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A big drop is formed by coalescing 1000 small droplets of water. The surface energy will become :

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Conductivity of a photodiode starts changing only if the wavelength of incident light is less than . The band gap...

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A disc of radius and mass is rolling horizontally without slipping with speed . It then moves up an inclined...

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A diatomic gas does of work when it is expanded isobarically. The heat given to the gas in the process...

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If the curves, $\frac{x^2}{a}+\frac{y^2}{b}=1$ and $\frac{x^2}{c}+\frac{y^2}{d}=1$ intersect each other at an angle of $90^{\circ}$, then which of the following relations...

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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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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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If 5 moles of an ideal gas expands from 10 L to a volume of 100 L at 300 K...

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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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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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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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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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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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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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The following data were obtained during the first order thermal decomposition of a gas A at constant volume:

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Total number of isomeric compounds (including stereoisomers) formed by monochlorination of 2 -methyl butane is

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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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$\mathrm{r}=\mathrm{k}[\mathrm{A}]$ for a reaction, $50 \%$ of A is decomposed in 120 minutes. The time taken for $90 \%$ decomposition...

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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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Acid D formed in above reaction is:

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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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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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$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ and $\left[\mathrm{CoF}_6\right]^{3-}$ are respectively known as:

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The correct order of reactivity in electrophilic substitution reaction of the following compounds is :

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The functional group that shows negative resonance effect is:

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

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The four quantum numbers for the electron in the outer most orbital of potassium (atomic no. 19) are

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The number of radial node/s for 3p orbital is:

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In the given reactions identify A and B.

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Given below are two statements : Statement I: Group 13 trivalent halides get easily hydrolyzed by water due to their...

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Which among the following has highest boiling point?

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Lassaigne's test is used for detection of :

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Select the compound from the following that will show intramolecular hydrogen bonding.

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The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are...

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Which of the following is least ionic ?

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Which of the following compounds show color due to d-d transition?

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Identify the name reaction.

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The strongest reducing agent amount the following is:

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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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$\mathrm{A}_{(\mathrm{g})} \rightleftharpoons \mathrm{B}_{(\mathrm{g})}+\frac{\mathrm{C}}{2}(\mathrm{~g})$ The correct relationship between $K_P, \alpha$ and equilibrium pressure $P$ is

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

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Select the option with correct property –

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A body of mass 5 kg moving with a uniform speed $3 \sqrt{2} \mathrm{~ms}^{-1}$ in $X-Y$ plane along the line...

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Identify structure of 2,3-dibromo-1-phenylpentane.

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A particle is moving in a circle of radius 50 cm in such a way that at any instant the...

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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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In the given circuit, the current flowing through the resistance $20 \Omega$ is 0.3 A , while the ammeter reads...

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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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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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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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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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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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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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Reduction potential of ions are given below: The correct order of their oxidising power is:

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In a single slit diffraction pattern, a light of wavelength $6000 \AA$ is used. The distance between the first and...

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In the given figure, the charge stored in $6 \mu \mathrm{~F}$ capacitor, when points A and B are joined by...

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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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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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A simple harmonic oscillator has an amplitude A and time period $6 \pi$ second. Assuming the oscillation starts from its...

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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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A charge of $4.0 \mu \mathrm{C}$ is moving with a velocity of $4.0 \times 10^6 \mathrm{~ms}^{-1}$ along the positive y...

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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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Hydrogen atom is bombarded with electrons accelerated through a potential different of $V$, which causes excitation of hydrogen atoms. If...

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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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A horizontal straight wire 5 m long extending from east to west falling freely at right angle to horizontal component...

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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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Two metallic wires P and Q have same volume and are made up of same material. If their area of...

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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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An electric field is given by $(6 \hat{\imath}+5 \hat{\jmath}+3 \hat{k}) N / C$. The electric flux through a surface area...

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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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Given below are two statements : Statement I : Most of the mass of the atom and all its positive...

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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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Suppose a uniformly charged wall provides a uniform electric field of $2 \times 10^4 \mathrm{~N} / \mathrm{C}$ normally. A charged...

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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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N moles of a polyatomic gas (f=6) must be mixed with two moles of a monoatomic gas so that the...

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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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Which one of the following will show geometrical isomerism?

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A particle is moving in a straight line. The variation of position ' $x$ ' as a function of time...

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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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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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A uniform rod AB of mass 2 kg and Length 30 cm at rest on a smooth horizontal surface. An...

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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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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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In the given circuit, the current in resistance $R_3$ is i.

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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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In Young's double slit experiment, monochromatic light of wavelength 5000 Å is used. The slits are 1.0 mm apart and...

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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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A plane electromagnetic wave of frequency 35 MHz travels in free space along the X-direction. At a particular point (in...

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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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A planet takes 200 days to complete one revolution around the Sun. If the distance of the planet from Sun...

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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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A wire of length L and radius r is clamped at one end. If its other end is pulled by...

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A coil of 200 turns and area $0.20 \mathrm{~m}^2$ is rotated at half a revolution per second and is placed...

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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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A bob of mass ' $m$ ' is suspended by a light string of length ' $L$ '. It is...

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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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A nucleus has mass number $A_1$ and volume $V_1$. Another nucleus has mass number $A_2$ and volume $V_2$. If relation...

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Which among the following purification methods is based on the principle of "Solubility" in two different solvents?

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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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A small liquid drop of radius R is divided into 27 identical liquid drops. If the surface tension is T,...

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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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Identity the incorrect pair from the following:

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A series $L C R$ circuit with $L=\frac{100}{\pi} \mathrm{mH}, \mathrm{C}=\frac{10^{-3}}{\pi} \mathrm{~F}$ and $\mathrm{R}=10 \Omega$, is connected across an ac source...

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A particular hydrogen - like ion emits the radiation of frequency $3 \times 10^{15} \mathrm{~Hz}$ when it makes transition from...

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Two identical spheres each of mass 2 kg and radius 50 cm are fixed at the ends of a light...

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The incorrect statement regarding conformations of ethane is:

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If Rydberg's constant is R, the longest wavelength of radiation in Paschen series will be $\frac{\alpha}{7 \mathrm{R}}$, where α=

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Two identical spheres each of mass 2 kg and radius 50 cm are fixed at the ends of a light...

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Which of the following cannot function as an oxidising agent ?

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The electric potential at the surface of an atomic nucleus (z=50) of radius $9 \times 10^{-13} \mathrm{~cm}$ is $...

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One end of a metal wire is fixed to a ceiling and a load of 2 kg hangs from the...

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A body of mass ' $m$ ' is projected with a speed ' $u$ ' making an angle of $45^{\circ}$...

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A parallel beam of monochromatic light of wavelength 5000Å is incident normally on a single narrow slit of width 0.001...

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Which structure of protein remains intact after coagulation of egg white on boiling?

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Two circular coils P and Q of 100 turns each have same radius of $\pi \mathrm{cm}$. The currents in P...

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The quantity which changes with temperature is :

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A moving coil galvanometer has 100 turns and each turn has an area of $2.0 \mathrm{~cm}^2$. The magnetic field produced...

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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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A ring and a solid sphere roll down the same inclined plane without slipping. They start from rest. The radii...

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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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The magnetic flux $\phi$ (in weber) linked with a closed circuit of resistance $8 \Omega$ varies with time (in seconds)...

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The reading of pressure metre attached with a closed pipe is $4.5 \times 10^4 \mathrm{~N} / \mathrm{m}^2$. On opening the...

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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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A particle initially at rest starts moving from reference point. x=0 along x-axis, with velocity v that varies as v=$...

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Bond line formula of $\mathrm{HOCH}(\mathrm{CN})_2$ is:

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A body falling under gravity covers two points A and B separated by 80 m in 2 s. The distance...

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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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A closed organ pipe 150 cm long gives 7 beats per second with an open organ pipe of length 350"...

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A mass m is suspended from a spring of negligible mass and the system oscillates with a frequency $f_1$. The...

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Two charges of $-4 \mu \mathrm{C}$ and $+4 \mu \mathrm{C}$ are placed at the points $\mathrm{A}(1,0,4) \mathrm{m}$ and $\mathrm{B}(2,-1,5) \mathrm{m}$...

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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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A body of mass 4 kg experiences two forces $\overrightarrow{\mathrm{F}}_1=5 \hat{\imath}+8 \hat{\jmath}+7 \hat{\mathrm{k}}$ and $\overrightarrow{\mathrm{F}}_2=3 \hat{\imath}-4 \hat{\jmath}-3 \hat{\mathrm{k}}$. The acceleration...

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In Young's double slit experiment, light from two identical sources are superimposing on a screen. The path difference between the...

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A light planet is revolving around a massive star in a circular orbit of radius R with a period of...

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Two particles $X$ and $Y$ having equal charges are being accelerated through the same potential difference. Thereafter they enter normally...

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A transformer has an efficiency of 80% and works at 10 V and 4 kW. If the secondary voltage is...

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If the distance between object and its two times magnified virtual image produced by a curved mirror is 15 cm...

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Consider two physical quantities A and B related to each other as $\mathrm{E}=\frac{\mathrm{B}-\mathrm{x}^2}{\mathrm{At}}$ where $\mathrm{E}, \mathrm{x}$ and t have dimensions...

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

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The output of the given circuit diagram is

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In a metre-bridge when a resistance in the left gap is 2Ω and unknown resistance in the right gap, the...

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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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A galvanometer (G) of 2Ω resistance is connected in the given circuit. The ratio of charge stored in $\mathrm{C}_1$ and...

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The correct IUPAC name of $\mathrm{K}_2 \mathrm{MnO}_4$ is

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Train A is moving along two parallel rail tracks towards north with speed 72 km/h and train B is moving...

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A body of mass 2 kg begins to move under the action of a time dependent force given by $...

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According to IUPAC system, the compound is named as

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If the root mean square velocity of hydrogen molecule at a given temperature and pressure is 2 km/s, the root...

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A small spherical ball of radius $r$, falling through a viscous medium of negligible density has terminal velocity ' $v$...

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Which of the following reaction is correct ?

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The mass of the moon is 1 / 144 times the mass of a planet and its diameter $...

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$\mathrm{C}_1$ and $\mathrm{C}_2$ are two hollow concentric cubes enclosing charges 2Q and 3Q respectively as shown in figure. The ratio...

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

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The mass number of nucleus having radius equal to half of the radius of nucleus with mass number 192

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

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A microwave of wavelength 2.0cm falls normally on a slit of width 4.0 cm. The angular spread of the central...

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If two vectors $\overrightarrow{\mathrm{A}}$ and $\overrightarrow{\mathrm{B}}$ having equal magnitude $R$ are inclined at an angle $\theta$, then

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By what percentage will the illumination of the lamp decrease if the current drops by 20% ?

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Monochromatic light of frequency $6 \times 10^{14}$ Hz is produced by a laser. The power emitted is $...

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The ascending acidity order of the following H atoms is

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A block of mass 5" " kg is placed on a rough inclined surface as shown in the figure. If...

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The bob of a pendulum was released from a horizontal position. The length of the pendulum is 10 m ....

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A cricket player catches a ball of mass 120 g moving with 25 m/s speed. If the catching process is...

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Which among the following halide/s will not show $\mathrm{S}_{\mathrm{N}} 1$ reaction:

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In a photoelectric effect experiment a light of frequency 1.5 times the threshold frequency is made to fall on the...

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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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If frequency of electromagnetic wave is 60MHz and it travels in air along z direction then the corresponding electric and...

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Given below are two statements: Statement I: Electromagnetic waves carry energy as they travel through space and this energy is...

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Two resistance of $100 \Omega$ and $200 \Omega$ are connected in series with a battery of 4 V and negligible...

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The resistance per centimeter of a meter bridge wire is r , with $\mathrm{X} \Omega$ resistance in left gap. Balancing...

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A point source is emitting sound waves of intensity $16 \times 10^{-8} \mathrm{Wm}^{-2}$ at the origin. The difference in intensity...

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A stone of mass 900 g is tied to a string and moved in a vertical circle of radius 1...

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A gas mixture consists of 8 moles of argon and 6 moles of oxygen at temperature T. Neglecting all vibrational...

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A simple pendulum is placed at a place where its distance from the earth's surface is equal to the radius...

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The temperature of a gas having $2.0 \times 10^{25}$ molecules per cubic meter at 1.38 atm (Given, $...

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Two identical charged spheres are suspended by string of equal lengths. The string make an angle of $37^{\circ}$ with each...

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Let quadratic curve passing through the point $(-1,0)$ and touching the line $y=x$ at $(1,1)$ be $y=f(x)$. Then the x-intercept...

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The speed of sound in oxygen at S.T.P. will be approximately: (Given, $\mathrm{R}=8.3 \mathrm{~J} \mathrm{~K}^{-1}, \gamma=1.4$ )

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The current of 5 A flows in a square loop of sides 1 m is placed in air. The magnetic...

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When unpolarized light is incident at an angle of $60^{\circ}$ on a transparent medium from air. The reflectec ray is...

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In an a.c. circuit, voltage and current are given by. $\mathrm{V}=100 \sin (100 \mathrm{t}) \mathrm{V}$ and $...

