Q JEE Main 2026

The mass of iron converted into $\mathrm{Fe}_3 \mathrm{O}_4$ by the action of 18 g of steam is : (Given :...

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Q JEE MAIN 2026

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

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Q JEE MAIN 2026

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

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Q JEE MAIN_2026_

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

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Q JEE MAIN 2026

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

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Q JEE MAIN 2026

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

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Q JEE MAIN 2026

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

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Q JEE MAIN 2026

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

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Q JEE MAIN 2026

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

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Q JEE MAIN_2026_

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

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

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Q JEE MAIN 2019

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

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Q JEE MAIN 2019

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

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Q JEE MAIN 2020

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

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Q JEE-MAIN 2019

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

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Q JEE-MAIN 2019

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

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Q JEE MAIN 2019

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

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Q JEE MAIN 2019

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

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Q JEE MAIN 2019

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

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Q JEE MAIN 2020

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

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Q JEE MAIN 2019

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

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Q JEE MAIN 2020

A solution of two components containing $n_1$ moles of the $1^{\text {st }}$ component and $n_2$ moles of the $...

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Q JEE MAIN 2019

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

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Q JEE MAIN 2020

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

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Q JEE MAIN 2020

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

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Q JEE MAIN 2020

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

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Q JEE MAIN 2019

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

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Q JEE MAIN 2020

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

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Q JEE MAIN 2020

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

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Q JEE MAIN 2019

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

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Q JEE MAIN 2020

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

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Q JEE MAIN 2020

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

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Q JEE MAIN 2021

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

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Q JEE-MAIN 2021

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

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Q JEE MAIN 2020

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

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Q JEE MAIN 2021

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

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Q JEE-MAIN 2021

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

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Q JEE MAIN 2021

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

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Q JEE MAIN 2021

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

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Q JEE MAIN 2021

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

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Q JEE MAIN 2019

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

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Q JEE MAIN 2019

In the reaction of oxalate with permanganate in acidic medium, the number of electrons involved in producing one molecule of...

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Q JEE MAIN 2021

If 80 g of copper sulphate $\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}$ is dissolved in delonised water to make 5 L...

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Q JEE-MAIN 2021

If 80 g of copper sulphate $\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}$ is dissolved in deionised water to make 5 L...

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Q JEE MAIN 2021

The molarity of the solution prepared by dissolving 6.3 g of oxalic acid $\left(\mathrm{H}_2 \mathrm{C}_2 \mathrm{O}_4 .2 \mathrm{H}_2 \mathrm{O}\right)$ in...

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Q JEE MAIN 2019

100 mL of a water sample contains 0.81 g of calcium bicarbonate and 0.73 g of magnesium bicarbonate. The hardness...

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Q JEE MAIN 2019

In order to oxidise a mixture of one mole of each of $\mathrm{FeC}_2 \mathrm{O}_4$, $\mathrm{Fe}_2\left(\mathrm{C}_2 \mathrm{O}_4\right)_3$, $\mathrm{FeSO}_4$ and $\mathrm{Fe}_2\left(\mathrm{SO}_4\right)_3$ in...

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Q JEE MAIN 2021

The number of significant figures in 0.00340 is ______ .

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Q JEE MAIN 2021

An average person needs about 10000 kJ energy per day. The amount of glucose (molar mass $=180.0 \mathrm{~g} \mathrm{~mol}^{-1}$ )...

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Q JEE MAIN 2021

Clean water could have BOD value of less than 5 ppm whereas highly polluted water could have a BOD value...

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Q JEE MAIN 2021

Identify the process in which change in the oxidation state is five :

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Q JEE MAIN 2021

250 mL of 0.5 M NaOH was added to 500 mL of 1 M HCl . The number of unreacted...

