid benzoic acid at constant volume is -321.30" " kJ at 〖27〗^∘ C. The heat...

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Which of the following nitrogen containing compound does not give Lassaigne's test ?

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In a borax bead test under hot condition, a metal salt (one from the given) is heated at point B...

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9.3 g of pure aniline upon diazotisation followed by coupling with phenol gives an orange dye. The mass of orange...

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The value of Rydberg constant (R_H ) is 2.18×〖10〗^(-18) " " J. The velocity of electron having mass 9.1×〖10〗^(-31) "...

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Given below are two statements. Statement 1. Acidity of $\alpha$-hydrogens of aldehydes and ketones is responsible for Aldol reaction. Statement...

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Number of complexes with even number of electrons in $t_{2 g}$ orbitals is - $...

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The number of neutrons present in the more abundant isotope of boron is ' x '. Amorphous boron upon heating...

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Number of molecules from the following which can exhibit hydrogen bonding is . (nearest integer)

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Match List I with List II Choose the correct answer from the options given below :

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Molar ionic conductivities of divalent cation and anion are 57" " S〖" " cm〗^2 〖" " mol〗^(-1) and 73" "...

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Time required for 99.9% completion of a first order reaction is time the time required for completion of 90% reaction.(nearest...

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Iron (III) catalyses the reaction between iodide and persulphate ions, in which A. $\mathrm{Fe}^{3+}$ oxidises the iodide ion B. $\mathrm{Fe}^{3+}$...

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Which among the following is incorrect statement ?

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The difference in the 'spin-only' magnetic moment values of $\mathrm{KMnO}_4$ and the manganese product formed during titration of $\mathrm{KMnO}_4$ against...

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Given below are two statement : Statement I : Bromination of phenol in solvent with low polarity such as CHCl_3...

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Number of molecules/ions from the following in which the central atom is involved in $\mathrm{sp}^3$ hybridization is $...

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Match List I with List II Choose the correct answer from the options given below :

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Consider the dissociation of the weak acid HX as given below $ \mathrm{HX}(\mathrm{aq}) \rightleftharpoons \mathrm{H}^{+}(\mathrm{aq})+\mathrm{X}^{-}(\mathrm{aq}), \mathrm{Ka}=1.2 \times 10^{-5} $ $\left[\mathrm{K}_{\mathrm{a}}:\right.$...

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Ail organic compound has 42.1% carbon, 6.4% hydrogen and remainder is oxygen. If its molecular weight is 342 , then...

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Given below are two statements: Statement I : $\mathrm{N}\left(\mathrm{CH}_3\right)_3$ and $\mathrm{P}\left(\mathrm{CH}_3\right)_3$ can act as ligands to form transition metal complexes....

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Which one of the following molecules has maximum dipole moment?

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The metal that shows highest and maximum number of oxidation state is:

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Match List I with List II : Choose the correct answer from the options given below :

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Which of the following gives a positive test with ninhydrin?

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A conductivity cell with two electrodes (dark side) are half filled with infinitely dilute aqueous solution of a weak electrolyte....

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Among the following halogens $\mathrm{F}_2, \mathrm{Cl}_2, \mathrm{Br}_2$ and $\mathrm{I}_2$

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The correct order of ligands arranged in increasing field strength.

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Number of complexes from the following with even number of unpaired "d" electrons is

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Given below are two statements : Statement I: Nitration of benzene involves the following step Statement II: Use of Lewis...

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Which of the following are aromatic?Which of the following are aromatic?

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In the given compound, the number of $2^{\circ}$ carbon atom /s is

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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At $-20^{\circ} \mathrm{C}$ and 1 atm pressure, a cylinder is filled with equal number of $\mathrm{H}_2 . \mathrm{I}_2$ and HI...

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One of the commonly used electrode is calomel electrode. Under which of the following categories calomel electrode comes?

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Which one of the following complexes will exhibit the least paramagnetic behaviour ? [Atomic number, Cr=24,Mn=25,Fe=26,Co=27 ]

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Identify (B) and (C) and how are (A) and (C) related (B) (C) ?

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The incorrect statement regarding the given structure is The incorrect statement regarding the given structure is

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Which among the following aldehydes is most reactive towards nucleophilic addition reactions?

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The density of ' $x$ ' M solution (' x ' molar) of NaOH is $1.12 \mathrm{~g} \mathrm{~mL}^{-1}$. while in...

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An octahedral complex with the formula $\mathrm{CoCl}_3 \mathrm{nNH}_3$ upon reaction with excess of $\mathrm{AgNO}_3$ solution given 2 moles of AgCl....

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Thiosulphate reacts differently with iodine and bromine in the reaction given below : $2 \mathrm{~S}_2 \mathrm{O}_3^{2-}+\mathrm{I}_2 \rightarrow \mathrm{~S}_4 \mathrm{O}_6^{2-}+2 \mathrm{I}^{-}$...

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The number of element from the following that do not belong to lanthanoids is : Eu,Cm,Er,Tb,Yb and Lu

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In the precipitation of the iron group (III) in qualitative analysis, ammonium chloride is added before adding ammonium hydroxide to...

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14. The electron affinity value are negative for : A. Be→Be^- B. N→N^- C. O→O^(2-) D. Na→Na E. Al→Al^- Choose...

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What will be the decreasing order of basic strength of the following conjugate bases? $...

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Match List I with List II : Choose the correct answer from the options given below :

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Consider the following complexes. The correct order of A, B, C and D in terms of wavenumber of light absorbed...

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Which of the following material is not a semiconductor.

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In Reimer - Tiemann reaction, phenol is converted into salicylaldehyde through an intermediate. The structure of intermediate is ______.

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For the given hypothetical reactions, the equilibrium constants are as follows: The equilibrium constant for the reaction X⇌W is

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Match List I and with List II Choose the correct answer from the option below :

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Match List I with List-II Choose the correct answer from the option below :

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Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R:...

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The incorrect postulates of the Dalton's atomic theory are : (A) Atoms of different elements differ in mass. (B) Matter...

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Identify the factor from the following that does not affect electrolytic conductance of a solution.

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Identify the major products A and B respectively in the following set of reactions.

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Combustion of glucose $\left(\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6\right)$ produces $\mathrm{CO}_2$ and water. The amount of oxygen (in g ) required for the...

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Match List I with List II : Choose the correct answer from the options given below :

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Which among the following compounds will undergo fastest $\mathrm{S}_{\mathrm{N}} 2$ reaction.

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Which of the following statements are correct ? A. Glycerol is purified by vacuum distillation because it decomposes at its...

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Given below are two statements: Statement I : IUPAC name of Compound A is 4-chloro-1, 3-dinitrobenzene: Statement II: IUPAC name...

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Given below are two statements : Statement I : Gallium is used in the manufacturing of thermometers. Statement II :...

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Match List I with List II : Choose the correct answer from the options given below :

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The reaction at cathode in the cells commonly used in clocks involves.

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DNA molecule contains 4 bases whoes structure are shown below. One of the structure is not correct, identify the incorrect...

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Identify ' A ' in the following reaction :

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One Faraday of electricity liberates $x \times 10^{-1}$ gram atom of copper from copper sulphate, x is _____ .

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Match List -I with List II :

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The ionization energy of sodium in $\mathrm{kJmol}^{-1}$. If electromagnetic radiation of wavelength 242 nm is just sufficient to ionize sodium...

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Number of σ and π bonds present in ethylene molecule is respectively :

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Which of the following is metamer of the given compound (X)?

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Given below are two statements : Statement I: In group 13, the stability of +1 oxidation state increases down the...

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Consider the following reaction at 298" " K. $\frac{3}{2} \mathrm{O}_{2(\mathrm{~g})} \rightleftharpoons \mathrm{O}_{3(\mathrm{~g})} \cdot \mathrm{K}_{\mathrm{p}}=2.47 \times 10^{-29}$ $\Delta_{\mathrm{r}} \mathrm{G}^{\Theta}$ for the...

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Given below are two statements : Statement I : Picric acid is 2, 4, 6-trinitrotoluene. Statement II : Phenol-2, 4-disulphuric...

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Which of the following reactions are disproportionation reactions?

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For the compounds : (A) H_3 C-CH_2-O-CH_2-CH_2-CH_3 (B) H_3 C-CH_2-CH_2-CH_2-CH_3 (C) (D) The increasing order of boiling point is :...

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Number of alkanes obtained on electrolysis of a mixture of $\mathrm{CH}_3 \mathrm{COONa}$ and $\mathrm{C}_2 \mathrm{H}_5 \mathrm{COONa}$ is ______.

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Match List I with List II : Choose the correct answer from the options given below :

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The total number of hydrogen atoms in product A and product B is ________ .

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In acidic medium, K_2 Cr_2 O_7 shows oxidising action as represented in the half reaction Cr_2 O_7^(2-)+XH^++Ye^-→2" " A+ZH_2 O...

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The statement(s) that are correct about the species O^(2-),F^-,Na^+and Mg^(2+). (A) All are isoelectronic (B) All have the same nuclear...

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Functional group present in sulphonic acid is :

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Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R)...