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A vector has magnitude same as that of $\overrightarrow{\mathrm{A}}-=3 \hat{\jmath}+4 \hat{\jmath}$ and is parallel to $\overrightarrow{\mathrm{B}}=4 \hat{\imath}+3 \hat{\jmath}$. The $x$...

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In an experiment to measure the focal length (f) of a convex lens, the magnitude of object distance (x) and...

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A physical quantity $Q$ is found to depend on quantities $a, b, c$ by the relation $Q=\frac{a^4 b^3}{c^2}$. The percentage...

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An $A C$ voltage $V=20 \sin 200 \pi t$ is applied to a series $L C R$ circuit which drives...

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Two discs of moment of inertia $I_1=4 \mathrm{~kg} \mathrm{~m}^2$ and $\mathrm{I}_2=2 \mathrm{~kg} \mathrm{~m}^2$ about their central axes \& normal to...

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The magnetic field at the centre of a wire loop formed by two semicircular wires of radii $\mathrm{R}_1=2 \pi \mathrm{~m}$...

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The truth table for this given circuit is :

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A big drop is formed by coalescing 1000 small identical drops of water. If $E_1$ be the total surface energy...

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Force between two point charges $\mathrm{q}_1$ and $\mathrm{q}_2$ placed in vacuum at ' $r$ ' cm apart is $F$. Force...

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A power transmission line feeds input power at 2.3 kV to a step down transformer with its primary winding having...

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Projectiles A and B are thrown at angles of $45^{\circ}$ and $60^{\circ}$ with vertical respectively from top of a 400...

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The measured value of the length of a simple pendulum is 20" " cm with 2" " mm accuracy. The...

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A heavy iron bar of weight 12 kg is having its one end on the ground and the other on...

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A uniform magnetic field of $2 \times 10^{-3} \mathrm{~T}$ acts along positive Y -direction. A rectangular loop of sides 20...

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Match List I with List II

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Two sources of light emit with a power of 200" " W. The ratio of number of photons of visible...

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

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An object is placed in a medium of refractive index 3 . An electromagnetic wave of intensity $...

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When a potential difference V is applied across a wire of resistance R, it dissipates energy at a rate W....

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Three blocks A, B and C are pulled on a horizontal smooth surface by a force of 80" " N...

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When a polaroid sheet is rotated between two crossed polaroids then the transmitted light intensity will be maximum for a...

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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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If three moles of monoatomic gas $\left(\gamma=\frac{5}{3}\right)$ is mixed with two moles of a diatomic gas $\left(\gamma=\frac{7}{5}\right)$, the value of...

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In the given circuit, the voltage across load resistance ( $R_L$ ) is:

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The threshold frequency of a metal with work function 6.63eV is :

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During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute...

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Primary side of a transformer is connected to 230 V,50 Hz supply. Turns ratio of primary to secondary winding is...

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If mass is written as $\mathrm{m}=\mathrm{kc}^{\mathrm{P}} \mathrm{G}^{-1 / 2} \mathrm{~h}^{1 / 2}$ then the value of P will be :...

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A particle of charge ${ }^{\prime}-q$ ' and mass ${ }^{\prime} m$ ' moves in a circle of radius $...

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Escape velocity of a body from earth is 11.2" " km/s. If the radius of a planet be one-third the...

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A beam of unpolarised light of intensity I_0 is passed through a polaroid A and then through another polaroid B...

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If the total energy transferred to a surface in time $t$ is $6.48 \times 10^5 \mathrm{~J}$, then the magnitude of...

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A block of mass $m$ is placed on a surface having vertical cross section given by $y=x^2 / 4$. If...

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An alternating voltage $V(t)=220 \sin 100 \pi t$ volt is applied to a purely resistive load of $50 \Omega$. The...

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An electron revolving in $\mathrm{n}^{\text {th }}$ Bohr orbit has magnetic moment $\mu_n$. If $\mu_n \alpha n^x$, the value of...

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Choose the correct statement for processes A & B shown in figure.

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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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From the statements given below : (A) The angular momentum of an electron in orbit is an integral multiple of...

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The total kinetic energy of 1 mole of oxygen at $27^{\circ} \mathrm{C}$ is: [Use universal gas constant $(\mathrm{R})=8.31 \mathrm{~J} /$...

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In a nuclear fission reaction of an isotope of mass $M$, three similar daughter nuclei of same mass are formed....

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Three voltmeters, all having different internal resistances are joined as shown in figure. When some potential difference is applied across...

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To measure the temperature coefficient of resistivity $\alpha$ of a semiconductor, an electrical arrangement shown in the figure is prepared....

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A ball suspended by a thread swings in a vertical plane so that its magnitude of acceleration in the extreme...

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The atomic mass of ${ }_6 \mathrm{C}^{12}$ is 12.000000 u and that of ${ }_6 \mathrm{C}^{13}$ is 13.003354 u ....

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A current of $200 \mu \mathrm{~A}$ deflects the coil of a moving coil galvanometer through $60^{\circ}$. The current to cause...

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The truth table of the given circuit diagram is :

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In an ammeter, 5 % of the main current passes through the galvanometer. If resistance of the galvanometer is G...

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For the photoelectric effect, the maximum kinetic energy $\left(E_k\right)$ of the photoelectrons is plotted against the frequency (v) of the...

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Given below are two statements : Statement (I) : The limiting force of static friction depends on the area 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 block of mass 1" " kg is pushed up a surface inclined to horizontal at an angle of 60^∘...

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Wheatstone bridge principle is used to measure the specific resistance $\left(S_1\right)$ of given wire, having length L , radius r...

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If 50 Vernier divisions are equal to 49 main scale divisions of a travelling microscope and one smallest reading of...

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Let $g(x)=f(x)+f(1-x)$ and $f^{\prime \prime}(x)>0, x \in(0,1)$, If $g$ is decreasing in the interval ( $0, \alpha$ ) and increasing...

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The equation of state of a real gas is given by $\left(P+\frac{a}{V^2}\right)(V-b)=R T$, where $P, V$ and $T$ are pressure....

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There are two vessels filled with an ideal gas where volume of one is double the volume of other. The...

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The set of all $a \in \mathbb{R}$ for which the equation $x|x-1|+|x+2|+a=0$ has exactly one real root is :

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$\max _{0 \leq x \leq \pi}\left\{x-2 \sin x \cos x+\frac{1}{3} \sin 3 x\right\}=$

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The set of all $a \in \mathbb{R}$ for which the equation $x|x-1|+|x+2|+a=0$ has exactly one real root is :

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$\max _{0 \leq x \leq \pi}\left\{x-2 \sin x \cos x+\frac{1}{3} \sin 3 x\right\}$

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A square piece of tin of side 30 cm is to be made into a box without top by cutting...

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A particle is placed at the point A of a frictionless track ABC as shown in figure. It is gently...

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In an alpha particle scattering experiment distance of closest approach for the $$ \alpha $$ particle is $...

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A parallel beam of monochromatic light of wavelength 600nm passes through single slit of 0.4mm width. Angular divergence corresponding to...

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Three vectors $\overrightarrow{\mathrm{OP}}, \overrightarrow{\mathrm{OQ}}$ and $\overrightarrow{\mathrm{OR}}$ each of magnitude A are acting as shown in figure. The resultant of the...

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A closed and an open organ pipe have same lengths. If the ratio of frequencies of their seventh overtones is...

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A liquid column of height 0.04cm balances excess pressure of soap bubble of certain radius. If density of liquid is...

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An electric field, $\overrightarrow{\mathrm{E}}=\frac{2 \hat{\mathrm{i}}+6 \hat{\mathrm{j}}+8 \hat{\mathrm{k}}}{\sqrt{6}}$ passes through the surface of $4 \mathrm{~m}^2$ area having unit vector $\hat{n}=\left(\frac{2 \hat{i}+\hat{j}+\hat{k}}{\sqrt{6}}\right)$...

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Resistance of a wire at $0^{\circ} \mathrm{C}, 100^{\circ} \mathrm{C}$ and $t^{\circ} \mathrm{C}$ is found to be$10 \Omega, 10.2 \Omega$ and...

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A square loop PQRS having 10 turns, area $3.6 \times 10^{-3} \mathrm{~m}^2$ and resistance 100Ω is slowly and uniformly being...

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An electron with kinetic energy 5eV enters a region of uniform magnetic field of 3μT perpendicular to its direction. An...

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A uniform thin metal plate of mass with dimensions is shown. The ratio of x and y coordinates of center...

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In Young's double slits experiment, the position of 5th bright fringe from the central maximum is 5 cm. The distance...

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The diameter of a sphere is measured using a vernier caliper whose 9 divisions of main scale are equal to...

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Critical angle of incidence for a pair of optical media is $45^{\circ}$.. The refractive indices of first and second media...

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A stationary particle breaks into two parts of masses $\mathrm{m}_{\mathrm{A}}$ and $\mathrm{m}_{\mathrm{B}}$ which move with velocities $v_A$ and $v_B$ respectively....

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A player caught a cricket ball of mass 150 g moving at a speed of 20 m/s. If the catching...

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Correct Bernoulli's equation is (symbols have their usual meaning) :

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If $\sin x = - \frac{3}{5}$, where $\pi < x < \frac{{3\pi }}{2}$, then $...

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Let f:(0,π)→R be a function given by Where a,b∈Z. If f is continuous at $\mathrm{x}=\frac{\pi}{2}$, then $\mathrm{a}^2+\mathrm{b}^2$ is equal to

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Let A={2,3,6,7} and B={4,5,6,8}. Let R be a relation defined on A×B by $(a_1,b_1 )R(a_2,b_2 ) $ is and only...

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If a function f satisfies f(m+n)=f(m)+f(n) for all m,n∈N and f(1)=1, then the largest natural number λ such that $...

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Let the centre of a circle, passing through the point (0,0),(1,0) and touching the circle $x^2+y^2$ =9, be (h,k). Then...

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Let A be a non-singular matrix of order 3. If $\operatorname{det}(3 \operatorname{adj}(2 \operatorname{adj}((\operatorname{det} A) A)))=3^{-13} \cdot 2^{-10}$ and det $...

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The remainder when $428^{2024}$ is divided by 21 is

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Let $...

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Let the set of all positive values of $\lambda$, for which the point of local minimum of the function $\left(1+x\left(\lambda^2-x^2\right)\right)$...

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The sum of the square of the modulus of the elements in the set {z=a+ib:a,b∈Z,z∈C,|z-1|≤1,|z-5|≤|z-5i|} is

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Let a,b and c denote the outcome of three independent rolls of a fair tetrahedral die, whose four faces are...

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A message signal of frequency 5 kHz is used to modulate a carrier signal of frequency 2 MHz. The bandwidth...

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The ratio of the density of oxygen nucleus and helium nucleus is

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Let $f(x)=x^2+9, g(x)=\frac{x}{x-9}$ and $a=\operatorname{fog}(10), b=\operatorname{gof}(3)$. If e and 1 denote the eccentricity and the length of the latus rectum...

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Let $\overrightarrow{\mathrm{a}}=2 \hat{\imath}-3 \hat{\jmath}+4 \hat{\mathrm{k}}, \overrightarrow{\mathrm{b}}=3 \hat{\imath}+4 \hat{\jmath}-5 \hat{\mathrm{k}}$, and a vector $\vec{c}$ be such that $...

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In an LC oscillator, if values of inductance and capacitance become twice and eight times, respectively, then the resonant frequency...

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Let α,β be the roots of the equation $x^2+2 \sqrt{2} x-1=0$. . The quadratic equation, whose roots are $\alpha^4+\beta^4$ and...

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Match List I with List II

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Let three vectors $\vec{a}=\alpha \hat{\imath}+4 \hat{\jmath}+2 \hat{k}, \vec{b}=5 \hat{\imath}+3 \hat{\jmath}+4 \hat{k}, \vec{c}=x \hat{\imath}+y \hat{\jmath}+z \hat{k}$ from a triangle such that...

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The root mean square velocity of molecules of gas is (1) Proportional to square of temperature $\left(\mathrm{T}^2\right)$. (2) Inversely proportional...

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Let the first term of a series be $\mathrm{T}_1=6$ and its $\mathrm{r}^{\text {th }}$ term $T_r=3 T_{r-1}+6^r, r=2,3, \ldots, n$....

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A parallel plate capacitor has plate area 40 cm2 and plates separation 2 mm. The space between the plates is...

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If the second, third and fourth terms in the expansion of $(x+y)^n$ are 135,30 and $\frac{10}{3}$, respectively, then $6\left(n^3+x^2+y\right)$ is...

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A car travels a distance of 'x' with speed V1 and then same distance 'x' with speed V2 in the...

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Let $L_1, L_2$ be the lines passing through the point $P(0,1)$ and touching the parabola $9 x^2+12 x+18 y- 14=0$....

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Assume that the earth is a solid sphere of uniform density and a tunnel is dug along its diameter throughout...

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T is the time period of simple pendulum on the earth's surface. Its time period becomes x T when taken...