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Q JEE MAIN 2021

Methylation of 10 g of benzene gave 9.2 g of toluene. Calculate the percentage yield of toluene ______. (Nearest integer)

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Q JEE MAIN 2021

4 g equimolar mixture of NaOH and $\mathrm{Na}_2 \mathrm{CO}_3$ contains x g of NaOH and y g of $\mathrm{Na}_2 \mathrm{CO}_3$....

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Q JEE MAIN 2021

The density of NaOH solution is $1.2 \mathrm{~g} \mathrm{~cm}^{-3}$. The molality of this solution is $\_\_\_\_$ m. (Round off to...

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Q JEE MAIN 2019

The percentage composition of carbon by mole in methane is

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Q JEE MAIN 2021

Consider the reaction. The percentage yield of amide product is _______. (Round off to the Nearest Integer). (Given : Atomic...

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Q JEE MAIN 2021

Consider the above reaction where 6.1 g of benzoic acid is used to get 7.8 g of m -bromo benzoic...

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Q JEE MAIN 2021

Consider titration of NaOH solution versus 1.25M oxalic acid solution. At the end point following burette readings were obtained.(i) 4.5...

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Q JEE Main 2019

A solution of sodium sulfate contains 92 g of $\mathrm{Na}^{+}$ions per kilogram of water. The molality of $\mathrm{Na}^{+}$ions in that...

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Q JEE-Main-2021_

The mole fraction of a solute in a 100 molal aqueous solution $\_\_\_\_$ $\times 10^{-2}$. (Round off to the Nearest...

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Q JEE-Main-2021_

In the above reaction, 3.9 g of benzene on nitration gives 4.92 g of nitrobenzene. The percentage yield of nitrobenzene...

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Q JEE MAIN 2021

When 35 mL of 0.15 M lead nitrate solution is mixed with 20 mL of 0.12 M chromic sulphate solution,...

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Q JEE MAIN 2021

The exact volumes of 1 M NaOH solution required to neutralize 50 mL of $1 \mathrm{M} \mathrm{H}_3 \mathrm{PO}_3$ solution and...

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Q JEE MAIN 2021

The formula of a gaseous hydrocarbon which requires 6 times of its own volume of $\mathrm{O}_2$ for complete oxidation and...

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Q JEE MAIN 2021

$\_\_\_\_$ grams of 3-Hydroxy propanal (MW=74) must be dehydrated to produce 7.8 g of acrolein $(\mathrm{MW}=56)\left(\mathrm{C}_3 \mathrm{H}_4 \mathrm{O}\right)$ if the...

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Q JEE MAIN 2021

In mildly alkaline medium, thiosulphate ion is oxidized by $\mathrm{MnO}_4^{-}$to " A ". The oxidation state of sulphur in "...

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Q JEE MAIN 2021

The $\mathrm{NaNO}_3$ weighed out to make 50 mL of an aqueous solution containing $70.0 \mathrm{mg} \mathrm{Na}^{+}$per mL is $\_\_\_\_$ g....

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Q JEE MAIN 2021

A 6.50 molal solution of KOH (aq.) has a density of $1.89 \mathrm{~g} \mathrm{~cm}^{-3}$. The molarity of the solution is...

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Q JEE MAIN 2021

$2 \mathrm{MnO}_4^{-}+\mathrm{bC}_2 \mathrm{O}_4^{2-}+\mathrm{cH}^{+} \rightarrow \mathrm{xMn}^{2+}+\mathrm{yCO}_2+\mathrm{z} \mathrm{H}_2 \mathrm{O}$ If the above equation is balanced with integer coefficients, the value of c...

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Q JEE MAIN 2021

The number of significant figures in $50000.020 \times 10^{-3}$ is

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Q JEE MAIN 2021

The reaction of sulphur in alkaline medium is the below: $...

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Q JEE MAIN 2021

4.5 g of compound $\mathrm{A}(\mathrm{MW}=90)$ was used to make 250 mL of its aqueous solution. The molarity of the solution...