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The number of species from the following in which the central atom uses sp^3 hybrid orbitals in its bonding is...

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If one strand of a DNA has the sequence ATGCTTCA, sequence of the bases in complementary strand is:

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Identify compound (Z) in the following reaction sequence

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Number of compounds among the following which contain sulphur as heteroatom is Furan,Thiophene, Pyridine, Pyrrole, Cysteine, Tyrosine

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The product of the following reaction is P. The number of hydroxyl groups present in the product P is _______.

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The following reaction occurs in the Blast furnance where iron ore is reduced to iron metal Using the Le-chatelier's principle,...

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The correct sequence of ligands in the order of decreasing field strength is

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Number of moles of methane required to produce $22 \mathrm{gCO}_{2(\mathrm{~g})}$ after combustion is $x \times 10^{-2}$ moles. The value of...

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Consider the given reaction. The total number of oxygen atoms present per molecule of the product (P) is

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From the compounds given below, number of compounds which give positive Fehling's test is Benzaldehyde, Acetaldehyde, Acetone, Acetophenone,Methanal, 4-nitrobenzaldehyde, cyclohexane...

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The 'Spin only' Magnetic moment for $\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+}$ is $\_\_\_\_$ $\times 10^{-1} \mathrm{BM}$. ( given = Atomic number of Ni: 28)

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The number of species from the following which are paramagnetic and with bond order equal to one is $...

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Given below are two statements: Statement-I: The gas liberated on warming a salt with dil H_2 SO_4, turns a piece...

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What pressure (bar) of H_2 would be required to make emf of hydrogen electrode zero in pure water at 25^∘...

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Following is a confirmatory test for aromatic primary amines. Identify reagent (A) and (B)

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The mass of sodium acetate (CH_3 COONa) required to prepare 250" " mL of 0.35M aqueous solution is _____ g....

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The osmotic pressure of a dilute solution is $7 \times 10^5 \mathrm{~Pa}$ at 273 K . Osmotic pressure of the...

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Molar mass of the salt from $\mathrm{NaBr}, \mathrm{NaNO}_3, \mathrm{KI}$ and $\mathrm{CaF}_2$ which does not evolve coloured vapours on heating with...

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2MnO_4^-+bI^-+cH_2 O→xI_2+yMnO_2+zOH^- If the above equation is balanced with integer coefficients, the value of z is _______.

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A solution of H_2 SO_4 is 31.4%H_2 SO_4 by mass and has a density of 1.25" " g/mL. The molarity...

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Match List I with List II Choose the correct answer from the options given below:

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□( ) 0.05" " cm thick coating of silver is deposited on a plate of 0.05〖" " m〗^2 area. The...

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For the reaction N_2 O_4 (" " g)⇌2NO_2 (" " g), K_p=0.492" " atm at 300" " K.K_c for the...

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The compound formed by the reaction of ethanal with semicarbazide contains _____ number of nitrogen atoms.

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Consider the oxides of group 14 elements SiO_2,GeO_2,SnO_2,PbO_2,CO and GeO. The amphoteric oxides are

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On a thin layer chromatographic plate, an organic compound moved by 3.5" " cm, while the solvent moved by 5"...

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For a reaction taking place in three steps at same temperature, overall rate constant K=(K_1 〖" " K〗_2)/〖" " K〗_3...

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The total number of molecular orbitals formed from 2s and 2p atomic orbitals of a diatomic molecule

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The mass of zinc produced by the electrolysis of zinc sulphate solution with a steady current of 0.015 A for...

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if IUPAC name of an element is "Unununnium" then the element belongs to nth group of periodic table. The value...

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An ideal gas undergoes a cyclic transformation starting from the point A and coming back to the same point by...

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The arenium ion which is not involved in the bromination of Aniline is .

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Number of compounds with one lone pair of electrons on central atom amongst following is O_3,H_2 O,SF_4,ClF_3,NH_3,BrF_5,XeF_4

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The pH at which $\mathrm{Mg}(\mathrm{OH})_2\left[\mathrm{~K}_{\mathrm{sp}}=1 \times 10^{-11}\right]$ begins to precipitate from a solution containing 0.10 M $\mathrm{Mg}^{2+}$ ions is

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The rate of first order reaction is $0.04 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$ at 10 minutes and $0.03 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$ at...

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In alkaline medium. MnO_4^-oxidises I^-to

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Match List I with List II Choose the correct answer from the options given below:

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Choose the correct Statements from the following: (A) Ethane-1 2-diamine is a chelating ligand. (B) Metallic aluminium is produced by...

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Which of the following is not correct ?

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Chlorine undergoes disproportionation in alkaline medium as shown below : a Cl_2 (" " g)+bOH^- (aq)→cClO^- (aq)+dCl^- (aq) +e_2 O(l)...

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The Lassiagne's extract is boiled with dil HNO_3 before testing for halogens because,

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The correct statements from following are: A. The strength of anionic ligands can be explained by crystal field theory. B....

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The final product A formed in the following multistep reaction sequence is

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Compound A formed in the following reaction reacts with B gives the product C. Find out A and B.

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Given below are two statements: Statement I: IUPAC name of $\mathrm{HO}-\mathrm{CH}_2-\left(\mathrm{CH}_2\right)_3-\mathrm{CH}_2-\mathrm{COCH}_3$ is 7-hydroxyheptan-2-one. Statement II: 2-oxoheptan-7-ol is the correct IUPAC...

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Match List-I with List-II Choose the correct answer from the options given below

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Type of amino acids obtained by hydrolysis of proteins is :

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Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion...

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In which one of the following metal carbonyls, CO forms a bridge between metal atoms?

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Integrated rate law equation for a first order gas phase reaction is given by (where P_i is initial pressure and...

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What happens to freezing point of benzene when small quantity of napthalene is added to benzene?

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KMnO_4 decomposes on heating at 513" " K to form O_2 along with

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Given below are two statement one is labeled as Assertion (A) and the other is labeled as Reason (R). Assertion...

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'Adsorption' principle is used for which of the following purification method?

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In the given reactions identify the reagent A and reagent B

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The interaction between π bond and lone pair of electrons present on an adjacent atom is responsible for

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Identify the incorrect pair from the following:

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Identify correct statements from below: A. The chromate ion is square planar. B. Dichromates are generally prepared from chromates. C....

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The final product A, formed in the following multistep reaction sequence is:

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Identify product A and product B :

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The correct sequence of electron gain enthalpy of the elements listed below is A. Ar B. Br C. F D....

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Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion...

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Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R...

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Appearance of blood red colour, on treatment of the sodium fusion extract of an organic compound with FeSO_4 in presence...

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Match List-I with List-II

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The product (C) in the below mentioned reaction is:

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The major product (P) in the following reaction is

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Structure of 4-Methylpent-2-enal is

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A species having carbon with sextet of electrons and can act as electrophile is called

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Example of vinylic halide is

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The correct set of four quantum numbers for the valence electron of rubidium atom (Z=37) is:

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The metals that are employed in the battery industries are A. Fe B. Mn C. Ni D. Cr E. Cd...

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Given below are two statements: Statement-I : The orbitals having same energy are called as degenerate orbitals. Statement-II : In...

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Given below are two statements : Statement I : The electronegativity of group 14 elements from Si to Pb gradually...

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The compound that is white in color is

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Aluminium chloride in acidified aqueous solution forms an ion having geometry

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Identify the mixture that shows positive deviations from Raoult's Law

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The difference in energy between the actual structure and the lowest energy resonance structure for the given compound is

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Diamagnetic Lanthanoid ions are:

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In chromyl chloride test for confirmation of Cl^- ion, a yellow solution is obtained. Acidification of the solution and addition...

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Which of the following molecule/species is most stable?

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Match List I with List II List-I List-II (Substances) (Element present) A. Ziegler catalyst I. Rhodium B. Blood Pigment II....

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Give below are two statements: Statement-I : Noble gases have very high boiling points. Statement-II: Noble gases are monoatomic gases....

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Given below are the two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R)....

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Q JEE MAIN 2024

Sugar which does not give reddish brown precipitate with Fehling's reagent is:

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This reduction reaction is known as:

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Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R:...

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Q JEE MAIN 2025

For the reaction $A \rightarrow B$ the following graph was obtained. The time required (in seconds) for the concentration of...

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Q JEE MAIN 2025

When 1 g each of compounds $A B$ and $A B_{2}$ are dissolved in 15 g of water separately, they...

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Q JEE MAIN 2025

$0.2 \%(\mathrm{w} / \mathrm{v})$ solution of NaOH is measured to have resistivity $870.0 \mathrm{~m} \Omega \mathrm{~m}$. The molar conductivity of...

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Q JEE MAIN 2025

Consider the above sequence of reactions. 151 g of 2-bromopentane is made to react. Yield of major product P is...

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Q JEE MAIN 2025

Match List - I with List - II. Choose the correct answer from the options given below :

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Consider the following reactions. From these reactions which reaction will give carboxylic acid as a major product? (A) $...

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Reactant A converts to product D through the given mechanism (with the net evolution of heat) : $\mathrm{A} \rightarrow \mathrm{B}$...