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The solution of the differential equation $\left(x^2+y^2\right) d x-5 x y d y=0, y(1)=0$, is :

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Let $\mathrm{x}_1, \mathrm{x}_2, \mathrm{x}_3, \mathrm{x}_4$ be the solution of the equation $4 x^4+8 x^3-17 x^2-12 x+9=0$ and $\left(4+x_1^2\right)\left(4+x_2^2\right)(4+ \left.x_3^2\right)\left(4+x_4^2\right)=\frac{125}{16} m$....

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A Carnot engine with efficiency 50% takes heat from a source at 600 K. In order to increase the efficiency...

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The frequency distribution of the age of students in a class of 40 students is given below. If the mean...

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An object of mass 8 kg is hanging from one end of a uniform rod CD of mass 2 kg...

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The value of $\lim _{x \rightarrow 0} 2\left(\frac{1-\cos x \sqrt{\cos 2 x} \sqrt[3]{\cos 3 x} \ldots \ldots 10}{x^2}\right)$ is

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The shortest distance between the line $\frac{x-3}{4}=\frac{y+7}{-11}=\frac{z-1}{5}$ and $\frac{x-5}{3}=\frac{y-9}{-6}=\frac{z+2}{1}$ is :

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Electron beam used in an electron microscope, when accelerated by a voltage of 20 kV. has a de–Broglie wavelength of...

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Let the area of the region enclosed by the curve $y=\min \{\sin x, \cos x\}$ and the $x$-axis between $x=-\pi$...

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Let $r_k=\frac{\int_0^1\left(1-x^7\right)^k d x}{\int_0^1\left(1-x^7\right)^{k+1} d x}, k \in N$. Then the value of $\sum_{\mathrm{k}=1}^{10} \frac{1}{7\left(\mathrm{r}_{\mathrm{k}}-1\right)}$ is equal to $\_\_\_\_$

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Suppose $A B$ is a focal chord of the parabola $y^2=12 x$ of length $l$ and slope $m

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Let a circle passing through (2,0) have its centre at the point (h,k). Let $\left(x_c, y_c\right)$ be the point of...

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The number of distinct real roots of the equation $|x||x+2|-5|x+1|-1=0$ is

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If $\int_0^{\frac{\pi}{4}} \frac{\sin ^2 x}{1+\sin x \cos x} d x=\frac{1}{a} \log _e\left(\frac{a}{3}\right)+\frac{\pi}{b \sqrt{3}}$, where $a, \mathrm{~b} \in \mathrm{~N}$, then $\mathrm{a}+\mathrm{b}$...

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Let a conic C pass through the point (4,-2) and P(x,y),x≥3, be any point on C. Let the slope of...

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Let $\vec{a}=9 \hat{\imath}-13 \hat{\jmath}+25 k, b=3 \hat{\imath}+7 \hat{\jmath}-13 k$ and $\overrightarrow{\mathrm{c}}=17 \hat{\imath}-2 \hat{\jmath}+\mathrm{k}$ be three given vectros. If $\overrightarrow{\mathrm{r}}$ is...

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The mass defect in a particular reaction is 0.4 g . The amount of energy liberated is $...

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Let $\vec{a}=\hat{i}-3 \hat{j}+7 k \hat{k}=2 \hat{i}-\hat{j}+k$ and $\vec{c}$ be a vector such that $(\vec{a}+2 \vec{b}) \times \vec{c}=3(\vec{c} \times \vec{a})$. If...

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Let $f(x)=a x^3+b x^2+e x+41$ be such that $f(1)=40, f^{\prime}(1)=2$ and $f^{\prime \prime}(1)=4$. Then $a^2+b^2+c^2$ is equal to :

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Let ABC be a triangle of area $15 \sqrt{2}$ and the vectors $\overrightarrow{\mathrm{AB}}=\hat{\imath}+2 \hat{\jmath}-7 \hat{k}, \overrightarrow{\mathrm{BC}}=a \hat{\imath}+b \hat{\jmath}+c \hat{k}$ and...

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A particle performs simple harmonic motion with amplitude A. Its speed is increased to three times at an instant when...

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Let αβγ=45;α,β,γ∈R. If x(α,1,2)+y(1,β,2) +z(2,3,γ)=(0,0,0) for some x,y,z∈R,xyz≠ 0, then 6α+4β+γ is equal to_____.

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Let $a_1, a_2, a_3, \ldots$ be in an arithmetic progression of positive terms. Let $...

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Let the length of the focal chord $P Q$ of the parabola $\mathrm{y}^2=12 \mathrm{x}$ be 15 units. If the distance...

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If the sum of series $\frac{1}{1 \cdot(1+d)}+\frac{1}{(1+d)(1+2 d)}+\cdots \ldots+\frac{1}{(1+9 d)(1+10 d)}$ is equal to 5 , then 50 d is...

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The depth below the surface of sea to which a rubber ball be taken so as to decrease its volume...

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Let $f$ be a differentiable function in the interval $(0, \infty)$ such that $f(1)=1$ and $...

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Let $\mathrm{f}:(-\infty, \infty)-\{0\} \rightarrow \mathrm{R}$ be a differentiable function such that $f^{\prime}(1)=\lim _{a \rightarrow \infty} a^2 f\left(\frac{1}{a}\right)$. Then $...

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If the domain of the function $f(x)=\sin ^{-1}\left(\frac{x-1}{2 x+3}\right)$ is $R-(\alpha, \beta)$ then $12 \alpha \beta$ is equal to :

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A small square loop of wire of side $\ell$ is placed inside a large square loop of wire of side...

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Let $A$ be a $3 \times 3$ matrix of non-negative real elements such that $...

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For the function $f(x)=(\cos x)-x+1, x \in \mathbb{R}$, between the following two statements (S1) $f(x)=0$ for only one value of...

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If $S=\{a \in R:|2 a-1|=3[a]+2\{a\}\}$, where $[t]$ denotes the greatest integer less than or equal to $t$ and $\{t\}$ represents...

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Let a $$ \begin{aligned} t a=1+\frac{{ }^2 C_2}{3!}+\frac{{ }^3 C_2}{4!}+\frac{{ }^4 C_2}{5!}+\cdots, & \\ & \quad b=1+\frac{{ }^1 C_0+{ }^1...

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Two waves of intensity ratio $1: 9$ cross each other at a point. The resultant intensities at the point, when...

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Let $\alpha=\sum_{\mathrm{r}=0}^{\mathrm{n}}\left(4 \mathrm{r}^2+2 \mathrm{r}+1\right)^{\mathrm{n}} \mathrm{C}_{\mathrm{r}}$ and $\beta=\left(\sum_{r=0}^n \frac{{ }^n C_r}{r+1}\right)+\frac{1}{n+1}$. If $140

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Let $\overrightarrow{\mathrm{OA}}=2 \overrightarrow{\mathrm{a}}, \overrightarrow{\mathrm{OB}}=6 \overrightarrow{\mathrm{a}}+5 \overrightarrow{\mathrm{~b}}$ and $\overrightarrow{\mathrm{OC}}=3 \overrightarrow{\mathrm{~b}}$, where O is the origin. If the area of the parallelogram...

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A body starts falling freely from height H hits an inclined plane in its path at height h. As a...

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If the range of $f(\theta)=\frac{\sin ^4 \theta+3 \cos ^2 \theta}{\sin ^4 \theta+\cos ^2 \theta}, \theta \in \mathbb{R}$ is $[\alpha, \beta]$,...

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The number of ways of getting a sum 16 on throwing a dice four times is

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A solid circular disc of mass 50" " kg rolls along a horizontal floor so that its center of mass...

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Let $|\cos \theta \cos (60-\theta) \cos (60-\theta)| \leq \frac{1}{8}, \theta \in[0,2 \pi]$ Then, the sum of all $\theta \in[0,2 \pi]$,...

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Let the positive integers be written in the form : If the k^"th " row contains exactly k numbers for...

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Let $A$ be a square matrix of order 2 such that $|A|=2$ and the sum of its diagonal elements is...

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Let $\mathrm{y}=\mathrm{y}(\mathrm{x})$ be the solution of the differential equation $...

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The area of the region enclosed by the parabolas $y=x^2-5 x$ and $y=7 x-x^2$ is

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Equivalent resistance of the following network is Ω.

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If the shortest distance between the lines $\frac{x+2}{2}=\frac{y+3}{3}=\frac{z-5}{4}$ and $\frac{x-3}{1}=\frac{y-2}{-3}=\frac{z+4}{2}$ is $\frac{38}{3 \sqrt{5}} \mathrm{k}$ and $\int_0^{\mathrm{k}}\left[\mathrm{x}^2\right] \mathrm{dx}=\alpha- \sqrt{\alpha}$, where $[\mathrm{x}]$...

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A variable line L passes through the point (3,5) and intersects the positive coordinate axes at the points A and...

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The number of 3-digit numbers, formed using the digits 2, 3, 4, 5 and 7, when the repetition of digits...

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Let $\int \frac{2-\tan x}{3+\tan x} d x=\frac{1}{2}\left(\alpha x+\log _e|\beta \sin x+\gamma \cos x|\right)+C$, where C is the constant of integration....

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A parallel plate capacitor with plate separation 5 mm is charged up by a battery. It is found that on...

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Let $\mathrm{y}=\mathrm{y}(\mathrm{x})$ be the solution of the differential equation $\left(1+x^2\right) \frac{d y}{d x}+y=e^{\tan ^{-1} x}, \mathrm{y}(1)=0$. Then $\mathrm{y}(0)$ is $\_\_\_\_$...

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Three balls are drawn at random from a bag containing 5 blue and 4 yellow balls. Let the random variables...

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Let the solution $y=y(x)$ of the differential equation $\frac{d y}{d x}-y=1+4 \sin x$ satisfy $y(\pi)=1$. Then $y\left(\frac{\pi}{2}\right)+$ 10 is equal...

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If the constant term in the expansion of (1+2x-3x^3 ) (3/2 x^2-1/3x)^9 is p, then 108p is equal to

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An electron moves through a uniform magnetic field B ⃗=B_0 i ˆ+2B_0 j ˆT. At a particular instant of time,...

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If the orthocentre of the triangle formed by the lines 2x+3y-1=0,x+2y-1=0 and ax + by -1=0, is the centroid of...

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In a survey of 220 students of a higher secondary school, it was found that at least 125 and at...

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The coefficient of $x^{70}$ in $x^2(1+x)^{98}+x^3(1+x)^{97}+\mathrm{x}^4(1+\mathrm{x})^{96}++x^{54}(1+x)^{46}$ is ${ }^{99} \mathrm{C}_{\mathrm{p}}-{ }^{46} \mathrm{C}_{\mathrm{q}}$. Then a possible value to p+q is :

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When a metal surface is illuminated by light of wavelength λ, the stopping potential is 8" " V. When the...

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From a lot of 10 items, which include 3 defective items, a sample of 5 items is drawn at random....

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Let $A=\left[\begin{array}{cc}2 & -1 \\ 1 & 1\end{array}\right]$. If the sum of the diagonal elements of $A^{13}$ is $3^n$, then...

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A circle in inscribed in an equilateral triangle of side of length 12. If the area and perimeter of any...

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If $\lim _{x \rightarrow 1} \frac{(5 x+1)^{1 / 3}-(x+5)^{1 / 3}}{(2 x+3)^{1 / 2}-(x+4)^{1 / 2}}=\frac{m \sqrt{5}}{n(2 n)^{2 / 3}}$,...

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Let $\lambda, \mu \in R$. If the system of equations $3 x+5 y+\lambda z=3$ 7x+11y-9z=2 $97 x+155 y-189 z=\mu$ has...

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If the line (2-x)/3=(3y-2)/(4λ+1)=4-z makes a right angle with the line (x+3)/3μ=(1-2y)/6=(5-z)/7, then 4λ+9μ is equal to :

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An artillery piece of mass M_1 fires a shell of mass M_2 horizontally. Instantaneously after the firing, the ratio of...

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Let $\mathrm{H}: \frac{-\mathrm{x}^2}{\mathrm{a}^2}+\frac{\mathrm{y}^2}{\mathrm{~b}^2}=1$ be the hyperbola, whose eccentricity is $\sqrt{3}$ and the length of the latus rectum is $4 \sqrt{3}$....

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Let $\alpha \in(0, \infty)$ and $...

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A ray of light coming from the point P(1,2) gets reflected from the point Q on the x-axis and then...

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Let $y=y(x)$ be the solution of the differential equation $\left(1+y^2\right) e^{\tan x} d x+\cos ^2 x\left(1+e^{2 \tan x}\right) d y=0$,...

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The value of ∫_(-π)^π (2y(1+sin⁡y))/(1+〖cos〗^2⁡y) dy is :

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Two conductors have the same resistances at but their temperature coefficients of resistance are and . The respective temperature coefficients...

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Let $f(\mathrm{x})=\mathrm{x}^5+2 \mathrm{e}^{\mathrm{x} / 4}$ for all $\mathrm{x} \in \mathrm{R}$. Consider a function $g(x)$ such that (gof) $(x)=x$ for all...

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The set of all $\alpha$, for which the vector $\vec{a}=\alpha t \hat{\imath}+6 \hat{\jmath}-3 \hat{k}$ and $...