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Q JEE MAIN 2021

0.4 g mixture of $\mathrm{NaOH}, \mathrm{Na}_2 \mathrm{CO}_3$ and some inert impurities was first titrated with $\frac{\mathrm{N}}{10} \mathrm{HCl}$ using phenolphthalein as...

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Q JEE MAIN 2021

Complete combustion of 1.80 g of an oxygen containing compound $\left(\mathrm{C}_x \mathrm{H}_y \mathrm{O}_z\right)$ gave 2.64 g of $\mathrm{CO}_2$ and 1.08...

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Q JEE MAIN 2021

Which of the following equation depicts the oxidizing nature of $\mathrm{H}_2 \mathrm{O}_2$ ?

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Q JEE MAIN 2022

A 1.84 mg sample of polyhydric alcoholic compound ' $X$ ' of molar mass $92.0 \mathrm{~g} / \mathrm{mol}$ gave 1.344...

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Q JEE MAIN 2022

On complete combustion of 0.492 g of an organic compound containing $\mathrm{C}, \mathrm{H}$ and $\mathrm{O}, 0.7938 \mathrm{~g}$ of $\mathrm{CO}_2$ and...

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Q JEE MAIN 2022

In the given reaction, $$ \mathrm{X}+\mathrm{Y}+3 \mathrm{Z} \rightleftarrows \mathrm{XYZ}_3 $$ if one mole of each of $X$ and $Y$ with...

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Q JEE MAIN 2022

Hemoglobin contains 0.34% of iron by mass. The number of Fe atoms in 3.3 g of hemoglobin is : (Given...

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Q JEE MAIN 2022

When 800 mL of 0.5 M nitric acid is heated in a beaker, its volume is reduced to half and...

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2 L of $0.2 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4$ is reacted with 2 L of 0.1 M NaOH solution, the molarity of...

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Q JEE MAIN 2022

$\begin{aligned} & \mathrm{N}_{2(\mathrm{~g})}+3 \mathrm{H}_{2(\mathrm{~g})} \rightleftharpoons 2 \mathrm{NH}_{3(\mathrm{~g})} \\ & 20 \mathrm{~g} 5 \mathrm{~g}\end{aligned}$ Consider the above reaction, the limiting reagent...

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$$ \begin{aligned} & \mathrm{C}(\mathrm{~s})+\mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{CO}_2(\mathrm{~g})+400 \mathrm{~kJ} \\ & \mathrm{C}(\mathrm{~s})+\frac{1}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{CO}(\mathrm{~g})+100 \mathrm{~kJ} \end{aligned} $$ When coal of purity...

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Given below are the quantum numbers for 4 electrons. A. $\mathrm{n}=3, l=2, \mathrm{~m}_{\square}=1, \mathrm{~m}_{\mathrm{s}}=+1 / 2$ B. $...

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Q JEE MAIN 2022

Consider the reaction $$ 4 \mathrm{HNO}_3(l)+3 \mathrm{KCl}(\mathrm{~s}) \rightarrow \mathrm{Cl}_2(\mathrm{~g})+\mathrm{NOCl}(\mathrm{~g})+2 \mathrm{H}_2 \mathrm{O}(\mathrm{~g})+3 \mathrm{KNO}_3(\mathrm{~s}) $$ The amount of $\mathrm{HNO}_3$ required to produce...

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Q JEE-Main 2022

$\mathrm{SO}_2 \mathrm{Cl}_2$ on reaction with excess of water results into acidic mixture $$ \mathrm{SO}_2 \mathrm{Cl}_2+2 \mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{H}_2 \mathrm{SO}_4+2...

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Q JEE MAIN 2022

The complete combustion of 0.492 g of an organic compound containing ‘C’, ‘H’ and ‘O’ gives 0.793g of $\mathrm{CO}_2$ and...

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Q JEE MAIN 2022

The moles of methane required to produce 81 g of water after complete combustion is $\_\_\_\_$ $\times 10^{-2} \mathrm{~mol}$. [nearest...