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Which of the following statements are true? (A) The subsidiary quantum number $l$ describes the shape of the orbital occupied...

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Q JEE MAIN 2025

When a concentrated solution of sulphanilic acid and 1-naphthylamine is treated with nitrous acid ( 273 K ) and acidified...

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The d-orbital electronic configuration of the complex among $\left[\mathrm{Co}(\mathrm{en})_{3}\right]^{3+},\left[\mathrm{CoF}_{6}\right]^{3-},\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$ and $\left[\mathrm{Zn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$ that has the highest CFSE is :

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Q JEE MAIN 2025

Match List - I with List - II. Choose the correct answer from the options given below :

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In 3,3-dimethylhex-1-en-4-yne, there are $\_\_\_\_$ $s p^{3}$, $\_\_\_\_$ $s p^{2}$ and $\_\_\_\_$ sp hybridised carbon atoms respectively.

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Q JEE MAIN 2025

Given below are two statements : Statement (I) : Neopentane forms only one monosubstituted derivative. Statement (II) : Melting point...

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Q JEE MAIN 2025

The nature of oxide $\left(\mathrm{TeO}_{2}\right)$ and hydride $\left(\mathrm{TeH}_{2}\right)$ formed by Te, respectively are :

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Q JEE MAIN 2025

Consider the following chemical equilibrium of the gas phase reaction at a constant temperature : $A(g) \rightleftharpoons B(g)+C(g)$ If $p$...

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Formation of $\mathrm{Na}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{5} \mathrm{NOS}\right]$, a purple coloured complex formed by addition of sodium nitroprusside in sodium carbonate extract of salt...

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Q JEE MAIN 2025

Arrange the following in order of magnitude of work done by the system/on the system at constant temperature. (a) $...

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' x ' g of NaCl is added to water in a beaker with a lid. The temperature of the...

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Q JEE MAIN 2025

In Dumas' method for estimation of nitrogen, 0.5 gram of an organic compound gave 60 mL of nitrogen collected at...

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Q JEE MAIN 2025

Electronic configuration of four elements $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and D are given below : (A) $...

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A tetrapeptide, " $x$ " on complete hydrolysis produced glycine (Gly), alanine (Ala), valine (Val), leucine (Leu) in equimolar proportion...

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Which among the following molecules is (a) involved in $s p^{3} d$ hybridization, (b) has different bond lengths and (c)...

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The type of hybridization and the magnetic property of $\left[\mathrm{MnCl}_{6}\right]^{3-}$ are

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Q JEE MAIN 2024

From the given list, the number of compounds with +4 oxidation state of Sulphur $...

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Q JEE MAIN 2024

Sum of bond order of CO and $NO^+$ is

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The number of electrons present in all the completely filled subshells having $\mathrm{n}=4$ and $\mathrm{s}=+\frac{1}{2}$ is (Where $\mathrm{n}=$ principal quantum...

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Q JEE MAIN 2024

Among the following, total number of meta directing functional groups is (Integer based) $\begin{aligned} & -\mathrm{OCH}_3,-\mathrm{NO}_2,-\mathrm{CN},-\mathrm{CH}_3-\mathrm{NHCOCH}_3 \\ & -\mathrm{COR},-\mathrm{OH},-\mathrm{COOH},-\mathrm{Cl}\end{aligned}$

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Q JEE MAIN 2024

Among the given organic compounds, the total number of aromatic compounds is

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3-Methylhex-2-ene on reaction with HBr in presence of peroxide forms an addition product (A). The number of possible stereoisomers for...

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If three moles of an ideal gas at 300 K expand isotherrnally from $30dm^3$ to $45dm^3$ against a constant opposing...

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Q JEE MAIN 2024

Mass of methane required to produce 22 g of $CO_2$ after complete combustion is g. (Given Molar mass in g...

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Consider the following data for the given reaction $2 \mathrm{HI}_{(\mathrm{g})} \rightarrow \mathrm{H}_{2(\mathrm{~g})}+\mathrm{I}_{2(\mathrm{~g})}$ The order of the reaction is

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The mass of silver (Molar mass of $Ag:108gmol^{-1}$) displaced by a quantity of electricity which displaces 5600 mL of $O_2$...

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Q JEE MAIN 2024

The electronic configuration for Neodymium is: [Atomic Number for Neodymium 60]

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Q JEE MAIN 2024

The correct statement regarding nucleophilic substitution reaction in a chiral alkyl halide is ;

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NaCl reacts with conc. $H_2 SO_4$ and $K_2Cr_2O_7$ to give reddish fumes (B), which react with NaOH to give yellow...

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Q JEE MAIN 2024

IUPAC name of following compound (P) is :

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Given below are two statements : Statement (I) : Aqueous solution of ammonium carbonate is basic. Statement (II) : Acidic/basic...

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Q JEE MAIN 2024

Yellow compound of lead chromate gets dissolved on treatment with hot NaOH solution. The product of lead formed is a...

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Q JEE MAIN 2024

Cyclohexene is _______ type of an organic compound.

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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Q JEE MAIN 2024

Element not showing variable oxidation state is :

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The ascending order of acidity of -OH group in the following compounds is : Choose the correct answer from the...

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Given below are two statements : Statement (I) : p-nitrophenol is more acidic than m-nitrophenol and o-nitrophenol. Statement (II) :...

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Given below are two statements : Statement (I) : The 4f and 5f - series of elements are placed separately...

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Q JEE MAIN 2024

Choose the polar molecule from the following :

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Consider the following complex ions $\begin{aligned} & \mathrm{P}=\left[\mathrm{FeF}_6\right]^{3-} \\ & \mathrm{Q}=\left[\mathrm{V}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+} \\ & \mathrm{R}=\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}\end{aligned}$ The correct order of...

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Q JEE MAIN 2024

A solution of two miscible liquids showing negative deviation from Raoult's law will have :

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Q JEE MAIN 2024

Which of the following has highly acidic hydrogen?

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Q JEE MAIN 2024

Which of the following electronic configuration would be associated with the highest magnetic moment?

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Which of the following is strongest Bronsted base

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Highest enol content will be shown by :

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Q JEE MAIN 2024

Two nucleotides are joined together by a linkage known as :

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Q JEE MAIN 2025

Isomeric hydrocarbons → negative Baeyer's test (Molecular formula $\mathrm{C}_{9} \mathrm{H}_{12}$ ) The total number of isomers from above with four...

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In the Claisen-Schmidt reaction to prepare, dibenzalacetone from 5.3 g of benzaldehyde, a total of 3.51 $g$ of product was...

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Q JEE MAIN 2025

Total number of non bonded electrons present in $\mathrm{NO}_{2}{ }^{-}$ ion based on Lewis theory is $\_\_\_\_$ .

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Consider the following low-spin complexes $\mathrm{K}_{3}\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{6}\right], \mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right], \mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right], \mathrm{Cu}_{2}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$ and $\mathrm{Zn}_{2}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$. The sum of the spin-only magnetic moment values of...

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Q JEE MAIN 2025

In the sulphur estimation, 0.20 g of a pure organic compound gave 0.40 g of barium sulphate. The percentage of...

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Given below are two statements : Statement $(\mathrm{I}): \mathrm{NaCl}$ is added to the ice at $0^{\circ} \mathrm{C}$, present in the...

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Given below are two statements : Statement (I): In partition chromatography, stationary phase is thin film of liquid present in...

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Q JEE MAIN 2025

For hydrogen like species, which of the following graphs provides the most appropriate representation of E vs Z plot for...

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If $C$ (diamond) $\rightarrow C$ (graphite ) $+X \mathrm{~kJ} \mathrm{~mol}^{-1}$ $\mathrm{C}($ diamond $)+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{CO}_{2}(\mathrm{~g})+\mathrm{YkJmol}^{-1}$ C (graphite) $+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{CO}_{2}(\mathrm{~g})+\mathrm{ZkJmol}^{-1}$...

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Q JEE MAIN 2025

First ionisation enthalpy values of first four group 15 elements are given below. Choose the correct value for the element...

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Q JEE MAIN 2025

Match List - I with List - II : Choose the correct answer from the options given below :

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Q JEE MAIN 2025

$\mathrm{O}_{2}$ gas will be evolved as a product of electrolysis of :[0pt] (A) an aqueous solution of $\mathrm{AgNO}_{3}$ using silver...

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Q JEE MAIN 2025

0.1 M solution of KI reacts with excess of $\mathrm{H}_{2} \mathrm{SO}_{4}$ and $\mathrm{KIO}_{3}$ solutions. According to equation $...

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Q JEE MAIN 2025

The calculated spin-only magnetic moments of $\mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{OH})_{6}\right]$ and $\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{OH})_{6}\right]$ respectively are :

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Q JEE MAIN 2025

Given below are two statements :[0pt] Statement (I): It is impossible to specify simultaneously with arbitrary precision, both the linear...

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Identify the essential amino acids from below :[0pt] (A) Valine (B) Proline (C) Lysine (D) Threonine (E) Tyrosine Choose the...