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A coin is placed on a disc. The coefficient of friction between the coin and the disc is μ. If...

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If A(1,-1,2),B(5,7,-6),C(3,4,-10) and D(-1,-4,-2) are the vertices of a quadrilateral ABCD, then its area is

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The solution curve, of the differential equation $2 y \frac{d y}{d x}+3=5 \frac{d y}{d x}$ , passing through the point...

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If the domain of the function $\sin ^{-1}\left(\frac{3 x-22}{2 x-19}\right)+\log _e\left(\frac{3 x^2-8 x+5}{x^2-3 x-10}\right)$ is $(\alpha, \beta]$, then $...

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A small steel ball is dropped into a long cylinder containing glycerine. Which one of the following is the correct...

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Let f(x)=x^5+2x^3+3x+1,x∈R, and g(x) be a function such that g(f(x))=x for all x∈R. Then (g(7))/(g^' (7)) is equal to :

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Let the relations $R_1$ and $R_2$ on the set X={1,2,3,…,20} be given by $R_1$={(x,y):2x-3y=2} and $R_2$={(x,y):-5x+4y=0}. If M and N...

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The parabola $y^2=4 x$ divides the area of the circle $x^2+y^2=5$ in two parts. The area of the smaller part...

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The fundamental frequency of a closed organ pipe is equal to the first overtone frequency of an open organ pipe....

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A square is inscribed in the circle $x^2+y^2-10 x-6 y+30=0$. One side of this square is parallel to $y= x+3$....

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If the set $\mathrm{R}=\{(\mathrm{a}, \mathrm{b}) ; \mathrm{a}+5 \mathrm{~b}=42, \mathrm{a}, \mathrm{b} \in \mathbb{N}\}$ has $m$ elements and $\sum_{n=1}^m\left(1+i^{n!}\right)=x+i y$, where $\mathrm{I}=\sqrt{-1}$,...

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If 1/(√1+√2)+1/(√2+√3)+⋯+1/(√99+√100)=m and 1/(1⋅2)+1/(2⋅3)+⋯+1/(99⋅100)=n, then the point (m,n) lies on the line

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Let, $\alpha, \beta$ be the distinct roots of the equation $\mathrm{x}^2-\left(\mathrm{t}^2-5 \mathrm{t}+6\right) \mathrm{x}+1=0, \mathrm{t} \in \mathrm{R}$ and $\mathrm{a}_{\mathrm{n}}=\alpha^{\mathrm{n}}+\beta^{\mathrm{n}}$ Then the...

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Let $z$ be a complex number such that $|z+2|=1$ and $\operatorname{lm}\left(\frac{z+1}{z+2}\right)=\frac{1}{5}$. Then the value of $|\operatorname{Re}(\overline{z+2})|$ is :

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Let the point, on the line passing through the points $\mathrm{P}(1,-2,3)$ and $\mathrm{Q}(5,-4,7)$, farther from the origin and at a...

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Let the line L intersect the lines x-2=-y=z-1,2(x+1)=2(y-1)=z+1 and be parallel to the line $\frac{x-2}{3}=\frac{y-1}{1}=\frac{z-2}{2}$. Then which of the following...

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A coil is placed perpendicular to a magnetic field of 5000" " T. When the field is changed to 3000"...

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Suppose θ∈[0,π/4] is a solution of 4cos⁡θ-3sin⁡θ=1. Then cos⁡θ is equal to :

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A company has two plants A and B to manufacture motorcycles. 60% motorcycles are manufactured at plant A and the...

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Let $[t]$ be the greatest integer less than or equal to t. Let $A$ be the set of al prime...

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In the given arrangement of a doubly inclined plane two blocks of masses M and m are placed. The blocks...

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Let $\alpha$ and $\beta$ be the sum and the product of all the non-zero solutions of the equation $...

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Consider the following two statements Statement I: For any two non-zero complex numbers $z_1, z_2\left(\left|z_1\right|+\left|z_2\right|\right)\left|\frac{z_1}{\left|z_1\right|}+\frac{z_2}{\left|z_2\right|}\right| \leq 2\left(\left|z_1\right|+\left|z_2\right|\right)$ and Statement II:...

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The equations of two sides AB and AC of a triangle $A B C$ are $4 x+y=14$ and $...

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If 2 and 6 are the roots of the equation $\mathrm{ax}^2+\mathrm{bx}+1=0$, then the quadratic equation, whose roots are $\frac{1}{2 a+b}$...

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The shortest distance between the lines $\frac{x-3}{2}=\frac{y+15}{-7}=\frac{z-9}{5}$ and $\frac{x+1}{2}=\frac{y-1}{1}=\frac{z-9}{-3}$ is $\_\_\_\_$

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Two charges q and 3q are separated by a distance ' $r$ ' in air. At a distance $x$ from...

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For three vectors $\vec{A}=(-x \hat{\imath}-6 \hat{\jmath}-2 \hat{k}), \vec{B}=(-\hat{\imath}+4 \hat{\jmath}+3 \hat{k})$ and $\vec{C}=(-8 \hat{\imath}-\hat{\jmath}+3 \hat{k})$, if $\overrightarrow{\mathrm{A}} \cdot(\overrightarrow{\mathrm{B}} \times \overrightarrow{\mathrm{C}})=0$, them...

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Let $I(x)=\int \frac{6}{\sin ^2 x(1-\cot x)^2} d x$. If $I(0)=3$, then $I\left(\frac{\pi}{12}\right)$ is equal to :

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A particle is doing simple harmonic motion of amplitude 0.06 m and time period 3.14 s. The maximum velocity of...

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Let a,b∈R. Let the mean and the variance of 6 observations -3,4,7,-6,a,b be 2 and 23 , respectively. The mean...

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A force is represented by $F=a x^2+b t^{1 / 2}$ Where $\mathrm{x}=$ distance and $\mathrm{t}=$ time. The dimensions of $...

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A circular coil having 200 turns, $2.5 \times 10^{-4} \mathrm{~m}^2$ area and carrying 100$\mu \mathrm{A}$ current is placed in a...

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For α,β∈R and a natural number n, let

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Let the line 2x+3y-k=0,k>0, intersect the x-axis and y-axis at the points A and B, respectively. If the equation of...

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Let the first three terms $2, p$ and $q$, with $q \neq 2$, of a G.P. be respectively the $...

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In a plane EM wave, the electric field oscillates sinusoidally at a frequency of $5 \times 10^{10} \mathrm{~Hz}$ and an...

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Radius of a certain orbit of hydrogen atom is 8.48Å. If energy of electron in this orbit is E/x, then...

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Let a circle C of radius 1 and closer to the origin be such that the lines passing through the...

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Let a unit vector which makes an angle of $60^{\circ}$ with $2 \hat{\imath}+2 \hat{\jmath}-\hat{k}$ and an angle of $45^{\circ}$ with...

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Let C be the circle of minimum area touching the parabola $y=6-x^2$ and the lines y=√3|x|. Then, which one of...

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If the percentage errors in measuring the length and the diameter of a wire are 0.1% each. The percentage error...

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Let the sum of two positive integers be 24 . If the probability, that their product is not less than...

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The given figure represents two isobaric processes for the same mass of an ideal gas, then

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A wire of resistance R and radius r is stretched till its radius became r/2. If new resistance of the...

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The sum of all rational terms in the expansion of $\left(2^{\frac{1}{5}}+5^{\frac{1}{3}}\right)^{15}$ is equal to :

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Let A={n∈[100,700]∩N:n is neither a multiple of 3 nor a multiple of 4}. Then the number of elements in A...

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The refractive index of prism is $\mu=\sqrt{3}$ and the ratio of the angle of minimum deviation to the angle of...

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If the shortest distance between the lines L_1:r ⃗=(2+λ)i ˆ+(1-3λ)j ˆ+(3+4λ)k ˆ,λ∈R L_2:r ⃗=2(1+μ)i ˆ+3(1+μ)j ˆ+(5+μ)k ˆ,μ∈R is m/√n, where...

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Let $A$ and $B$ be two square matrices of order 3 such that $|A|=3$ and $|B|=2$. Then $...

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Four identical particles of mass $m$ are kept at the four corners of a square. If the gravitational force exerted...

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When a dc voltage of 100V is applied to an inductor, a de current of 5A flows through it. When...

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Let $A=\left[\begin{array}{lll}2 & a & 0 \\ 1 & 3 & 1 \\ 0 & 5 & b\end{array}\right]$. If $...

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The function $f(x)=\frac{x^2+2 x-15}{x^2-4 x+9}, x \in R$ is $\_\_\_\_$ .

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Four identical particles of mass $m$ are kept at the four corners of a square. If the gravitational force exerted...

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Let λ,μ∈R. If the system of equations 3x+5y+λz=3 7x+11y-9z=2 97x+155y-189z=μ has infinitely many solutions, then μ+2λ is equal to :

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A big drop is formed by coalescing 1000 small droplets of water. The ratio of surface energy of 1000 droplets...

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Let $f(x)=4 \cos ^3 x+3 \sqrt{3} \cos ^2 x-10$. The number of points of local maxima of $f$ in interval...

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Let $f(x)$ be a positive function such that the area bounded by $y=f(x), y=0$ from $x=0$ to $x=a>0$ is $...

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The integral $\int_0^{\frac{\pi}{4}} \frac{136 \sin x}{3 \sin x+5 \cos x} d x$ is equal to :

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Three infinitely long charged thin sheets are placed as shown in figure. The magnitude of electric field at the point...

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The mean and standard deviation of 20 observations are found to be 10 and 2, respectively. On respectively, it was...

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If the wavelength of the first member of Lyman series of hydrogen is λ. The wavelength of the second member...

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If the radius of earth is reduced to three-fourth of its present value without change in its mass then value...

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The number of critical points of the function $f(x)=(x-2)^{2 / 3}(2 x+1)$ is:

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$\int_0^{\pi / 4} \frac{\cos ^2 x \sin ^2 x}{\left(\cos ^3 x+\sin ^3 x\right)^2} d x$ is equal to $\_\_\_\_$

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If the function $f(x)=\frac{\sin 3 x+\alpha \sin x-\beta \cos 3 x}{x^3}, x \in R$, is continuous at $x=0$, then $f(0)$...

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In photoelectric experiment energy of 2.48eV irradiates a photo sensitive material. The stopping potential was measured to be 0.5 V....

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A rigid wire consists of a semicircular portion of radius R and two straight sections. The wire is partially immerged...

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Let $\mathrm{P}(\mathrm{x}, \mathrm{y}, \mathrm{z})$ be a point in the first octant, whose projection in the xy -plane is the point...

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A small ball of mass m and density $\rho$ is dropped in a viscous liquid of density $\rho_0$. After sometime,...

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Let $A=\{1,3,7,9,11\}$ and $B=\{2,4,5,7,8,10,12\}$. Then the total number of one-one maps $f: A \rightarrow B$, such that $f(1)+f(3)=14$, is :

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If $\mathrm{A}(3,1,-1), \mathrm{B}\left(\frac{5}{3}, \frac{7}{3}, \frac{1}{3}\right), \mathrm{C}(2,2,1)$ and $\mathrm{D}\left(\frac{10}{3}, \frac{2}{3}, \frac{-1}{3}\right)$ are the vertices of a quadrilateral ABCD , then its...

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Let the circles $C_1:(x-\alpha)^2+(y-\beta)^2=r_1^2$ and $C_2:(x-8)^2+\left(y-\frac{15}{2}\right)^2=r_2^2$ touch each other externally at the point $(6,6)$. If the point $(6,6)$ divides the...

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The refractive index of a prism with apex angle A is cot⁡A/2. The angle of minimum deviation is :

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An element $\Delta l=\Delta x \hat{i}$ is placed at the origin and carries a large current I=10 A. The magnetic...

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The sum of all the solutions of the equation $(8)^{2 x}-16 \cdot(8)^x+48=0$ is is:

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If the system of equations has infinitely many solutions, then $\lambda^4-\mu$ is equal to:

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$$ \text { The relation between time ' } t \text { ' and distance ' } x \text {...

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A train starting from rest first accelerates uniformly up to a speed of 80 km/h for time t, then it...

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The value of $k \in \mathbb{N}$ for which the integral $I_n=\int_0^1\left(1-x^k\right)^n d x, n \in \mathbb{N}$, satisfies $147 I_{20}=148 I_{21}$...

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If $f(x)=\left\{\begin{array}{cc}x^3 \sin \left(\frac{1}{x}\right), & x \neq 0 \\ 0, & x=0\end{array}\right.$, then

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Four particles A, B, C, D of mass$\frac{m}{2}, m, 2 m, 4 m$, have same momentum, respectively. The particle with...

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For the function f(x)=sin⁡x+3x-2x2+x, where x0,2, consider the following two statements : (I) f is increasing in 0,2. (II) f'...

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There are 5 points $\mathrm{P}_1, \mathrm{P}_2, \mathrm{P}_3, \mathrm{P}_4, \mathrm{P}_5$ on the side AB , excluding A and B , of...