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Q JEE MAIN 2022

CNG is an important transportation fuel. When 100 g CNG is mixed with 208 oxygen in vehicles, it leads to...

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Q JEE MAIN 2022

0.25 g of an organic compound containing chlorine gave 0.40 g of silver chloride in Carius estimation. The percentage of...

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Q JEE MAIN 2022

Using the rules for significant figures, the correct answer for the expression $\frac{0.02858 \times 0.112}{0.5702}$ will be:

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Q JEE MAIN 2022

Compound A contains 8.7% Hydrogen, 74% Carbon and 17.3% Nitrogen. The molecular formula of the compound is, Given: Atomic masses...

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Q JEE-Main 2022

0.2 g of an organic compound was subjected to estimation of nitrogen by Dumas method in which volume of $\mathrm{N}_2$...

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Q JEE-Main 2022

When 200 mL of 0.2 M acetic acid is shaken with 0.6 g of wood charcoal, the final concentration of...

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Q JEE MAIN 2022

A protein ‘A’ contains 0.30% of glycine (molecular weight 75). The minimum molar mass of the protein ‘A’ is________ ×...

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Q JEE-Main 2022

120 of an organic compound that contains only carbon and hydrogen gives 330 g of $\mathrm{CO}_2$ and 270 g of...

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Q JEE MAIN 2022

In the estimation of bromine, 0.5 g of an organic compound gave 0.40 g of silver bromide. The percentage of...

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Q JEE MAIN 2022

On complete combustion 0.30 g of an organic compound gave 0.20 g of carbon dioxide and 0.10 g of water....

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Q JEE MAIN 2022

1 L aqueous solution of $\mathrm{H}_2 \mathrm{SO}_4$ contains $0.02 \mathrm{~m} \mathrm{~mol} \mathrm{H}_2 \mathrm{SO}_4 .50 \%$ of this solution is diluted...

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Q JEE MAIN 2024

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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Q JEE MAIN 2024

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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Q JEE MAIN 2022

The number of N atoms is 681 g of $\mathrm{C}_7 \mathrm{H}_5 \mathrm{~N}_3 \mathrm{O}_6$ is $\mathrm{x} \times 10^{21}$. The value of...

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Q JEE MAIN 2022

A commercially sold conc. HCl is 35% HCl by mass. If the density of this commercial acid is 1.46 g/mL,...

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Q JEE-Main 2022

If a rocket runs on a fuel ( $\mathrm{C}_{15} \mathrm{H}_{30}$ ) and liquid oxygen, the weight of oxygen required and...

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Q JEE MAIN 2024

Total number of species from the following which can undergo disproportionation reaction $\_\_\_\_$ . $$ \mathrm{H}_2 \mathrm{O}_2, \mathrm{ClO}_3^{-}, \mathrm{P}_4, \mathrm{Cl}_2,...

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Q JEE MAIN 2024

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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Q JEE MAIN 2024

A and B formed in the following reactions are:

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Q JEE MAIN 2024

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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Q JEE MAIN 2024

If a substance ${ }^{\prime} A$ ' dissolves in solution of a mixture of ${ }^{\prime} B$ ' and $...

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Q JEE MAIN 2024

1 mole of PbS is oxidised by X moles of $\mathrm{O}_3$ to get " Y " moles of $...

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Q JEE MAIN 2024

Volume of 3 MNaOH formula weight $40 \mathrm{~g} \mathrm{~mol}^{-1}$ ) which can be prepared from 84 g of NaOH is...

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Q JEE MAIN 2024

Which of the following cannot function as an oxidising agent ?

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Q JEE MAIN 2025

The amount of calcium oxide produced on heating 150 kg limestone ( pure) is _________ kg. (Nearest integer) Given: Molar...

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Q JEE MAIN 2025

Butane reacts with oxygen to produce carbon dioxide and water following the equation given below. If 174.0 kg of butane...