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Consider the equilibrium[0pt] $\mathrm{CO}(\mathrm{g})+3 \mathrm{H}_{2}(\mathrm{~g}) \rightleftharpoons \mathrm{CH}_{4}(\mathrm{~g})+\mathrm{H}_{2} \mathrm{O}(\mathrm{g})$ If the pressure applied over the system increases by two fold at...

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Q JEE MAIN 2025

Total number of sigma ( $\sigma$ ) $\_\_\_\_$ and $\operatorname{pi}(\pi)$ $\_\_\_\_$ bonds respectively present in hex-1-en-4-yne are :

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Identify the homoleptic complexes with odd number of d electrons in the central metal :[0pt] [JEE MAIN\_290125\_S2] [Coordination] [T-5] [Ea\$...

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Q JEE MAIN 2025

Drug $X$ becomes ineffective after $50 \%$ decomposition. The original concentration of drug in a bottle was $...

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The type of oxide formed by the element among $\mathrm{Li}, \mathrm{Na}, \mathrm{Be}, \mathrm{Mg}, \mathrm{B}$ and Al that has the least...

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Q JEE MAIN 2025

Which among the following halides will generate the most stable carbocation in the nucleophilic substitution reaction?

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Given below are two statements : Statement (I) : On nitration of m-xylene with $\mathrm{HNO}_{3}, \mathrm{H}_{2} \mathrm{SO}_{4}$ followed by oxidation,...

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Thyroxine, the hormone has given below structure The percentage of iodine in thyroxine is ____%. (nearest integer) (Given molar mass...

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The percentage dissociation of a salt $\left( {{\rm{M}}{{\rm{X}}_3}} \right)$ solution at given temperature (van't Hoff factor ${\rm{i}} = 2$) is...

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The number of paramagnetic complexes among ${\left[ {{\rm{Fe}}{{\rm{F}}_6}} \right]^{3-}},{\left[ {{\rm{Fe}}{{({\rm{CN}})}_6}} \right]^{3-}},{\left[ {{\rm{Mn}}{{({\rm{CN}})}_6}} \right]^{3 - }}$, $...

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Q JEE MAIN 2025

An organic compound weighing 500 mg, produced 220 mg of${\rm{C}}{{\rm{O}}_2}$, on complete combustion. The percentage composition of carbon in the...

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1 Faraday electricity was passed through ${\rm{C}}{{\rm{u}}^{2 + }}(1.5{\rm{M}},1\;{\rm{L}})/{\rm{Cu}}$ and 0.1 Faraday was passed through ${\rm{A}}{{\rm{g}}^ + }(0.2{\rm{M}},1\;{\rm{L}})/{\rm{Ag}}$ electrolytic cells....

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Given below are two statements: Statement I: D-(+)-glucose + D-(+) fructose $\xrightarrow{-\mathrm{H}_2 \mathrm{O}}$ Sucrose sucrose $\xrightarrow{\text { hydrolysis }} \mathrm{D}-(+)$...

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When a salt is treated with sodium hydroxide solution it gives gas X. On passing gas X through reagent Y...

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Q JEE MAIN 2025

Which of the following is the correct IUPAC name of given organic compound (X) ?

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The reactions which cannot be applied to prepare an alkene by elimination, are. Choose the correct answer from the options...

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Q JEE MAIN 2025

The first transition series metal 'M' has the highest enthalpy of atomisation in its series. One of its aquated ion...

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Q JEE MAIN 2025

Given below are two statements: Statement I: Dimethyl ether is completely soluble in water. However, diethyl ether is soluble in...

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Reaction ${\rm{A}}({\rm{g}}) \to 2\;{\rm{B}}(\;{\rm{g}}) + {\rm{C}}({\rm{g}})$ is a first order reaction. It was started with pure A Which of the...

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Q JEE MAIN 2025

Which of the following compounds is least likely to give effervescence of ${\rm{C}}{{\rm{O}}_2}$ in presence of aq. ${\rm{NaHC}}{{\rm{O}}_3}$ ?

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Q JEE MAIN 2025

A person's wound was exposed to some bacteria and then bacterial growth started to happen at the same place. The...

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Total enthalpy change for freezing of 1 mol of water at ${10^\circ}{\rm{C}}$ to ice at $ - {10^\circ }{\rm{C}}$ is...

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Q JEE MAIN 2025

Given below are two statements: Statement I: Mohr's salt is composed of only three types of ions-ferrous, ammonium and sulfate....

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Q JEE MAIN 2025

The group 14 elements A and B have the first ionisation enthalpy values of 708 and $715\;{\rm{kJ}}\;{\rm{mo}}{{\rm{l}}^{ - 1}}$ respectively....

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Q JEE MAIN 2025

Which of the following statements are correct, if the threshold frequency of caesium is $5.16 \times {10^{14}}\;{\rm{Hz}}$ ? A. When...

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Q JEE MAIN 2025

An octahedral complex having molecular composition ${\rm{Co}}.5{\rm{N}}{{\rm{H}}_3} \cdot {\rm{C}}{{\rm{l}}^2}.{\rm{S}}{{\rm{O}}_4}$ has two isomers A and B. The solution of A gives...

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Which of the following amine (s) show (s) positive carbylamine test? Choose the correct answer from the options given below:

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Match the LIST-I with LIST-I Choose the correct answer from the options given below:

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Q JEE MAIN 2025

An aqueous solution of HCl with pH 1.0 is diluted by adding equal volume of water (ignoring dissociation of water)....

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Q JEE MAIN 2025

The number of valence electrons present in the metal among ${\rm{Cr}},{\rm{Co}},{\rm{Fe}}$ and Ni which has the lowest enthalpy of atomisation...

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Given below are two statements: Statement I: Ozonolysis followed by treatment with ${\rm{Zn}},{{\rm{H}}_2}{\rm{O}}$ of cis-2-butene gives ethanal. Statement II: The...

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Q JEE MAIN 2025

At the sea level, the dry air mass percentage composition is given as nitrogen gas: 70.0, oxygen gas: 27.0 and...

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${\rm{KMn}}{{\rm{O}}_4}$ acts as an oxidising agent in acidic medium. 'X' is the difference between the oxidation states of Mn in...

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Fortification of food with iron is done using ${\rm{FeS}}{{\rm{O}}_4} \cdot 7{{\rm{H}}_2}{\rm{O}}$ . The mass in grams of the ${\rm{FeS}}{{\rm{O}}_4}$. $7{{\rm{H}}_2}{\rm{O}}$...

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The pH of a 0.01 M weak acid ${\rm{HX}}\left( {{{\rm{K}}_a} = 4 \times {{10}^{ - 10}}} \right)$ is found to...

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Q JEE MAIN 2025

The total number of hydrogen bonds of a DNA-double Helix strand whose one strand has the following sequence of bases...

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Q JEE MAIN 2025

In Dumas' method for estimation of nitrogen 1 g of an organic compound gave 150 mL of nitrogen collected at...

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Q JEE MAIN 2025

Given below are two statements: Statement I: Nitrogen forms oxides with +1 to +5 oxidation states due to the formation...

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One mole of an ideal gas expands isothermally and reversibly from $10{\rm{d}}{{\rm{m}}^3}$ to $20{\rm{d}}{{\rm{m}}^3}$ at 300 K. $\Delta {\rm{U}},{\rm{q}}$ and...

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Which of the following molecule(s) show/s paramagnetic behavior? A. ${{\rm{O}}_2}$ B. ${{\rm{N}}_2}$ C. ${{\rm{F}}_2}$ D. ${{\rm{S}}_2}$ E. ${\rm{C}}{{\rm{l}}_2}$ Choose the...

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Given below are two statements. Statement I: The dipole moment of $...

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Benzene is treated with oleum to produce compound (X) which when further heated with molten sodium hydroxide followed by acidification...

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Given below are the pairs of group 13 elements showing their relation in terms of atomic radius. $...

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Which one of the following about an electron occupying the 1 s orbital in a hydrogen atom is incorrect? (Bohr's...

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XY is the membrane/partition between two chambers 1 and 2 containing sugar solutions of concentration ${{\rm{c}}_1}$ and $...

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Aldol condensation is a popular and classical method to prepare $\alpha ,\beta $ -unsaturated carbonyl compounds. This reaction can be...

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Q JEE MAIN 2025

Pair of transition metal ions having the same number of unpaired electrons is

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Which one of the following complexes will have ${\Delta _0} = 0$ and $\mu = 5.96$ B.M?

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Let us consider a reversible reaction at temperature, T. In this reaction, both $\Delta {\rm{H}}$ and $\Delta {\rm{S}}$ were observed...

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An organic compound (X) with molecular formula ${{\rm{C}}_3}{{\rm{H}}_6}{\rm{O}}$ is not readily oxidised. On reduction it gives ${{\rm{C}}_3}{{\rm{H}}_8}{\rm{O}}({\rm{Y}})$ which reacts with...

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On charging the lead storage battery, the oxidation state of lead changes from ${x_1}$ to ${y_1}$ at the anode and...

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The major product (A) formed in the following reaction sequence is

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For $\mathrm{A}_2+\mathrm{B}_2 \rightleftharpoons 2 \mathrm{AB}$ ${{\rm{E}}_{\rm{a}}}$ for forward and backward reaction are 180 and $200\;{\rm{kJ}}\;{\rm{mo}}{{\rm{l}}^{ - 1}}$ respectively If catalyst...