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Let $\vec{a}, \vec{b}$ and $\overrightarrow{\mathrm{c}}$ be three non-zero vectors such that $\vec{b}$ and $\vec{c}$ are non-collinear if $\vec{a}+5 \vec{b}$is collinear...

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If the system of equations $$ \begin{aligned} & x+(\sqrt{2} \sin \alpha) y+(\sqrt{2} \cos \alpha) z=0 \\ & \mathrm{x}+(\cos \alpha) \mathrm{y}+(\sin...

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If y=y(x) is the solution of the differential equation dydx+2y=sin⁡(2x),y(0)=34, then y8 is equal to :

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One of the points of intersection of the curves $y=1+3 x-2 x^2$ and $y=\frac{1}{x}$ is $\left(\frac{1}{2}, 2\right)$. Let the area...

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The pressure and volume of an ideal gas are related as (Constant). The work done when the gas is taken...

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Two charged conducting spheres of radii a and b are connected to each other by a conducting wire. The ratio...

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Let the sum of the maximum and the minimum values of the function $f(x)=\frac{2 x^2-3 x+8}{2 x^2+3 x+8}$ be $\frac{m}{n}$,...

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If the solution $y=y(x)$ of the differential equation $\left(x^4+2 x^3+3 x^2+2 x+2\right) d y-\left(2 x^2+2 x+3\right) d x=0$ satisfies $y(-1)=-\frac{\pi}{4}$,...

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The output Y of following circuit for given inputs is :

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Let two straight lines drawn from the origin O intersect the line 3x+4y=12 at the points P and Q such...

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Let a rectangle ABCD of sides 2 and 4 be inscribed in another rectangle PQRS such that the vertices of...

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The vertices of a triangle are A(-1,3),B(-2,2) and C(3,-1). A new triangle is formed by shifting the sides of the...

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A LCR circuit is at resonance for a capacitor C, inductance L and resistance R. Now the value of resistance...

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A capacitor is made of a flat plate of area A and a second plate having a stair-like structure as...

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A solid sphere and a hollow cylinder roll up without slipping on same inclined plane with same initial speed v...

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Three urns A, B and C contain 7 red, 5 black; 5 red, 7 black and 6 red, 6 black...

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Let d be the distance of the point of intersection of the lines x+63=y2=z+11 and x-74=y-93=z-42 from the point (7,8,9)....

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Two planets A and B having masses m1 and m2 move around the sun in circular orbits of $r_1$ and...

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A sphere of relative density σ and diameter D has concentric cavity of diameter d. The ratio of D/d, if...

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Let $f: \mathrm{R} \rightarrow \mathrm{R}$ be a function given by $$ f(x)=\left\{\begin{array}{cl} \frac{1-\cos 2 x}{x^2} & , x0 \end{array}\right. $$...

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A light emitting diode (LED) is fabricated using GaAs semiconducting material whose band gap is 1.42eV. The wavelength of light...

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Given below are two statements: Statement (I): When an object is placed at the centre of curvature of a concave...

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Two different adiabatic paths for the same gas intersect two isothermal curves as shown in P-V diagram. The relation between...

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A light string passing over a smooth light pulley connects two blocks of masses $\mathrm{m}_1$ and $\mathrm{m}_2$ (where $\left.m_2>m_1\right)$. If...

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A plane EM wave is propagating along x direction. It has a wavelength of 4 mm. If electric field is...

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Young's modulus is determined by the equation given by $\mathrm{Y}=49000 \frac{\mathrm{~m}}{\ell} \frac{\text { dyne }}{\mathrm{cm}^2}$ where M is the mass...

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A sample contains mixture of helium and oxygen gas. The ratio of root mean square speed of helium and oxygen...

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A particle moving in a straight line covers half the distance with speed 6 m/s. The other half is covered...

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The correct truth table for the following logic circuit is :

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A clock has 75" " cm,60" " cm long second hand and minute hand respectively. In 30 minutes duration the...

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Let $\alpha=1^2+4^2+8^2+13^2+19^2+26^2+\cdots \ldots$ upto 10 terms and $\beta=\sum_{n=1}^{10} n^4$. If $4 \alpha-\beta=55 k+40$, then k is equal to

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Paramagnetic substances: A. align themselves along the directions of external magnetic field. B. attract strongly towards external magnetic field. C....

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If the function $f(x)=\left\{\begin{array}{cl}\frac{1}{|x|} & , \\ a x^2+2 b, & |x| \geq 2\end{array}\right.$ is differentiable on R , then...

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Let $f: \mathbb{R} \rightarrow \mathbb{R}$ be a function defined by $$ \begin{aligned} & f(x)=\frac{4^x}{4^x+2} \text { and } \\ &...

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Given below are two statements : Statement I : In an LCR series circuit, current is maximum at resonance. Statement...

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Binding energy of a certain nucleus is $18 \times 10^8$ J. How much is the difference between total mass of...

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Let $\alpha, \beta \in N$ be roots of equation $x^2-70 x+\lambda=0$, where $\frac{\lambda}{2}, \frac{\lambda}{3} \notin \mathrm{~N}$. If $\lambda$ assumes the...

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

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Let $A=\{1,2,3, \ldots 20\}$. Let $R_1$ and $R_2$ two relation on A such that $\mathrm{R}_1=\{(\mathrm{a}, \mathrm{b}): \mathrm{b}$ is divisible by...

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Let A={1,2,3,4} and R={(1,2),(2,3),(1,4)} be a relation on A. Let S be the equivalence relation on A such that R⊂S...

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Two forces $\vec{F}_1$ and $\vec{F}_2$ are acting on a body. One force has magnitude thrice that of the other force...

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In the given circuit, the terminal potential difference of the cell is :

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Let $\vec{a}$ and $\vec{b}$ be two vectors such that $|\vec{a}|=1,|\vec{b}|=4$ and $\vec{a} \cdot \vec{b}=2$. If $\vec{c}=(2 \vec{a} \times \vec{b})-3 \vec{b}$...

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Let the line of the shortest distance between the lines $\mathrm{L}_1: \vec{r}=(\hat{\imath}+2 \hat{\jmath}+3 \hat{k})+\lambda(\hat{\imath}-\hat{\jmath}+\hat{k})$ and $...

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Let $y=y(x)$ be the solution of the differential equation $\left(1-x^2\right) d y=\left[x y+\left(x^3+2\right) \sqrt{3\left(1-x^2\right)}\right] d x,-1< x

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The specific heat at constant pressure of a real gas obeying $\mathrm{PV}^2=\mathrm{RT}$ equation is :

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An elastic spring under tension of 3 N has a length a . Its length is b under tension 2...

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If $\int_{-\pi / 2}^{\pi / 2} \frac{8 \sqrt{2} \cos x d x}{\left(1+e^{\sin x}\right)\left(1+\sin ^4 x\right)}=\alpha \pi+\beta \log _e(3+2 \sqrt{2})$, where...

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Let the foci and length of the latus rectum of an ellipse $\frac{x^2}{a^2}+\frac{y^2}{b^2}=1, a>b$ be $( \pm 5,0)$ and $\sqrt{50}$,...

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A proton, an electron and an alpha particle have the same energies. Their de-Broglie wavelengths will be compared as:

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The value of unknown resistance (x) for which the potential difference between B and D will be zero in the...

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Let $\mathrm{P}=\{\mathrm{z} \in \mathbb{C}:|\mathrm{z}+2-3 \mathrm{i}| \leq 1\}$ and $\mathrm{Q}=\{\mathrm{z} \in \mathbb{C}: \mathrm{z}(1+\mathrm{i})+\overline{\mathrm{z}}(1-\mathrm{i}) \leq-8\}$. Let in $\mathrm{P} \cap \mathrm{Q},|\mathrm{z}-3+2 \mathrm{i}|$ be...

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A mixture of one mole of monoatomic gas and one mole of a diatomic gas (rigid) are kept at room...

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If $\alpha$ denotes the number of solutions of $|1-\mathrm{i}|^{\mathrm{x}}=2^{\mathrm{x}}$ and $\beta=\left(\frac{|z|}{\arg (z)}\right)$, where $\mathrm{z}=\frac{\pi}{4}(1+\mathrm{i})^4\left(\frac{1-\sqrt{\pi} \mathrm{i}}{\sqrt{\pi}+\mathrm{i}}+\right. \left.\frac{\sqrt{\pi}-\mathrm{i}}{1+\sqrt{\pi} \mathrm{i}}\right), \mathrm{i}=\sqrt{-1}$, then the...

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$\sigma$ is the uniform surface charge density of a thin spherical shell of radius R. The electric field at any...

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The value 9∫_0^9 [√(10x/(x+1))]dx, where [t] denotes the greatest integer less than or equal to t, is

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Three capacitors of capacitances 25μF,30μF and 45μF are connected in parallel to a supply of 100 V. Energy stored in...

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Two wavelengths $\lambda_1$ and $\lambda_2$ are used in Young's double slit experiment $\lambda_1=450 \mathrm{~nm}$ and $\lambda_2=650 \mathrm{~nm}$. The minimum order...

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While measuring diameter of wire using screw gauge the following readings were noted. Main scale reading is 1" " mm...

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Let the line $\mathrm{L}: \sqrt{2} \mathrm{x}+\mathrm{y}=\alpha$ pass through the point of the intersection P (in the first quadrant) of the...

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A proton and an electron are associated with same de-Broglie wavelength. The ratio of their kinetic energies is: (Assume $...

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In the experiment to determine the galvanometer resistance by half-deflection method, the plot of 1/θ vs the resistance (R) of...

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A soap bubble is blown to a diameter of 7 cm . 36960erg of work is done in blowing it...

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In the expansion of $(1+x)\left(1-x^2\right)\left(1+\frac{3}{x}+\frac{3}{x^2}+\frac{1}{x^3}\right)^5, x \neq 0$, the sum of the coefficient of $x^3$ and $x^{-13}$ is equal to

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Which of the following phenomena does not explain by wave nature of light. (A) reflection (B) diffraction (C) photoelectric effect...

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Twelve wires each having resistance $2 \Omega$ are joined to form a cube. A battery of 6 V emf is...

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An ac source is connected in given series LCR circuit. The rms potential difference across the capacitor of 20μF is...

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Let $\{x\}$ denote the fractional part of $x$ and $f(x)=\frac{\cos ^{-1}\left(1-\{x\}^2\right) \sin ^{-1}(1-\{x\})}{\{x\}-\{x\}^3}, x \neq 0$. If $L$ and R...

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Average force exerted on a non-reflecting surface at normal incidence is $2.4 \times 10^{-4} \mathrm{~N}$. If $360 \mathrm{~W} / \mathrm{cm}^2$...

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A alternating current at any instant is given by $\mathrm{i}=\left[6+\sqrt{56} \sin \left(100 \pi \mathrm{t}+\frac{\pi}{3}\right)\right] \mathrm{A}$. The rms value of the...

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If three helium nuclei combine to form a carbon nucleus then the energy released in this reaction is ............ ×...

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Let $Q$ and $R$ be the feet of perpendiculars from the point $P(a, a, a)$ on the lines $x=y, z=1$...

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If d_1 is the shortest distance between the lines x+1=2y=-12z,x=y+2=6z-6 and d_2 is the shortest distance between the lines (x-1)/2=(y+8)/(-7)=(z-4)/5,(x-1)/2=(y-2)/1=(z-6)/(-3),...

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Three bodies A,B and C have equal kinetic energies and their masses are 400g,1.2kg and 1.6kg respectively. The ratio of...

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Electromagnetic waves travel in a medium with speed of $1.5 \times 10^8 \mathrm{~ms}^{-1}$ The relative permeability of the medium is...

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Let 3,7,11,15,….,403 and 2,5,8,11,…,404 be two arithmetic progressions. Then the sum, of the common terms in them, is equal to

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The total number of words (with or without meaning) that can be formed out of the letters of the word...

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A body moves on a frictionless plane starting from rest. If S_n is distance moved between t=n-1 and t =n...

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Let $S=(-1, \infty)$ and $f: S \rightarrow \mathbb{R}$ be defined as $f(x)=\int_{-1}^x\left(e^t-1\right)^{11}(2 t-1)^5(t-2)^7(t-3)^{12}(2 t-10)^{61} d t$ Let $p=$ Sum of...

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To project a body of mass m from earth's surface to infinity, the required kinetic energy is (assume, the radius...

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The density and breaking stress of a wire are 6× 〖10〗^4 " " kg/m^3 and 1.2×〖10〗^8 " " N/m^2 respectively....

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A group of 40 students appeared in an examination of 3 subjects - Mathematics, Physics & Chemistry. It was found...

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Three blocks M_1,M_2,M_3 having masses 4 kg,6 kg and 10 kg respectively are hanging from a smooth pully using rope...

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If the Coefficient of $x^{30}$ in the expansion of $\left(1+\frac{1}{x}\right)^6\left(1+x^2\right)^7\left(1-x^3\right)^8 ; x \neq 0$ is $\alpha$, then $|\alpha|$ equals

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The magnetic field existing in a region is given by $\vec{B}=0.2(1+2 x) \hat{k} T$. A square loop of edge 50...