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Q JEE-Main_2023

Assume carbon burns according to following equation : $2 \mathrm{C}_{(\mathrm{s})}+\mathrm{O}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{CO}(\mathrm{g})$ When 12 g carbon is burnt in...

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Q JEE MAIN 2025

On combustion 0.210 g of an organic compound containing $\mathrm{C}, \mathrm{H}$ and O gave $0.127 \mathrm{gH}_2 \mathrm{O}$ and $0.307 \mathrm{gCO}_2$...

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Q JEE MAIN 2025

Xg of nitrobenzene on nitration gave 4.2 g of m -dinitrobenzene. $\mathrm{X}=$ $\_\_\_\_$ g. (nearest integer) [Given : molar mass...

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Q JEE MAIN 2023

The volume of hydrogen liberated at STP by treating 2.4 g of magnesium with excess of hydrochloric acid is $\_\_\_\_$...

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Q JEE MAIN 2023

The sum of oxidation state of the metals in $\mathrm{Fe}(\mathrm{CO})_5, \mathrm{VO}^{2+}$ and $\mathrm{WO}_3$ is ______

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Q JEE MAIN 2023

See the following chemical reaction: $\mathrm{Cr}_2 \mathrm{O}_7^{2-}+\mathrm{XH}^{+}+6 \mathrm{Fe}^{2+} \rightarrow \mathrm{YCr}^{3+}+6 \mathrm{Fe}^{3+}+\mathrm{ZH}_2 \mathrm{O}$

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Q JEE MAIN 2023

1 g of a carbonate $\left(\mathrm{M}_2 \mathrm{CO}_3\right)$ on treatment with excess HCl produces 0.01 mol of $\mathrm{CO}_2$. The molar mass...

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Q JEE MAIN 2023

0.400 g of an organic compound $(\mathrm{X})$ gave 0.376 g of AgBr in Carius method for estimation of bromine. $\%$...

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Q JEE MAIN 2025

Mass of magnesium required to produce 220 mL of hydrogen gas at STP on reaction with excess of dil. HCl...

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Q JEE MAIN 2023

The covalency and oxidation state respectively of boron in $\left[\mathrm{BF}_4\right]^{-}$, are

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Q JEE MAIN 2025

10 mL of 2 M NaOH solution is added to 20 mL of 1 M HCl solution kept in a...

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Q JEE MAIN 2023

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

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Q JEE MAIN 2023

Which of the following have same number of significant figures? (A) 0.00253 (B) 1.0003 (C) 15.0 (D) 163 Choose the...

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Q JEE MAIN 2023

The mass of NH3 produced when 131.8 kg of cyclohexanecarbaldehyde undergoes Tollen's test is ____ kg. (Nearest Integer) Molar Mass...

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Q JEE MAIN 2023

The molality of a 10\% ( $\mathrm{v} / \mathrm{v}$ ) solution of di-bromine solution in CC14 (carbon tetrachloride) is '...

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Q JEE MAIN 2023

The strength of 50 volume solution of hydrogen peroxide is $\_\_\_\_$ $\mathrm{g} / \mathrm{L}$ (Nearest integer). Given: Molar mass of...

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Q JEE MAIN 2023

Number of hydrogen atoms per molecule of a hydrocarbon A having 85.8% carbon is _________ (Given : Molar mass of...

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Q JEE MAIN 2023

When 0.01 mol of an organic compound containing $60 \%$ carbon was burnt completely, 4.4 g of CO2was produced. The...

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Q JEE MAIN 2023

When a hydrocarbon A undergoes combustion in the presence of air, it requires 9.5 equivalents of oxygen and produces 3...

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Q JEE MAIN 2023

What is the mass ratio of ethylene glycol (C2H6O2, molar mass = 62 g/mol) required for making 500 g of...

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Q JEE MAIN 2023

In Chromyl chloride, the oxidation state of chromium is (+) ____.

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Given below are two statements :- Statement I: In froth floatation method a rotating paddle agitates the mixture to drive...