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Number of stereoisomers possible for the complexes, $\left[ {{\rm{CrC}}{{\rm{l}}_3}{{({\rm{py}})}_3}} \right]$ and ${\left[ {{\rm{CrC}}{{\rm{l}}_2}{{({\rm{ox}})}_2}} \right]^{3 - }}$ are respectively (py =...

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Rate law for a reaction between A and B is given by ${\rm{r}} = {\rm{k}}{[\;{\rm{A}}]^{\rm{n}}}{[\;{\rm{B}}]^{\rm{m}}}$ If concentration of A is...

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Q JEE MAIN 2025

Predict the major product of the following reaction sequence:-

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Identify the pair of reactants that upon reaction, with elimination of HCl will give rise to the dipeptide Gly-Ala.

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The spin only magnetic moment $(\mu)$ value (B.M.) of the compound with strongest oxidising power among $\mathrm{Mn}_{2} \mathrm{O}_{3}$, TiO and...

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Electrolysis of 600 mL aqueous solution of NaCl for 5 min changes the pH of the solution to 12 ....

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A group 15 element forms $\mathrm{d} \pi-\mathrm{d} \pi$ bond with transition metals. It also forms hydride, which is a strongest...

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For bacterial growth in a cell culture, growth law is very similar to the law of radioactive decay. Which of...

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An ideal gas undergoes a cyclic transformation starting from the point $A$ and coming back to the same point by...

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The product B formed in the following reaction sequence is :

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The major product of the following reaction is :

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The total number of compounds from below when treated with hot $\mathrm{KMnO}_{4}$ giving benzoic acid is :

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Assume a living cell with $0.9 \%(\omega / \omega)$ of glucose solution (aqueous). This cell is immersed in another solution...

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Identify correct conversion during acidic hydrolysis from the following : (A) starch gives galactose. (B) cane sugar gives equal amount...

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Consider an elementary reaction $\mathrm{A}(\mathrm{g})+\mathrm{B}(\mathrm{g}) \rightarrow \mathrm{C}(\mathrm{g})+\mathrm{D}(\mathrm{g})$ If the volume of reaction mixture is suddenly reduced to $\frac{1}{3}$ of its...

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Concentrated nitric acid is labelled as $75 \%$ by mass. The volume in mL of the solution which contains 30...

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Match List - I with List - II.[0pt] Choose the correct answer from the options given below :

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Match List - I with List - II. Choose the correct answer from the options given below :

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Arrange the following in increasing order of solubility product : $\mathrm{Ca}(\mathrm{OH})_{2}, \mathrm{AgBr}, \mathrm{PbS}, \mathrm{HgS}$

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The purification method based on the following physical transformation is :

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Given below are two statements : Statement (I): According to the Law of Octaves, the elements were arranged in the...

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The amphoteric oxide among $\mathrm{V}_{2} \mathrm{O}_{3}, \mathrm{~V}_{2} \mathrm{O}_{4}$ and $\mathrm{V}_{2} \mathrm{O}_{5}$, upon reaction with alkali leads to formation of an...

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Given below are two statements : In the light of the above statements, choose the correct answer from the options...

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Which of the following is/are not correct with respect to energy of atomic orbitals of hydrogen atom?[0pt] (A) $1 \mathrm{~s}

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Identify correct statements :[0pt] (A) Primary amines do not give diazonium salts when treated with $\mathrm{NaNO}_{2}$ in acidic condition. (B)...

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Identify the inorganic sulphides that are yellow in colour :[0pt] [JEE MAIN\_280125\_S2][Chemical bonding] [T-16][M0derate] (A) $\left(\mathrm{NH}_{4}\right)_{2} \mathrm{~S}$ (B) PbS (C)...

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Identify product $[A],[B]$ and $[C]$ in the following reaction sequence. $$ \mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{CH} \xrightarrow[\mathrm{H}_{2}]{\mathrm{Pd} / \mathrm{C}}[\mathrm{~A}] \xrightarrow[\text { (ii)...

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Consider the following reactions $...

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The number of optical isomers exhibited by the iron complex (A) obtained from the following reaction is _____ $...

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During estimation of nitrogen by Dumas' method of compound ${\rm{X}}(0.42\;{\rm{g}})$ _______ mL of ${{\rm{N}}_2}$ gas will be liberated at STP....

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Given : $\Delta {{\rm{H}}^ \ominus }{\rm{ sub }}$ $[{\rm{C }}({\rm{graphite}})] = 710\;{\rm{kJ}}\;{\rm{mo}}{{\rm{l}}^{ - 1}}$ $...

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0.5 g of an organic compound on combustion gave 1.46 g of ${\rm{C}}{{\rm{O}}_2}$ and 0.9 g of ${{\rm{H}}_2}{\rm{O}}$. The percentage...

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Which compound would give 3-methyl-6-oxoheptanal upon ozonolysis?

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Identify [A] ,[B] and [C] , respectively in the following reaction sequence:

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Given below are two statements: Statement I : A catalyst cannot alter the equilibrium constant of the reaction, temperature remaining...

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In the following system, $\mathrm{PCl}_5(\mathrm{~g}) \leftrightharpoons \mathrm{PCl}_3(\mathrm{~g})+\mathrm{Cl}_2(\mathrm{~g})$ at equilibrium, upon addition of xenon gas at constant T & p, the...

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Number of molecules from below which cannot give iodoform reaction is: Ethanol, Isopropyl alcohol, Bromoacetone, 2-Butanol, 2-Butanone, Butanal, 2-Pentanone, 3-Pentanone,...

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In the following reactions, which one is NOT correct?

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The metal ions that have the calculated spin-only magnetic moment value of 4.9 B.M. are : A. ${\rm{C}}{{\rm{r}}^{2 + }}$...

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The least acidic compound, among the following is:

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Which of the following is the correct structure of L- Fructose?

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Correct order of limiting molar conductivity for cations in water at 298 K is :

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Match the LIST-I with LIST-II

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Identify the correct statements from the following.

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Given below are two statements: Statement I : The N - N single bond is weaker and longer than that...

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Which of the following properties will change when system containing solution 1 will become solution 2?

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In a reaction $A + B \to C$, initial concentrations of A and B are related as ${[A]_0} = 8{[B]_0}$....

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The correct order of the complexes $...

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Among ${10^{ - 9}}\;{\rm{g}}$ (each) of the following elements, which one will have the highest number of atoms? Element: ${\rm{Pb}},{\rm{Po}},{\rm{Pr}}$...

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Which of the following postulate of Bohr's model of hydrogen atom is not in agreement with quantum mechanical model of...

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2 moles each of ethylene glycol and glucose are dissolved in 500 g of water. The boiling point of the...

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Which of the following statements are correct? A. The process of adding an electron to a neutral gaseous atom is...

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In Carius method of estimation of halogen, 0.25 g of an organic compound gave 0.15 g of silver bromide $(\mathrm{AgBr})$....

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The observed and normal molar masses of compound $M X_{2}$ are 65.6 and 164 respectively. The percent degree of ionisation...

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Consider a complex reaction taking place in three steps with rate constants $\mathrm{k}_{1}, \mathrm{k}_{2}$ and $\mathrm{k}_{3}$ respectively. The overall rate...

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The hydrocarbon $(\mathrm{X})$ with molar mass $80 \mathrm{~g} \mathrm{~mol}^{-1}$ and $90 \%$ carbon has $\_\_\_\_$ degree of unsaturation.

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The possible number of stereoisomers for 5-phenylpent-4-en-2-ol is $\_\_\_\_$ .

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Match List - I with List - II.[0pt] Choose the correct answer from the options given below :

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For the reaction, $\mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{HI}(\mathrm{g})$ Attainment of equilibrium is predicted correctly by :

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Given below are two statements : In the light of the above statements, choose the correct answer from the options...

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In the given structure, number of sp and $\mathrm{sp}^{2}$ hybridized carbon atoms present respectively are:

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Given below are two statements : Statement (I): The first ionization energy of Pb is greater than that of Sn...

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The elemental composition of a compound is $54.2 \% \mathrm{C}, 9.2 \% \mathrm{H}$ and $36.6 \% \mathrm{O}$. If the molar...

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Given below are two statements :[0pt] tatement (I): Experimentally determined oxygen-oxygen bond lengths in the $\mathrm{O}_{3}$ are found to be...

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For hydrogen atom, the orbital/s with lowest energy is/are :[0pt] (A) 4 s (B) $3 p_{x}$ (C) $3 d_{x^{2}-y^{2}}$ (D)...

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Match List - I with List - II. Choose the correct answer from the options given below :

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The structure of the major product formed in the following reaction is:

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Match List - I with List - II. Choose the correct answer from the options given below :

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The successive 5 ionisation energies of an element are $800,2427,3658,25024$ and $32824 \mathrm{~kJ} / \mathrm{mol}$, respectively. By using the above...

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Which of the following mixing of 1 M base and 1 M acid leads to the largest increase in temperature?