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If the integral $525 \int_0^{\frac{\pi}{2}} \sin 2 x \cos ^{\frac{11}{2}} x\left(1+\cos ^{\frac{5}{2}} x\right)^{\frac{1}{2}} d x$ is equal to $(n \sqrt{2}-64)$,...

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The ratio of the shortest wavelength of Balmer series to the shortest wavelength of Lyman series for hydrogen atom is...

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A particle is moving in one dimension (along x axis) under the action of a variable force. It's initial position...

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A bullet of mass 50 g is fired with a speed 100m/s on a plywood and emerges with 40 m/s....

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The electric field between the two parallel plates of a capacitor of 1.5μF capacitance drops to one third of its...

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Let $\mathrm{f}:\left[-\frac{\pi}{2}, \frac{\pi}{2}\right] \rightarrow \mathrm{R}$ be a differentiable function such that $f(0)=\frac{1}{2}$, If the $...

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The current in a conductor is expressed as $I=3 t^2+4 t^3$, where I is in Ampere and t is in...

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Let $S$ be the set of positive integral values of a for which $\frac{\mathrm{ax}^2+2(\mathrm{a}+1) \mathrm{x}+9 \mathrm{a}+4}{\mathrm{x}^2-8 \mathrm{x}+32}

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A 2 A current carrying straight metal wire of resistance 1Ω, resistivity 2×〖10〗^(-6) Ωm, area of cross-section 10〖" " mm〗^2...

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To find the spring constant (k) of a spring experimentally, a student commits 2% positive error in the measurement of...

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A plane is in level flight at constant speed and each of its two wings has an area of $...

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If $2 \sin ^3 x+\sin 2 x \cos x+4 \sin x-4=0$ has exactly 3 solutions in the interval $...

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The number of elements in the set S={(x,y,z):x,y,z∈Z,x+2y+3z=42,x,y,z ≥0} equals

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In Young's double slit experiment, carried out with light of wavelength 5000Å , the distance between the slits is 0.3...

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Three rotten apples are accidently mixed with fifteen good apples. Assuming the random variable x to be the number of...

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A tuning fork resonates with a sonometer wire of length 1" " m stretched with a tension of 6N. When...

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An alternating voltage of amplitude 40 V and frequency 4kHz is applied directly across the capacitor of 12μF. The maximum...

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$f(x)=\left|\begin{array}{ccc}3 x^2+2 & 2 x & x^3+6 \\ x^3-x & 4 & x^2-2\end{array}\right|$ for all $x \in \mathbb{R}$, then $...

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If $x=x(t)$ is the solution of the differential equation $(t+1) d x=\left(2 x+(t+1)^4\right) d t, x(0)=2$, then, $x(1)$ equals

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The identical spheres each of mass 2M are placed at the corners of a right angled triangle with mutually perpendicular...

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In the given figure R_1=10Ω,R_2=8Ω,R_3=4Ω and R_4=8Ω. Battery is ideal with emf 12" " V. Equivalent resistant of the circuit...

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A hydrogen atom changes its state from $n=3$ to $\mathrm{n}=2$. Due to recoil, the percentage change in the wave length...

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A line with direction ratios 2,1,2 meets the lines x=y+2=z and x+2=2y=2z respectively at the point P and Q. if...

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If the shortest distance between the lines $\frac{x-\lambda}{-2}=\frac{y-2}{1}=\frac{z-1}{1}$ and $\frac{x-\sqrt{3}}{1}=\frac{y-1}{-2}=\frac{z-2}{1}$ is 1 , then the sum of all possible values...

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The radius of a nucleus of mass number 64 is 4.8 fermi. Then the mass number of another nucleus having...

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The heat absorbed by a system in going through the given cyclic process is :

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If $...

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If $\frac{{ }^{11} \mathrm{C}_1}{2}+\frac{{ }^{11} \mathrm{C}_2}{3}+\cdots \cdot+\frac{{ }^{11} \mathrm{C}_9}{10}=\frac{\mathrm{n}}{\mathrm{m}}$ with $\operatorname{gcd}(\mathrm{n}, \mathrm{m})=1$, then n+m is equal to

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Let $g(x)$ be a linear function and $f(x)=\left\{\begin{array}{ll}g(x) & , x \leq 0 \\ \left(\frac{1+x}{2+x}\right)^{\frac{1}{x}} & , x>0\end{array}\right.$, is continuous...

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If $5 f(x)+4 f\left(\frac{1}{x}\right)=x^2-2, \forall x \neq 0$ and $y=9 x^2 f(x)$, then y is strictly increasing in :

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An infinite plane sheet of charge having uniform surface charge density $+\sigma_3 \mathrm{C} / \mathrm{m}^2$ is placed on $\mathrm{x}-\mathrm{y}$ plane....

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Time periods of oscillation of the same simple pendulum measured using four different measuring clocks were recorded as 4.62s,4.632s,4.6s and...

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Two identical charged spheres are suspended by strings of equal lengths. The strings make an angle θ with each other....

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The area (in sq. units) of the part of circle $x^2+y^2=169$ which is below the line 5x-y=13 is $...

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The distance between object and its 3 times magnified virtual image as produced by a convex lens is 20" "...

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A body of mass 50kg is lifted to a height of 20m from the ground in the two different ways...

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If the mean and variance of the data 65,68,58,44, 48, 45, 60, α,β,60 where α>β are 56 and 66.2 respectively,...

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Two marbles are drawn in succession from a box containing 10 red, 30 white, 20 blue and 15 orange marbles,...

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A rectangular loop of sides 12cm and 5cm, with its sides parallel to the x-axis and y-axis respectively moves with...

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Let $C: x^2+y^2=4$ and $C^{\prime}: x^2+y^2-4 \lambda x+9=0$ be two circles. If the set of all values of $\lambda$ so...

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Let M denote the median of the following frequency distribution. Then 20 M is equal to :

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A simple pendulum doing small oscillations at a place R height above earth surface has time period of T_1=4" "...

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If the solution curve y=y(x) of the differential equation $\left(1+y^2\right)\left(1+\log _e x\right) d x+x d y=0, x>0$ passes through the...

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In an ac circuit, the instantaneous current is zero, when the instantaneous voltage is maximum. In this case, the source...

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For $\alpha, \beta, \gamma \neq 0$. If $\sin ^{-1} \alpha+\sin ^{-1} \beta+\sin ^{-1} \gamma=\pi$ and $(\alpha+\beta+\gamma)(\alpha-\gamma+\beta)=3 \alpha \beta$, then $\gamma$...

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A wooden block of mass 5 kg rests on soft horizontal floor. When an iron cylinder of mass 25 kg...

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If the points of intersection of two distinct conics $x^2+y^2=4 b$ and $\frac{x^2}{16}+\frac{y^2}{b^2}=1$ lie on the curve $y^2=3 x^2$, then...

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The co-ordinates of a particle moving in $x-y$ plane are given by: $x=2+4 t, y=3 t+8 t^2$. The motion of...

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A regular polygon of 6 sides is formed by bending a wire of length 4π meter. If an electric current...

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Match list-I with list-II: (Where a = radius of planet orbit, r = radius of planet, M = mass of...

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The distance of the point $Q(0,2,-2)$ form the line passing through the point $P(5,-4,3)$ and perpendicular to the lines $...

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P-T diagram of an ideal gas having three different densities $\rho_1, \rho_2, \rho_3$ (in three different cases) is shown in...

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Let $\frac{x^2}{a^2}+\frac{y^2}{b^2}=1, a>b$ be an ellipse, whose eccentricity is $\frac{1}{\sqrt{2}}$ and the length of the latus rectum is $\sqrt{14}$. Then...

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Two conducting circular loops A and B are placed in the same plane with their centres coinciding as shown in...

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A monochromatic light of wavelength 6000Å is incident on the single slit of width 0.01mm. If the diffraction pattern is...

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The value of net resistance of the network as shown in the given figure is :

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The minimum energy required by a hydrogen atom in ground state to emit radiation in Balmer series is nearly :

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Let α,β be the roots of the equation$x^2-x+2=0$ with Im⁡(α)>Im⁡(β). Then $\alpha^6+\alpha^4+\beta^4-5 \alpha^2$ is equal to

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Ratio of radius of gyration of a hollow sphere to that of a solid cylinder of equal mass, for moment...

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The sum of the series $\frac{1}{1-3 \cdot 1^2+1^4}+\frac{2}{1-3 \cdot 2^2+2^4}+\frac{3}{1-3 \cdot 3^2+3^4}+\cdots$. up to 10 terms is

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Let f:R→R be defined as $f(x)=\left\{\begin{array}{ccc}\frac{a-b \cos 2 x}{x^2} & ; & x1\end{array}\right.$ If f is continuous everywhere in R...

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Consider a block and trolley system as shown in figure. If the coefficient of kinetic friction between the trolley and...

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All the letters of the word "GTWENTY" are written in all possible ways with or without meaning and these words...

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Consider the system of linear equation x+y+z= 4μ,x+2y+2λz=10μ,x+3y+4λ^2 z=μ^2+15, where λ,μ∈R. Which one of the following statements is NOT correct?

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If the collision frequency of hydrogen molecules in a closed chamber at 〖27〗^∘ C is Z, then the collision frequency...

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An infinitely long positively charged straight thread has a linear charge density $\lambda \mathrm{Cm}^{-1}$. An electron revolves along a circular...

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Let $\vec{a}=3 \hat{\imath}+\hat{\jmath}-2 \hat{k}, \vec{b}=4 \hat{\imath}+\hat{\jmath}+7 \hat{k}$ and $\overrightarrow{\mathrm{c}}=\hat{\imath}-3 \hat{\jmath}+4 \hat{k}$ be three vectors. If a vectors $\overrightarrow{\mathrm{p}}$ satisfies $...

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Equation of two diameters of a circle are 2x-3y=5 and 3x-4y=7. The line joining the points $\left(-\frac{22}{7},-4\right)$ and $\left(-\frac{1}{7}, 3\right)$...

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To measure the internal resistance of a battery, potentiometer is used. For $\mathrm{R}=10 \Omega$, the balance point is observed at...

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An electron rotates in a circle around a nucleus having positive charge Ze. Correct relation between total energy (E) of...

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If the domain of the function f(x)=cos^(-1)⁡((2-|x|)/4)+(log_e⁡(3-x))^(-1) is [-α,β)-{y}, then α+β+γ is equal to :

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For $0

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A particle moving in a circle of radius R with uniform speed takes time T to complete one revolution. If...

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Let A be a square matrix such that $A A^T=I$. Then $\frac{1}{2} A\left[\left(A+A^T\right)^2+\left(A-A^T\right)^2\right]$ is equal to

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Let $y=y(x)$ be the solution of the differential equation $...

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A body travels 102.5 m in $\mathrm{n}^{\text {th }}$ second and 115.0 m in $(\mathrm{n}+2)^{\text {th }}$ second. The acceleration...

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If the system of equations 2x+3y-z=5 x+αy+3z=-4 3x-y+βz=7 has infinitely many solutions, then 13αβ is equal to

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In hydrogen like system the ratio of coulombian force and gravitational force between an electron and a proton is in...

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Suppose $f(x)=\frac{\left(2^x+2^{-x}\right) \tan x \sqrt{\tan ^{-1}\left(x^2-x+1\right)}}{\left(7 x^2+3 x+1\right)^3}$ Then the value of f^' (0) is equal to

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A simple pendulum of length 1" " m has a wooden bob of mass 1" " kg. It is struck...

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Let f:R→R and g:R→R be defined as $$f(x)=\left\{\begin{array}{lll} \log _e x & , & x>0 \\ e^{-x} & , &...

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The equation of stationary wave is : Which of the following is NOT correct

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The angle between vector Q ⃗ and the resultant of (2Q ⃗+2P ⃗) and (2Q ⃗-2P ⃗) is:

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If the value of the integral $\int_{-\frac{\pi}{2}}^{\frac{\pi}{2}}\left(\frac{x^2 \cos x}{1+\pi^x}+\frac{1+\sin ^2 x}{1+e^{\sin x^{2023}}}\right) d x=\frac{\pi}{4}(\pi+a)-2$ then the value of a is

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Let $\alpha, \beta, \gamma, \delta \in \mathrm{Z}$ and let $\mathrm{A}(\alpha, \beta), \mathrm{B}(1,0), \mathrm{C}(\gamma, \delta)$ and $D(1,2)$ be the vertices of...

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Two integers x and y are chosen with replacement from the set {0,1,2,3, 10}. Then the probability that |x-y|>5 is

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The dimensional formula of angular impulse is :

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If a rubber ball falls from a height h and rebounds upto the height of h/2. The percentage loss of...

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The area enclosed by the curves xy+4y=16 and x+y=6 is equal to :

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Given below are two statements: Statement-I: Figure shows the variation of stopping potential with frequency (v) for the two photosensitive...

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Let R be a relation on Z×Z defined by (a,b)R(c,d) if and only if ad-bc is divisible by 5 ....

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A wooden block, initially at rest on the ground, is pushed by a force which increases linearly with time t....

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The radius (r), length (l) and resistance (R) of a metal wire was measured in the laboratory as r=(0.35±0.05)cm R=(100±10)...