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The volume (in mL ) of $0.1 \mathrm{M} \mathrm{AgNO}_3$ required for complete precipitation of chloride ions present in 20 mL...

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An organic compound gives 0.220 g of CO2 and 0.126 g of H2O on complete combustion. If the % of...

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In the following reactions, the total number of oxygen atoms in X and Y is ______ $...

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A metal chloride contains 55.0% of chlorine by weight. 100 mL vapours of the metal chloride at STP weigh 0.57...

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The number of molecules and moles in 2.8375 litres of $\mathrm{O}_2$ at STP are respectively

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In ammonium-phosphomolybdate, the oxidation state of Mo is + ………………

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If 5 moles of $\mathrm{BaCl}_2$ is mixed with 2 moles of $\mathrm{Na}_3 \mathrm{PO}_4$, the maximum number of moles of $\mathrm{Ba}_3\left(\mathrm{PO}_4\right)_2$...

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Q JEE MAIN 2023

Which of the following options are correct for the reaction $2\left[\mathrm{Au}(\mathrm{CN})_2\right]^{-}(\mathrm{aq})+\mathrm{Zn}(\mathrm{s}) \rightarrow 2 \mathrm{Au}(\mathrm{s})+\left[\mathrm{Zn}(\mathrm{CN})_4\right]^{2-}{ }_{(\mathrm{aq})}$ A. Redox reaction B. Displacement...

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Some amount of dichloromethane ($\mathrm{CH}_2 \mathrm{Cl}_2$) is added to 671.141 mL of chloroform ($\mathrm{CH} \mathrm{Cl}_3$) to prepare 2.6 × 10–3M...

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Uracil is base present in RNA with the following structure. % of N in uracil is ______. Given: Molar mass...

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5 g of NaOH was dissolved in deionized water to prepare a 450 mL stock solution. What volume (in mL)...

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Zinc reacts with hydrochloric acid to give hydrogen and zinc chloride. The volume of hydrogen gas produced at STP from...

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A physical quantity P is given as The percentage error in the measurement of a, b, c and d are...

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The density of 3 M solution of NaCl is $1.0 \mathrm{~g} \mathrm{~mL}^{-1}$. Molality of the solution is __________ $...

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In sulphur estimation. 0.471 g of an organic compound gave 1.4439 g of barium sulphate. The percentage of sulphur in...

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The density of a monobasic strong acid (Molar mass 24.2 g mol ) is 1.21 kg L . The volume...

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Uracil is base present in RNA with the following structure. % of N in uracil is ______. Given : Molar...

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An athlete is given 100 g of glucose $\left(\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6\right)$ for energy. This is equivalent to 1800 kJ of...

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Q JEE MAIN 2023

5 g of NaOH was dissolved in deionized water to prepare a 450 mL stock solution. What volume (in mL)...

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Q JEE MAIN 2024

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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Q JEE MAIN 2024

Molarity (M) of an aqueous solution containing xg of anhyd. CuSO_4 in 500" " mL solution at 32 ^∘ C...

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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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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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Q JEE MAIN 2024

Among the following halogens $\mathrm{F}_2, \mathrm{Cl}_2, \mathrm{Br}_2$ and $\mathrm{I}_2$

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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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Q JEE-Main 2024

Which of the following reactions are disproportionation reactions?

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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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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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Q JEE MAIN 2024

The mass of sodium acetate (CH_3 COONa) required to prepare 250" " mL of 0.35M aqueous solution is _____ g....

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Q JEE MAIN 2024

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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□( ) 0.05" " cm thick coating of silver is deposited on a plate of 0.05〖" " m〗^2 area. The...

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Q JEE MAIN 2025

Consider the above sequence of reactions. 151 g of 2-bromopentane is made to react. Yield of major product P is...

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In Dumas' method for estimation of nitrogen, 0.5 gram of an organic compound gave 60 mL of nitrogen collected at...