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When Ethane-1,2-diamine is added progressively to an aqueous solution of Nickel (II) chloride, the sequence of colour change observed will...

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For reaction The correct order of set of reagents for the above conversion is:

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The conditions and consequence that favours the $\mathrm{t}_{2_{\mathrm{g}}^{3}} \mathrm{e}_{\mathrm{g}}^{1}$ configuration in a metal complex are :

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$\mathrm{S}(\mathrm{g})+\frac{3}{2} \mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{SO}_{3}(\mathrm{~g})+2 x \mathrm{kcal}$ $\mathrm{SO}_{2}(\mathrm{~g})+\frac{1}{2} \mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{SO}_{3}(\mathrm{~g})+y \mathrm{kcal}$ The heat of formation of $\mathrm{SO}_{2}(\mathrm{~g})$ is given by...

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Consider the following electrochemical cell at standard condition. $Au(s)\left| {Q{H_2},Q} \right|N{H_4}X(0.01M)||A{g^ + }(1M)\mid Ag(s){E_{{\rm{cell }}}} = + 0.4V$ The couple...

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For the reaction A $\rightarrow$ products The concentration of A at 10 minutes is _____$ \times {10^{-3}}mol{L^{-1}}$ (nearest integer). The...

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0.1 mol of the following given antiviral compound (P) will weigh _____ $\times {10^{-1}}g$ (nearest integer).

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Consider the following equilibrium, $\mathrm{CO}(\mathrm{~g})+2 \mathrm{H}_2(\mathrm{~g}) \rightleftharpoons \mathrm{CH}_3 \mathrm{OH}(\mathrm{~g})$ 0.1 mol of CO along with a catalyst is present in...

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A transition metal (M) among Mn, Cr, Co and Fe has the highest standard electrode potential $...

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Consider the following molecules :

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The correct order of basic nature in aqueous solution for the bases $N{H_3},{H_2}N - N{H_2},C{H_3}C{H_2}N{H_2},{\left( {C{H_3}C{H_2}} \right)_2}NH$ and $...

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The property/properties that show irregularity in first four elements of group-17 is/are : (A) Covalent radius (B) Electron affinity (C)...

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Choose the correct tests with respective observations. (A) $CuS{O_4}$ (acidified with acetic acid) $ + {K_4}\left[ {Fe{{(CN)}_6}} \right] \to $...

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Two vessels A and B are connected via stopcock. The vessel A is filled with a gas at a certain...

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If equal volumes of $A{B_2}$ and XY (both are salts) aqueous solutions are mixed, which of the following combination will...

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Designate whether each of the following compounds is aromatic or not aromatic.

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An optically active alkyl halide ${C_4}{H_9}Br[A]$ reacts with hot KOH dissolved in ethanol and forms alkene [B] as major product...

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On complete combustion 1.0 g of an organic compound (X) gave 1.46 g of $C{O_2}$ and 0.567 g of ${H_2}O$....

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Given below are two statements : In the light of the above statements, choose the most appropriate answer from the...

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Identify the correct statement among the following :

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Given below are two statements : Statement (I) : The metallic radius of Al is less than that of Ga...

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Among $S{O_2},N{F_3},N{H_3},Xe{F_2},Cl{F_3}$ and $S{F_4}$, the hybridization of the molecule with nonzero dipole moment and highest number of lone-pairs of electrons...

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A molecule with the formula $A{X_4}Y$ has all it's elements from p-block. Element A is rarest, monoatomic, non-radioactive from its...

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Given below are two statements : Statement (I): In octahedral complexes, when ${\Delta _o} < P$ high spin complexes are...

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$CaC{O_3}(s) + 2HCl(aq) \to CaC{l_2}(aq) + C{O_2}(g) + {H_2}O(l)$ Consider the above reaction, what mass of $CaC{l_2}$ will be formed...

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According to Bohr's model of hydrogen atom, which of the following statement is incorrect?

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Which of the following graph correctly represents the plots of ${K_H}$ at 1 bar for gases in water versus temperature?

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Consider the following compound (X) The most stable and least stable carbon radicals, respectively, produced by homolytic cleavage of corresponding...

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A compound ' $X$ ' absorbs 2 moles of hydrogen and ' $X$ ' upon oxidation with $\mathrm{KMnO}_{4}{ }^{*} \mathrm{H}^{+}$gives...

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The bond dissociation enthalpy of $\mathrm{X}_{2} \Delta \mathrm{H}_{\text {bond }}^{\circ}$ calculated from the given data is $\_\_\_\_$ $\mathrm{kJmol}{ }^{-1}$. (Nearest...

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When 81.0 g of aluminium is allowed to react with 128.0 g of oxygen gas, the mass of aluminium oxideproduced...

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0.01 mole of an organic compound $(X)$ containing $10 \%$ hydrogen, on complete-combustion produced$0.9 \mathrm{gH}_{2} \mathrm{O}$. Molar mass of $(\mathrm{X})$...

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Consider the following sequence of reactions. Total number of $\mathrm{sp}^{3}$ hybridised carbon atoms in the major product C formed is...

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Standard electrode potentials for a few half cells are mentioned below : $\mathrm{E}_{\mathrm{Cu}^{2+} / \mathrm{Cu}}^{\circ}=0.34 \mathrm{~V}, \mathrm{E}_{\mathrm{Zn}^{2+} / \mathrm{Zn}}^{\circ}=-0.76 \mathrm{~V}$...

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Identify $\mathrm{A}, \mathrm{B}$ and C in the given below reaction sequence

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The ascending order of relative rate of solvolysis of following compounds is :

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Identify the coordination complexes in which the central metal ion has $d^{4}$ configuration. Choose the correct answer from the options...

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The $\alpha$-Helix and $\beta$-Pleated sheet structures of protein are associated with its :

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Given below are the atomic numbers of some group 14 elements. The atomic number of the element with lowest melting...

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Given below are two statements about X -ray spectra of elements : Statement (I): A plot of $\sqrt{v}$ ( $v=$...

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Identify the products [A] and [B], respectively in the following reaction:

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Given below are two statements: Statement (I): The boiling points of alcohols and phenols increase with increase in the number...

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Which of the following graphs most appropriately represents a zero order reaction?

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Consider a binary solution of two volatile liquid components 1 and $2 . x_{1}$ and $y_{1}$ are the mole fractions...

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When a non-volatile solute is added to the solvent, the vapour pressure of the solvent decreases by 10 mm of...

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Consider the reaction $\mathrm{X}_{2} \mathrm{Y}(\mathrm{g}) \rightleftharpoons \mathrm{X}_{2}(\mathrm{~g})+\frac{1}{2} \mathrm{Y}_{2}(\mathrm{~g})$. The equation representing correct relationship between the degree of dissociation $(x)$ of...

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Match List-I with List-II Choose the correct answer from the options given below :

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The effect of temperature on spontaneity of reactions are represented as : The incorrect combinations are:

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Given below are two statements : Consider the following reaction Statement (I) : In the case of formaldehyde K is...

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Match List - I with List - II. List - I List - II (A) Bronze (I) (B) Brass (II)...

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Consider the following reactions $$ \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \xrightarrow[-\mathrm{H}_{2} \mathrm{O}]{\mathrm{KOH}}[\mathrm{~A}] \xrightarrow[-\mathrm{H}_{2} \mathrm{O}]{\mathrm{H}_{2} \mathrm{O}_{4}}[\mathrm{~B}]+\mathrm{K}_{2} \mathrm{SO}_{4} $$ The products $[\mathrm{A}]$ and $[\mathrm{B}]$,...

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Given below are two statements : Statement (I): For a given shell, the total number of allowed orbitals is given...

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pH of water is 7 at $25^{\circ} \mathrm{C}$. If water is heated to $80^{\circ} \mathrm{C}$., it's pH will :

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The molar mass of the water insoluble product formed from the fusion of chromite ore (${\rm{FeC}}{{\rm{r}}_2}{{\rm{O}}_4}$) with ${\rm{N}}{{\rm{a}}_2}{\rm{C}}{{\rm{O}}_3}$ in presence...

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0.1 mole of compound 'S' will weigh ______ g. (Given molar mass in ${\rm{gmo}}{{\rm{l}}^{ - 1}}{\rm{C}}:12,{\rm{H}}:1,{\rm{O}}:16$ )

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Given below are some nitrogen containing compounds

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The sum of sigma ($\sigma$) and pi ($\pi$) bonds in Hex-1,3-dien-5-yne is

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If ${{\rm{A}}_2}\;{\rm{B}}$ is 30% ionised in an aqueous solution, then the value of van't Hoff factor (i) is ____$...

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The standard reduction potential values of some of the p-block ions are given below. Predict the one with the strongest...

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Match List - I with List - II.

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The reaction ${A_2} + {B_2} \to 2{\rm{AB}}$ follows the mechanism

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An element 'E' has the ionisation enthalpy value of $374\;{\rm{kJ}}\;{\rm{mo}}{{\rm{l}}^{ - 1}}$. 'E' reacts with elements A, B, C and...

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The product (P) formed in the following reaction is :

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In the following substitution reaction :

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Match List - I with List - II.