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Let S={x∈R:(√3+√2 )^x+(√3-√2 )^x=10}. Then the number of elements in S is :

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Let PQR be a triangle with R(-1,4,2). Suppose M(2,1,2) is the mid point of PQ. The distance of the centroid...

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The solution curve of the differential equation $y \frac{d x}{d y}=x\left(\log _e x-\log _e y+1\right), x>0, y>0$ passing through the...

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Let (α,β,γ) be the foot of perpendicular from the point (1,2,3) on the line (x+3)/5=(y-1)/2=(z+4)/3. then 19(α+β+γ) is equal to...

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Given below are two statements : Statement-I: When a capillary tube is dipped into a liquid, the liquid neither rises...

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Which figure shows the correct variation of applied potential difference $(V)$ with photoelectric current $(I)$ at two different intensities of...

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In series LCR circuit, the capacitance is changed from C to 4C. To keep the resonance frequency unchanged, the new...

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Let $A=\left[\begin{array}{lll}1 & 0 & 0 \\ 0 & \alpha & \beta \\ 0 & \beta & \alpha\end{array}\right]$ and $...

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Let y=y(x) be the solution of the differential equation sec⁡xdy+{2(1-x)tan⁡x+x(2-x)} dx=0 such that y(0)=2. Then y(2) is equal to :

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If G be the gravitational constant and u be the energy density then which of the following quantity have the...

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Consider the function $\mathrm{f}:\left[\frac{1}{2}, 1\right] \rightarrow \mathrm{R}$ defined by $f(x)=4 \sqrt{2} x^3-3 \sqrt{2} x-1$. Consider the statements (I) The curve...

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An effective power of a combination of 5 identical convex lenses which are kept in contact along the principal axis...

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10 divisions on the main scale of a Vernier calliper coincide with 11 divisions on the Vernier scale. If each...

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Following gates section is connected in a complete suitable circuit. For which of the following combination, bulb will glow (ON):

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On celcius scale the temperature of body increases by 40ºC. The increase in temperature on Fahrenheit scale is:

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Let $g: R \rightarrow R$ be a non constant twice differentiable such that $g^{\prime}\left(\frac{1}{2}\right)=g^{\prime}\left(\frac{3}{2}\right)$. If a real valued function $f$...

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Let O be the origin and the position vector of A and B be $2 \hat{\imath}+2 \hat{\jmath}+\hat{k}$ and $...

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Light emerges out of a convex lens when a source of light kept at its focus. The shape of wavefront...

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A metal wire of uniform mass density having length L and mass M is bent to form a semicircular arc...

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The area (in square units) of the region bounded by the parabola $y^2=4(x-2)$ and the line $y=2 x-8$

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The de Broglie wavelengths of a proton and an α particle are λ and 2λ respectively. The ratio of the...

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The resistances of the platinum wire of a platinum resistance thermometer at the ice point and steam point are 8...

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If n is the number of ways five different employees can sit into four indistinguishable offices where any office may...

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A function y=f(x) satisfies $f(x) \sin 2 x+\sin x-\left(1+\cos ^2 x\right) f^{\prime}(x)=0$ with condition $f(0)=0$. Then $f\left(\frac{\pi}{2}\right)$ is equal to

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The value of $\lim _{n \rightarrow \infty} \sum_{k=1}^n \frac{n^3}{\left(n^2+k^2\right)\left(n^2+3 k^2\right)}$ is:

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If the system of linear equations $$ \begin{aligned} & x-2 y+z=-4 \\ & 2 x+\alpha y+3 z=5 \\ & 3...

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A galvanometer has a resistance of 50Ω and it allows maximum current of 5mA. It can be converted into voltmeter...

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Given below are two statements : Statement I : When speed of liquid is zero everywhere, pressure difference at any...

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If $\tan \mathrm{A}=\frac{1}{\sqrt{x\left(x^2+x+1\right)}}, \tan B=\frac{\sqrt{x}}{\sqrt{x^2+x+1}}$ and $\tan C=\left(x^{-3}+x^{-2}+x^{-1}\right)^{\frac{1}{2}}, 0

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If $\alpha,-\frac{\pi}{2}

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In an experiment to measure focal length (f) of convex lens, the least counts of the measuring scales for the...

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For $\mathrm{x} \in\left(-\frac{\pi}{2}, \frac{\pi}{2}\right)$, if $y(x)=\int \frac{\operatorname{cosec} x+\sin x}{\operatorname{cosec} x \sec x+\tan x \sin ^2 x} d x$ and $...

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$\lim _{x \rightarrow 0} \frac{\mathrm{e}^{2|\sin x|}-2|\sin x|-1}{x^2}$

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If $\mathrm{A}=\left[\begin{array}{cc}\sqrt{2} & 1 \\ -1 & \sqrt{2}\end{array}\right], \mathrm{B}=\left[\begin{array}{ll}1 & 0 \\ 1 & 1\end{array}\right], \mathrm{C}=\mathrm{ABA}^{\mathrm{T}}$ and $\mathrm{X}=\mathrm{A}^{\mathrm{T}} \mathrm{C}^2 \mathrm{~A}$,...

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The maximum area of a triangle whose one vertex is at $(0,0)$ and the other two vertices lie on the...

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Which of the following nuclear fragments corresponding to nuclear fission between neutron $\left(\begin{array}{l}1 \\ 0\end{array} \mathrm{n}\right)$ and uranium isotope $...

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Let $\left(5, \frac{a}{4}\right)$, be the circumcenter of a triangle with vertices $A(a,-2), B(a, 6)$ and $C\left(\frac{a}{4},-2\right)$. Let $\alpha$ denote the...

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If $f(x)=\frac{4 x+3}{6 x-4}, x \neq \frac{2}{3}$ and (fof) $(x)=g(x)$, where $\mathrm{g}: \mathbb{R}-\left\{\frac{2}{3}\right\} \rightarrow \mathbb{R}-\left\{\frac{2}{3}\right\}$, then (gogog) (4) is equal...

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The value of the integral $\int_0^{\frac{\pi}{4}} \frac{x d x}{\sin ^4(2 x)+\cos ^4(2 x)}$ equals :

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A parallel plate capacitor has a capacitance C=200pF. It is connected to 230" " V ac supply with an angular...

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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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The area of the region $\left\{(x, y): y^2 \leq 4 x, x0, x \neq 3\right\}$ is

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The electric field in an electromagnetic wave is given by $\overrightarrow{\mathrm{E}}=\hat{\mathrm{i}} 40 \cos \omega\left(\mathrm{t}-\frac{\mathrm{z}}{\mathrm{c}}\right) \mathrm{NC}^{-1}$. The magnetic field induction of...

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Let $\vec{a}=a_i \hat{\imath}+a_2 \hat{\jmath}+a_3 \hat{k}$ and $\vec{b}=b_1 \hat{\imath}+b_2 \hat{\jmath}+b_3 \hat{k}$ be two vectors such that $|\vec{a}|=1 ; \vec{a} \cdot \vec{b}=2$...

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A ball of mass 0.5kg is attached to a string of length 50cm. The ball is rotated on a horizontal...

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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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If one of the diameters of the circle $x^2+y^2-10 x+4 y+13=0$ is a chord of another circle $C$, whose center...

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Two moles a monoatomic gas is mixed with six moles of a diatomic gas. The molar specific heat of the...

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An electron is projected with uniform velocity along the axis inside a current carrying long solenoid. Then :

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In a △ABC, suppose y=x is the equation of the bisector of the angle B and the equation of the...

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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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If the foci of a hyperbola are same as that of the ellipse $\frac{x^2}{9}+\frac{y^2}{25}=1$ and the eccentricity of the hyperbola...

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Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is

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$\lim _{x \rightarrow \frac{\pi}{2}}\left(\frac{1}{\left(x-\frac{\pi}{2}\right)^2} \int_{x^3}^{\left(\frac{\pi}{2}\right)^3} \cos \left(\frac{1}{t^3}\right) d t\right)$ is equal to

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Two identical capacitors have same capacitance C. One of them is charged to the potential V and other to the...

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A bag contains 8 balls, whose colours are either white or black. 4 balls are drawn at random without replacement...

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If z=x+iy,xy≠0, satisfies the equation z^2+iz ‾=0, then |z^2 | is equal to :

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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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If $\mathrm{z}=\frac{1}{2}-2 \mathrm{i}$, is such that $|\mathrm{z}+1|=\alpha \mathrm{z}+\beta(1+\mathrm{i}), \mathrm{i}=\sqrt{-1}$ and $\alpha, \beta \in \mathrm{R}$, then $\alpha+\beta$ is equal to

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Let $a$ be the sum of all coefficients in the expansion of $\left(1-2 x+2 x^2\right)^{2023}\left(3-4 x^2+2 x^3\right)^{2024}$ and $...

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A ceiling fan having 3 blades of length 80 cm each is rotating with an angular velocity of 1200rpm. The...

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The reading in the ideal voltmeter (V) shown in the given circuit diagram is

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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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In the given circuit if the power rating of Zener diode is 10" " mW, the value of series resistance...

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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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let $S_a$ denote the sum of first n terms an arithmetic progression. If S_20=790 and S_10=145, then S_15- S_5 is...

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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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In a closed organ pipe, the frequency of fundamental note is 30Hz. A certain amount of water is now poured...

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Number of optical isomers possible for 2 – chlorobutan

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For 0

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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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If R is the radius of the earth and the acceleration due to gravity on the surface of earth is...

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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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Consider a Disc of mass 5 kg, radius 2 m, rotating with angular velocity of 10rad/s about an axis perpendicular...

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How many compounds among the following compounds show inductive, mesomeric as well as hyperconjugation effects?

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A line passing through the point  makes an angle of  with the positive direction of -axis. If this line is...

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A capacitor of capacitance C and potential V has energy E. It is connected to another capacitor of capacitance 2C...

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In an A.P., the sixth terms a_6=2. If the a_1 a_4 a_5 is the greatest, then the common difference of...

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The displacement and the increase in the velocity of a moving particle in the time interval of t to (t+1)s...

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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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With rise in temperature, the Young's modulus of elasticity

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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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If in a G.P. of 64 terms, the sum of all the terms is 7 times the sum of the...

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The distance between object and its two times magnified real image as produced by a convex lens is 45cm. The...

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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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Each of three blocks P,Q and R shown in figure has a mass of 3kg. Each of the wire A...

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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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A electron of hydrogen atom on an excited state is having energy $E_n$ =-0.85eV. The maximum number of allowed transitions...

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On reaction of Lead Sulphide with dilute nitric acid which of the following is not formed ?

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Two cells are connected in opposition as shown. Cell $E_1$ is of 8V emf and 2Ω internal resistance; the cell...

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The horizontal component of earth's magnetic field at a place is $3.5 \times 10^{-5} T$. A very long straight conductor...

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Identify the product A and product B in the following set of reactions.

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A series L,R circuit connected with an ac source E=(25sin⁡1000t)V has a power factor of 1/√2. If the source of...

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At which temperature the r.m.s. velocity of a hydrogen molecule equal to that of an oxygen molecule at $47^{\circ}$ C...

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Identify major product " X " formed in the following reaction :

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A particle of mass m projected with a velocity ' u ' making an angle of $30^{\circ}$ with the horizontal....

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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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A spherical body of mass 100" " g is dropped from a height of 10" " m from the ground....

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The electrostatic potential due to an electric dipole at a distance ' r ' varies as :

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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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Two thermodynamical process are shown in the figure. The molar heat capacity for process A and B are $C_A$ and...

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A Zener diode of breakdown voltage 10V is used as a voltage regulator as shown in the figure. The current...

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An electric toaster has resistance of 60Ω at room temperature $\left(27^{\circ} \mathrm{C}\right)$. The toaster is connected to a 220 V...

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The gravitational potential at a point above the surface of earth is $-5.12 \times 10^7 \mathrm{~J} / \mathrm{kg}$ and the...

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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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Primary coil of a transformer is connected to 220V ac. Primary and secondary turns of the transforms are 100 and...

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

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The diffraction pattern of a light of wavelength 400 nm diffracting from a slit of width 0.2 mm is focused...

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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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If the wavelength of the first member of Lyman series of hydrogen is λ. The wavelength of the second member...

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In Kjeldahl's method for estimation of nitrogen, CuSO_4 acts as :

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Two insulated circular loop A and B radius ' a ' carrying a current of 'I' in the anti clockwise...

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A rigid wire consists of a semicircular portion of radius R and two straight sections. The wire is partially immerged...

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What is the structure of C ?

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The refractive index of a prism with apex angle A is cot⁡A/2. The angle of minimum deviation is :

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The electric field of an electromagnetic wave in free space is represented as $\vec{E}=E_0 \cos (\omega t-k z) \hat{\imath}$. The...

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The relation between time ' t ' and distance ' x ' is t= αx^2+βx, where α and β are...

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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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The ratio of the magnitude of the kinetic energy to the potential energy of an electron in the $...

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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 work function of a substance is 3.0eV. The longest wavelength of light that can cause the emission of photoelectrons...