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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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Q JEE MAIN 2024

Element not showing variable oxidation state is :

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Q JEE MAIN 2025

Thyroxine, the hormone has given below structure The percentage of iodine in thyroxine is ____%. (nearest integer) (Given molar mass...

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Q JEE MAIN 2025

An organic compound weighing 500 mg, produced 220 mg of${\rm{C}}{{\rm{O}}_2}$, on complete combustion. The percentage composition of carbon in the...

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Fortification of food with iron is done using ${\rm{FeS}}{{\rm{O}}_4} \cdot 7{{\rm{H}}_2}{\rm{O}}$ . The mass in grams of the ${\rm{FeS}}{{\rm{O}}_4}$. $7{{\rm{H}}_2}{\rm{O}}$...

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Concentrated nitric acid is labelled as $75 \%$ by mass. The volume in mL of the solution which contains 30...

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0.5 g of an organic compound on combustion gave 1.46 g of ${\rm{C}}{{\rm{O}}_2}$ and 0.9 g of ${{\rm{H}}_2}{\rm{O}}$. The percentage...

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Among ${10^{ - 9}}\;{\rm{g}}$ (each) of the following elements, which one will have the highest number of atoms? Element: ${\rm{Pb}},{\rm{Po}},{\rm{Pr}}$...

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The elemental composition of a compound is $54.2 \% \mathrm{C}, 9.2 \% \mathrm{H}$ and $36.6 \% \mathrm{O}$. If the molar...

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0.1 mol of the following given antiviral compound (P) will weigh _____ $\times {10^{-1}}g$ (nearest integer).

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On complete combustion 1.0 g of an organic compound (X) gave 1.46 g of $C{O_2}$ and 0.567 g of ${H_2}O$....

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$CaC{O_3}(s) + 2HCl(aq) \to CaC{l_2}(aq) + C{O_2}(g) + {H_2}O(l)$ Consider the above reaction, what mass of $CaC{l_2}$ will be formed...

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When 81.0 g of aluminium is allowed to react with 128.0 g of oxygen gas, the mass of aluminium oxideproduced...

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0.01 mole of an organic compound $(X)$ containing $10 \%$ hydrogen, on complete-combustion produced$0.9 \mathrm{gH}_{2} \mathrm{O}$. Molar mass of $(\mathrm{X})$...

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Quantitative analysis of an organic compound (X) shows following % composition. C : 14.5% Cl : 64.46% H: 1.8% (Empirical...

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Q JEE MAIN 2025

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

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Xg of benzoic acid on reaction with aq ${\rm{NaHC}}{{\rm{O}}_3}$ released ${\rm{C}}{{\rm{O}}_2}$ that occupied 11.2 L volume at STP. X is...

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Q JEE MAIN 2025

Consider the following reaction occurring in the blast furnace: ${\rm{F}}{{\rm{e}}_3}{{\rm{O}}_{4(\;{\rm{s}})}} + 4{\rm{C}}{{\rm{O}}_{({\rm{g}})}} \to 3{\rm{F}}{{\rm{e}}_{({\rm{l}})}} + 4{\rm{C}}{{\rm{O}}_{2(\;{\rm{g}})}}$ 'x' kg of iron...

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Q JEE MAIN 2025

Which of the following ions is the strongest oxidizing agent? (Atomic Number of Ce = 58, Eu = 63, Tb...

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Q JEE MAIN 2025

$2.8\times {{10}^{{-3}}}~\text{mol}$ of $\text{C}{{\text{O}}_{2}}$ is left after removing ${{10}^{{21}}}$ molecules from its 'X' mg sample. The mass of $\text{C}{{\text{O}}_{2}}$ taken...

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Q JEE MAIN 2025

Given below are two statements : Statement I : One mole of propyne reacts with excess of sodium to liberate...

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20 mL of 2 M NaOH solution is added to 400 mL of 0.5 M NaOH solution. The final concentration...

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Q JEE MAIN 2025

The species which does not undergo disproportionation reaction is :

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