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Given below are two statements : Statement (I) : The radii of isoelectronic species increases in the order. $...

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Total number of nucleophiles from the following is :

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Match List - I with List - II.

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The molar conductivity of a weak electrolyte when plotted against the square root of its concentration, which of the following...

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The correct increasing order of stability of the complexes based on ${\Delta _0}$ value is : I. $...

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If ${a_0}$ is denoted as the Bohr radius of hydrogen atom, then what is the de-Broglie wavelength $(\lambda )$ of...

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At temperature T, compound ${\rm{A}}{{\rm{B}}_{2(\;{\rm{g}})}}$ dissociates as ${\rm{A}}{{\rm{B}}_{2(\;{\rm{g}})}}$ ⇌ ${\rm{AB}}({\rm{g}}) + \frac{1}{2}\;{{\rm{B}}_{2(\;{\rm{g}})}}$ having degree of dissociation x (small compared to...

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For a ${\rm{Mg}}\left| {{\rm{M}}{{\rm{g}}^{2 + }}({\rm{aq}})} \right|\left| {{\rm{A}}{{\rm{g}}^ + }({\rm{aq}})} \right|{\rm{Ag}}$ the correct Nernst Equation is :

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The correct option with order of melting points of the pairs $({\rm{Mn}},{\rm{Fe}}),({\rm{Tc}},{\rm{Ru}})$ and $({\rm{Re}},{\rm{Os}})$ is :

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1.24 g of ${\rm{A}}{{\rm{X}}_2}$ (molar mass $124\;{\rm{g}}\;{\rm{mo}}{{\rm{l}}^{ - 1}}$) is dissolved in 1 kg of water to form a solution...

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500 J of energy is transferred as heat to 0.5 mol of Argon gas at 298 K and 1.00 atm...

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For the circuit shown above, equivalent GATE is :

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Consider the following sequence of reactions:

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Given below is the plot of the molar conductivity vs $\sqrt {{\rm{ concentration }}}$ for KCl in aqueous solution.

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Quantitative analysis of an organic compound (X) shows following % composition. C : 14.5% Cl : 64.46% H: 1.8% (Empirical...

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The formation enthalpies, $\Delta {{\rm{H}}_{\rm{f}}}^ \ominus $ for ${{\rm{H}}_{({\rm{g}})}}$ and ${{\rm{O}}_{({\rm{g}})}}$ are 220.0 and $250.0\;{\rm{kJ}}\;{\rm{mo}}{{\rm{l}}^{ - 1}}$ , respectively, at...

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The molarity of a 70% (mass/mass) aqueous solution of a monobasic acid (X) is _____ $ \times {10^{ - 1}}$...

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Consider ' n ' is the number of lone pair of electrons present in the equatorial position of the most...

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Ice and water are placed in a closed container at a pressure of 1 atm and temperature 273.15 K ....

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The molecules having square pyramidal geometry are

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The correct order of stability of following carbocations is :

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What is the freezing point depression constant of a solvent, 50 g of which contain 1 g non volatile solute...

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For a given reaction $R \to P,{t_{1/2}}$ is related to ${[A]_0}$ as given in table. Given: $\log 2 = 0.30$...

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Which of the following oxidation reactions are carried out by both ${{\rm{K}}_2}{\rm{C}}{{\rm{r}}_2}{{\rm{O}}_7}$ and ${\rm{KMn}}{{\rm{O}}_4}$ in acidic medium? A. $...

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Given below are two statements: Statement I : D-glucose pentaacetate reacts with 2, 4-dinitrophenylhydrazine Statement II : Starch, on heating...

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A weak acid HA has degree of dissociation x . Which option gives the correct expression of ${\rm{(pH}} - {\rm{p}}{{\rm{K}}_{\rm{a}}})$...

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The incorrect decreasing order of atomic radii is

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A molecule ("P") on treatment with acid undergoes rearrangement and gives ("Q"). ("Q") on ozonolysis followed by reflux under alkaline...

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Both acetaldehyde and acetone (individually) undergo which of the following reactions? A. Iodoform Reaction B. Cannizaro Reaction C. Aldol Condensation...

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Given below are two statements: Statement I: In the oxalic acid vs ${\rm{KMn}}{{\rm{O}}_4}$ (in the presence of dil ${{\rm{H}}_2}{\rm{S}}{{\rm{O}}_4}$) titration...

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Consider the following elements ${\rm{In}},{\rm{Tl}},{\rm{Al}},{\rm{Pb}},{\rm{Sn}}$ and Ge. The most stable oxidation states of elements with highest and lowest first ionisation...

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The compounds that produce ${\rm{C}}{{\rm{O}}_2}$ with aqueous ${\rm{NaHC}}{{\rm{O}}_3}$ solution are:

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The products A and B in the following reactions, respectively are

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In a multielectron atom, which of the following orbitals described by three quantum numbers will have same energy in absence...

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Match the LIST-I with LIST-II Choose the correct answer from the options given below:

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The metal ion whose electronic configuration is not affected by the nature of the ligand and which gives a violet...

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Given below are two statements:

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$37.8\;{\rm{g}}\;{{\rm{N}}_2}{{\rm{O}}_5}$ was taken in a 1 L reaction vessel and allowed to undergo the following reaction at 500 K $2\;{{\rm{N}}_2}{{\rm{O}}_{5(\:{\rm{g}})}}$...

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Xg of benzoic acid on reaction with aq ${\rm{NaHC}}{{\rm{O}}_3}$ released ${\rm{C}}{{\rm{O}}_2}$ that occupied 11.2 L volume at STP. X is...

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Among the following cations, the number of cations which will give characteristic precipitate in their identification tests with $...

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Consider the following reaction occurring in the blast furnace: ${\rm{F}}{{\rm{e}}_3}{{\rm{O}}_{4(\;{\rm{s}})}} + 4{\rm{C}}{{\rm{O}}_{({\rm{g}})}} \to 3{\rm{F}}{{\rm{e}}_{({\rm{l}})}} + 4{\rm{C}}{{\rm{O}}_{2(\;{\rm{g}})}}$ 'x' kg of iron...

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Standard entropies of ${{\rm{X}}_2},{{\rm{Y}}_2}$ and ${\rm{X}}{{\rm{Y}}_5}$ are 70, 50 and $110{\mkern 1mu} {\rm{J}}{{\rm{K}}^{-1}}{\rm{mo}}{{\rm{l}}^{-1}}$ respectively. The temperature in Kelvin at which...

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Preparation of potassium permanganate from ${\rm{Mn}}{{\rm{O}}_2}$ involves two step process in which the 1st step is a reaction with KOH...

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$\;{{\rm{K}}_{{\rm{sp }}}}$ for ${\rm{Cr}}{({\rm{OH}})_3}$ is $1.6 \times {10^{ - 30}}$. What is the molar solubility of this salt in water?

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Following are the four molecules "P", "Q", "R" and "S". Which one among the four molecules will react with $...

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The large difference between the melting and boiling points of oxygen and sulphur may be explained on the basis of

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Given below are two statements I and II. Statement-I : Dumas method is used for estimation of "Nitrogen" in an...

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Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct?

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Given below are two statements: Statement-I : The conversion proceeds well in the less polar medium. $...

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One mole of the octahedral complex compound ${\rm{Co}}{\left( {{\rm{N}}{{\rm{H}}_3}} \right)_5}{\rm{C}}{{\rm{l}}_3}$ gives 3 moles of ions on dissolution in water. One...

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The carbohydrate "Ribose" present in DNA, is A. A pentose sugar B. present in pyranose from C. in "D" configuration...

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Which of the following ions is the strongest oxidizing agent? (Atomic Number of Ce = 58, Eu = 63, Tb...

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For the given cell $...

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The product (1) formed in the following reaction sequence is

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Let us consider an endothermic reaction which is non-spontaneous at the freezing point of water. However, the reaction is spontaneous...

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Which one of the carbocations from the following is most stable?

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Consider the given plots of vapour pressure (VP) vs temperature (T/K). Which amongst the following options is correct graphical representation...

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Which of the following linear combination of atomic orbitals will lead to formation of molecular orbitals in homonuclear diatomic molecules...

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Which of the following statement is true with respect to ${{\rm{H}}_2}{\rm{O}},{\rm{N}}{{\rm{H}}_3}$ and ${\rm{C}}{{\rm{H}}_4}$ ? A. The central atoms of all...

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Which of the following statements are NOT true about the periodic table? A. The properties of elements are function of...

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For a reaction, ${{\rm{N}}_2}{{\rm{O}}_{5(\;{\rm{g}})}} \to 2{\rm{N}}{{\rm{O}}_{2(\;{\rm{g}})}} + \frac{1}{2}{{\rm{O}}_{2(\;{\rm{g}})}}$ in a constant volume container, no products were present initially. The final...

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Aman has been asked to synthesise the molecule . He thought of preparing the molecule using an aldol condensation reaction....

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For the thermal decomposition of ${{\text{N}}_{2}}{{\text{O}}_{5}}(~\text{g})$ at constant volume, the following table can be formed, for the reaction mentioned below....