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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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Young's modules of material of a wire of length 'L' and cross-sectional area is . If the length of the...

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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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A potential divider circuit is shown in figure. The output voltage $\mathrm{V}_0$ is

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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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All surfaces shown in figure are assumed to be frictionless and the pulleys and the string are light. The acceleration...

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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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Match List-I with List-II.

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

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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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The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals A. have...

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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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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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In a test experiment on a model aeroplane in wind tunnel, the flow speeds on the upper and lower surfaces...

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An electron is moving under the influence of the electric field of a uniformly charged infinite plane sheet s having...

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When the displacement of a simple harmonic oscillator is one third of its amplitude, the ratio of total energy to...

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A $16 \Omega$ wire is bend to form a square loop. A 9 V battery with internal resistance $1 \Omega$...

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In a double slit experiment shown in figure, when light of wavelength 400 nm is used, dark fringe is observed...

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The magnetic potential due to a magnetic dipole at a point on its axis situated at a distance of 20...

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A cylinder is rolling down on an inclined plane of inclination $60^{\circ}$. It's acceleration during rolling down will be $...

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A square loop of side 10 cm and resistance $0.7 \Omega$ is placed vertically in east-west plane. A uniform magnetic...

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A ball rolls off the top of a stairway with horizontal velocity $u$. The steps are 0.1 m high and...

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When a hydrogen atom going from $n=2$ to $n=1$ emits a photon, its recoil speed is $\frac{\mathrm{x}}{5} \mathrm{~m} / \mathrm{s}$....

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Two vessels A and B are of the same size and are at same temperature. A contains 1 g of...

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The explosive in a Hydrogen bomb is a mixture of ${ }_1 \mathrm{H}^2,{ }_1 \mathrm{H}^3$ and ${ }_3 \mathrm{Li}^6$ in...

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A capacitor of capacitance 100μF is charged to a potential of 12 V and connected to a 6.4mH inductor to...

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At what distance above and below the surface of the earth a body will have same weight, (take radius of...

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A thermodynamic system is taken from an original state A to an intermediate state B by a linear process as...

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A biconvex lens of refractive index 1.5 has a focal length of 20 cm in air. Its focal length when...

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The deflection in moving coil galvanometer falls from 25 divisions to 5 division when a shunt of 24Ω is applied....

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The de-Broglie wavelength of an electron is the same as that of a photon. If velocity of electron is 25%...

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A galvanometer having coil resistance 10Ω shows a full scale deflection for a current of 3 mA. For it to...

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If the radius of curvature of the path of two particles of same mass are in the ratio 3:4, then...

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Match List I with List II Chose the correct answer from the options given below

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A block of mass 100 kg slides over a distance of 10 m on a horizontal surface. If the co-efficient...

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The resistance $\mathrm{R}=\frac{\mathrm{V}}{\mathrm{I}}$ where $\mathrm{V}=(200 \pm 5) \mathrm{V}$ and $\mathrm{I}=(20 \pm 0.2) \mathrm{A}$, the percentage error in the measurement of...

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The potential energy function (in J ) of a particle in a region of space is given as $...

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A body starts moving from rest with constant acceleration covers displacement $S_1$ in first (p-1) seconds and $S_2$ in first...

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Two charges of 5Q and -2Q are situated at the points (3a,0) and (-5a,0) respectively. The electric flux through a...

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A convex mirror of radius of curvature 30 cm forms an image that is half the size of the object....

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Given below are two statements: Statement I : If a capillary tube is immersed first in cold water and then...

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The electric current through a wire varies with time as $I=I_0+\beta \mathrm{t}$. where $I_0=20 \mathrm{~A}$ and $\beta=3 \mathrm{~A} / \mathrm{s}$....

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In the given circuit, the breakdown voltage of the Zener diode is 3.0 V. What is the value of $I_z$...

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If $\alpha$ satisfies the equation $x^2+x+1=0$ and $(1+\alpha)^7=\mathrm{A}+\mathrm{B} \alpha+\mathrm{C} \alpha^2, \mathrm{~A}, \mathrm{~B}, \mathrm{C} \geq 0$, then $5(3 \mathrm{~A}-2 \mathrm{~B}-\mathrm{C})$ is...

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Let $...

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Let $f(x)=x^3+x^2 f^{\prime}(1)+x f^{\prime \prime}(2)+f^{\prime \prime}(3), x \in R$. Then $f^{\prime}(10)$ is equal to

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Let the set of all $a \in R$ such that the equation $\cos 2 x+a \sin x=2 a-7$ has a...

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A fair die is tossed repeatedly until a six is obtained. Let $X$ denote the number of tosses required and...

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If $8=3+\frac{1}{4}(3+p)+\frac{1}{4^2}(3+2 p)+\frac{1}{4^3}(3+3 p)+\cdots \infty$, then the value of $p$ is

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Let the area of the region $...

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If the solution of the differential equation $(2 x+3 y-2) d x+(4 x+6 y-7) d y=0, y(0)=3$, is $...

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Let for a differentiable function $f:(0, \infty) \rightarrow R$, $f(x)-f(y) \geq \log _{\varepsilon}\left(\frac{x}{y}\right)+x-y, \forall x, y \in(0, \infty).$ Then $...

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The least positive integral value of $\alpha$, for which the angle between the vectors $\alpha \hat{\imath}-2 \hat{\jmath}+2 k$ and $...

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The function $\mathrm{f}: \mathrm{N}-\{1\} \rightarrow \mathrm{N}$; defined by $\mathrm{f}(\mathrm{n})=$ the highest prime factor of $n$, is :

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Consider the matrix $...

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If $a=\lim _{x \rightarrow 0} \frac{\sqrt{1+\sqrt{1+x^4}}-\sqrt{2}}{x^4}$ and $b=\lim _{x \rightarrow 0} \frac{\sin ^2 x}{\sqrt{2}-\sqrt{1+\cos x}}$, then the value of $...

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Let $\overrightarrow{\mathrm{a}}=\hat{\imath}+2 \hat{\jmath}+\mathrm{k}, \overrightarrow{\mathrm{b}}=3(\hat{\imath}-\hat{\jmath}+\mathrm{k})$. Let $\vec{c}$ be the vector such that $\vec{a} \times \vec{c}=\vec{b}$ and $\vec{a} \cdot \vec{c}=3$. Then $...

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The portion of the line $4 x+5 y=20$ in the first quadrant is trisected by the lines $\mathrm{L}_1$ and $\mathrm{L}_2$...

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The length of the chord of the ellipse $\frac{x^2}{25}+\frac{y^2}{16}=1$, whose mid point is $\left(1, \frac{2}{5}\right)$, is equal to :

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Let $a_1, a_2, \ldots . . a_{10}$ be 10 observations such that $\sum_{\mathrm{k}=1}^{10} \mathrm{a}_{\mathrm{k}}=50$ and $\sum_{\forall \mathrm{k}

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Consider the function $f(x)=\left\{\begin{array}{cl} \frac{a\left(7 x-12-x^2\right)}{b\left|x^2-7 x+12\right|} & , x3 \\ b & , x=3 \end{array}\right.$ Where $[\mathrm{x}]$ denotes the...

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Four distinct points (2k,3k),(1,0),(0,1) and (0,0) lie on a circle for k equal to :

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If $S=\{z \in C:|z-i|=|z+i|=|z-1|\}$, then, $n(S)$ is:

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Let $S=\{1,2,3, \ldots, 10\}$. Suppose M is the set of all the subsets of S , then the relation $...

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If $\int_0^1 \frac{1}{\sqrt{3+x}+\sqrt{1+x}} d x=a+b \sqrt{2}+c \sqrt{3}$, where $\mathrm{a}, \mathrm{b}, \mathrm{c}$ are rational numbers, then $2 \mathrm{a}+3 \mathrm{~b}-4 \mathrm{c}$ is...

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If the shortest distance between the lines $\frac{x-4}{1}=\frac{y+1}{2}=\frac{z}{-3}$ and $\frac{x-\lambda}{2}=\frac{y+1}{4}=\frac{z-2}{-5}$ is $\frac{6}{\sqrt{5}}$, then the sum of all possible values of...

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If the shortest distance of the parabola $y^2=4 x$ from the centre of the circle $x^2+y^2-4 x-16 y+64=0$ is d...

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The number of common terms in the progressions 4,9,14,19,....., up to 25th term and 3,6,9,12, up to 37th term is...

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If A denotes the sum of all the coefficients in the expansion of $\left(1-3 x+10 x^2\right)^n$ and B denotes the...

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If $(a, b)$ be the orthocentre of the triangle whose vertices are $(1,2),(2,3)$ and $(3,1)$, and $...

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Let $x=x(t)$ and $y=y(t)$ be solutions of the differential equations $\frac{\mathrm{dx}}{\mathrm{dt}}+\mathrm{ax}=0$ and $\frac{\mathrm{dy}}{\mathrm{dt}}+\mathrm{by}=0$ respectively, $\mathrm{a}, \mathrm{b} \in \mathrm{R}$. Given that...

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The distance, of the point (7,-2,11) from the line $\frac{x-6}{1}=\frac{y-4}{0}=\frac{z-8}{3}$ along the line $\frac{x-5}{2}=\frac{y-1}{-3}=\frac{z-5}{6}$, is :

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${ }^{n-1} C_r=\left(k^2-8\right)^n C_{r+1}$ if and only if :

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From the given list, the number of compounds with +4 oxidation state of Sulphur $...

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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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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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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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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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The electronic configuration for Neodymium is: [Atomic Number for Neodymium 60]

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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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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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Yellow compound of lead chromate gets dissolved on treatment with hot NaOH solution. The product of lead formed is a...

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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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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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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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A solution of two miscible liquids showing negative deviation from Raoult's law will have :

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Which of the following has highly acidic hydrogen?

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Which of the following electronic configuration would be associated with the highest magnetic moment?

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Highest enol content will be shown by :

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Two nucleotides are joined together by a linkage known as :

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If average depth of an ocean is 4000 m and the bulk modulus of water is $2 \times 10^9 \mathrm{Nm}^{-2}$,...

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The charge accumulated on the capacitor connected in the following circuit is $\mu \mathrm{C} ($ Given $\mathrm{C}=150 \mu \mathrm{~F})$

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Two long, straight wires carry equal currents in opposite directions as shown in figure. The separation between the wires is...

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A particle executes simple harmonic motion with an amplitude of 4 cm . At the mean position, velocity of the...

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Four particles each of mass 1kg are placed at four corners of a square of side 2 m. Moment of...

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In a nuclear fission process, a high mass nuclide $(\mathrm{A} \approx 236)$ with binding energy $7.6 \mathrm{MeV} /$ Nucleon dissociated...

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Two immiscible liquids of refractive indices $\frac{8}{5}$ and $\frac{3}{2}$ respectively are put in a beaker as shown in the figure....

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Two coils have mutual inductance 0.002H. The current changes in the first coil according to the relation $i=i_0$ sin⁡ωt, where...

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A thin metallic wire having cross sectional area of $10^{-4}m^2$ is used to make a ring of radius 30 cm....

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A particle starts from origin at $t = 0$ with a velocity $5{\rm{\hat im}}/{\rm{s}}$ and moves in $x - y$...

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The average kinetic energy of a monatomic molecule is 0.414eV at temperature : (Use $K_B=1.38×10^{-23}J/mol-K$)

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A wire of resistance R and length L is cut into 5 equal parts. If these parts are joined parallely,...

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A wire of length 10 cm and radius $\sqrt 7 \times {10^{ - 4}}\;{\rm{m}}$ connected across the right gap of...

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Given below are two statements : Statement (I) : Planck's constant and angular momentum have same dimensions. Statement (II) :...

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A plane electromagnetic wave propagating in x -direction is described by $...

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A convex lens of focal length 40 cm forms an image of an extended source of light on a photoelectric...

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An electric charge ${10^{ - 6}}\mu {\rm{C}}$ is placed at origin (0, 0)m of X-Y co-ordinate system. Two points P...

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A rectangular loop of length 2.5 m and width 2m is placed at $60^∘$ to a magnetic field of 4T....

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The radius of third stationary orbit of electron for Bohr's atom is R. The radius of fourth stationary orbit will...

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0.08 kg air is heated at constant volume through $5^∘$ C. The specific heat of air at constant volume is...

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Two bodies of mass 4g and 25g are moving with equal kinetic energies. The ratio of magnitude of their linear...

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Identify the physical quantity that cannot be measured using spherometer :

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Which of the following circuits is reverse - biased ?

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A train is moving with a speed of 12m/s on rails which are 1.5 m apart. To negotiate a curve...

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The acceleration due to gravity on the surface of earth is g. If the diameter of earth reduces to half...

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A proton moving with a constant velocity passes through a region of space without any change in its velocity. If...

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If the refractive index of the material of a prism is $\cot \left(\frac{A}{2}\right)$, where A is the angle of prism...

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Given below are two statements : Statement (I) :Viscosity of gases is greater than that of liquids. Statement (II) :...

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Position of an ant ( S in metres) moving in Y-Z plane is given by $S=2 t^2 \hat{\jmath}+5 \hat{k}$ (where...

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