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Consider the following sequence of reactions to produce major product (A)

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If 1 mM solution of ethylamine produces $\text{pH}=9$ , then the ionization constant $\left( {{{\text{K}}_{\text{b}}}} \right)$ of ethylamine is ${{10}^{{-x}}}$....

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During "S" estimation, 160 mg of an organic compound gives 466 mg of barium sulphate. The percentage of Sulphur in...

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The standard enthalpy and standard entropy of decomposition of ${{\text{N}}_{2}}{{\text{O}}_{4}}$ to $\text{N}{{\text{O}}_{2}}$ are $55.0~\text{kJ}~\text{mo}{{\text{l}}^{{-1}}}$ and $175.0~\text{J}/\text{K}/\text{mol}$ respectively. The standard free...

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The major product of the following reaction is:

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Which of the following happens when $\text{N}{{\text{H}}_{4}}\text{OH}$ is added gradually to the solution containing 1 M ${{\text{A}}^{{2+}}}$ and ions? Given...

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$\text{CrC}{{\text{l}}_{3}}\cdot \text{xN}{{\text{H}}_{3}}$ can exist as a complex. 0.1 molal aqueous solution of this complex shows a depression in freezing point...

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Propane molecule on chlorination under photochemical condition gives two di-chloro products, "x" and "y". Amongst "x" and "y", "x" is...

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The d-electronic configuration of an octahedral Co (II) complex having magnetic moment of 3.95 BM is:

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Match the LIST-I with LIST-II

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The incorrect statement among the following is:

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$2.8\times {{10}^{{-3}}}~\text{mol}$ of $\text{C}{{\text{O}}_{2}}$ is left after removing ${{10}^{{21}}}$ molecules from its 'X' mg sample. The mass of $\text{C}{{\text{O}}_{2}}$ taken...

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$\text{FeO}_{4}^{{2-}}\xrightarrow{{+2.0~\text{V}}}\text{F}{{\text{e}}^{{3+}}}\xrightarrow{{0.8~\text{V}}}\text{F}{{\text{e}}^{{2+}}}\xrightarrow{{-0.5~\text{V}}}\text{F}{{\text{e}}^{0}}$ In the above diagram, the standard electrode potentials are given in volts (over the arrow). The value of ${{\text{E}}_{{\text{FeO}_{4}^{{2-}}/\text{F}{{\text{e}}^{{2+}}}}}}$...

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Which among the following react with Hinsberg's reagent?

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Match the LIST-I with LIST-II Choose the correct answer from the options given below:

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The correct set of ions (aqueous solution) with same colour from the following is:

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Given below are two statements: Statement I: In Lassaigne's test, the covalent organic molecules are transformed into ionic compounds. Statement...

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What amount of bromine will be required to convert 2 g of phenol into 2,4,6-tribromophenol? (Given molar mass in $\text{gmo}{{\text{l}}^{{-1}}}$...

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The complex that shows Facial - Meridional isomerism is:

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Ice at $-{{5}^{{}^\circ }}\text{C}$ is heated to become vapor with temperature of ${{110}^{{}^\circ }}\text{C}$ at atmospheric pressure. The entropy change...

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Heat treatment of muscular pain involves radiation of wavelength of about 900 nm. Which spectral line of H atom is...

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Given below are two statements: Statement I: Fructose does not contain an aldehydic group but still reduces Tollen's reagent Statement...

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The element that does not belong to the same period of the remaining elements (modern periodic table) is:

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Identify the number of structure/s from the following which can be correlated to D-glyceraldehyde.

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Given below are two statements : Statement (I) : Nitrogen, sulphur, halogen and phosphorus present in an organic compound are...

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Consider the given figure and choose the correct option :

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\begin{aligned} &\text { Arrange the following compounds in increasing order of their dipole moment . }\\ &\mathrm{HBr}, \mathrm{H}_2 \mathrm{~S}, \mathrm{NF}_3...

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The molar solubility(s) of zirconium phosphate with molecular formula $\left(\mathrm{Zr}^{4+}\right)_3\left(\mathrm{PO}_4^{3-}\right)_4$ is given by relation :

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Given below are two statements : Statement (I): A spectral line will be observed for a $...

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Density of 3 M NaCl solution is 1.25 g/mL. The molality of the solution is :

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The maximum covalency of a non-metallic group 15 element ‘E’ with weakest E – E bond is :

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Which of the following statement is not true for radioactive decay?

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Given below are two statements : Statement I : One mole of propyne reacts with excess of sodium to liberate...

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A vessel at 1000 K contains ${\rm{C}}{{\rm{O}}_2}$ with a pressure of 0.5 atm . Some of ${\rm{C}}{{\rm{O}}_2}$ is converted into...

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How many different stereoisomers are possible for the given molecule?

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The incorrect statements regarding geometrical isomerism are : (A) Propene shows geometrical isomerism. (B) Trans isomer has identical atoms/groups on...

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Match List-I with List-II.

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Lanthanoid ions with $4{f^7}$ configuration are : (A) $\mathrm{Eu}^{2+}$ (B) $\mathrm{Gd}^{3+}$ (C) $\mathrm{Eu}^{3+}$ (D) $\mathrm{Tb}^{3+}$ (E) $\mathrm{Sm}^{2+}$ Choose the correct...

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The products formed in the following reaction sequence are :

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Which of the following electrolyte can be used to obtain ${{\rm{H}}_2}\;{{\rm{S}}_2}{{\rm{O}}_8}$ by the process of electrolysis?

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Given below are two statements :

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Arrange the following solutions in order of their increasing boiling points (i) $10^{-4} \mathrm{MNaCl}$ (ii) $10^{-4} \mathrm{M}$ Urea (iii) $...

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The compounds which give positive Fehling's test are :

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Which of the following electronegativity order is incorrect?

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A liquid when kept inside a thermally insulated closed vessel at 25°C was mechanically stirred from outside. What will be...

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Which of the following acids is a vitamin?

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The IUPAC name of the following compound is :

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From the magnetic behaviour of $\left[\mathrm{NiCl}_4\right]^{2-}$ (paramagnetic) and $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ (diamagnetic), choose the correct geometry and oxidation state.

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Radius of the first excited state of Helium ion is given as: ${{\rm{a}}_0} \to$ radius of first stationary state of...

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In which of the following complexes the CFSE, ${\Delta _{\rm{o}}}$ will be equal to zero ?

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Some $\mathrm{CO}_2$ gas was kept in a sealed container at a pressure of 1 atm and at 273 K ....

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In Carius method for estimation of halogens, 180 mg of an organic compound produced 143.5 mg of AgCl. The percentage...

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${\rm{A}} \to \;{\rm{B}}$ The molecule A changes into its isomeric form B by following a first order kinetics at a...

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The number of molecules/ions that show linear geometry among the following is ${\rm{S}}{{\rm{O}}_2},{\rm{BeC}}{{\rm{l}}_2},{\rm{C}}{{\rm{O}}_2},\;{\rm{N}}_3^ - ,{\rm{N}}{{\rm{O}}_2},\;{{\rm{F}}_2}{\rm{O}},{\rm{Xe}}{{\rm{F}}_2},{\rm{NO}}_2^ + ,{\rm{I}}_3^ - ,{{\rm{O}}_3}$

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Consider the following sequence of reactions : Molar mass of the product formed (A) is ______ $g^{-1}$.

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A solution of aluminium chloride is electrolysed for 30 minutes using a current of 2 A . The amount of...

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Given below are two statements : Statement (I): Corrosion is an electrochemical phenomenon in which pure metal acts as an...

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20 mL of 2 M NaOH solution is added to 400 mL of 0.5 M NaOH solution. The final concentration...

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The complex of $\mathrm{Ni}^{2+}$ ion and dimethyl glyoxime contains $\_\_\_\_$ number of Hydrogen $(\mathrm{H})$ atoms.

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Niobium (Nb) and ruthenium (Ru) have "x" and "y" number of electrons in their respective 4 d orbitals. The value...

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The compound with molecular formula $\mathrm{C}_6 \mathrm{H}_6$, which gives only one monobromo derivative and takes up four moles of hydrogen...

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Consider the following cases of standard enthalpy of reaction ( $\Delta \mathrm{H}_{\mathrm{r}}^{\circ}$ in $\mathrm{kJmol}^{-1}$ ) $$ \begin{aligned} & \mathrm{C}_2 \mathrm{H}_6(\mathrm{~g})+\frac{7}{2}...

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The species which does not undergo disproportionation reaction is :

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The maximum number of RBr producing 2-methylbutane by above sequence of reactions is _______ . (Consider the structural isomers only)

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When sec-butyl cyclohexane reacts with bromine in the presence of sunlight, the major product is :

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Given below are two statements : Statement (I) : An element in the extreme left of the periodic table forms...

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The correct order of the following complexes in terms of their crystal field stabilization energies is :

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The most stable carbocation from the following is :

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The alkane from below having two secondary hydrogens is :

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Residue (A) + HCl (dil) → Compound (B) Structure of residue (A) and compound (B) formed respectively is :

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Match the Compounds (List - I) with the appropriate Catalyst/Reagents (List - II) for their reduction into corresponding amines. Choose...

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Match List - I with List - II.

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