HARD

JEE Main

IMPORTANT

Earn 100

Calculate, without balancing the following equation, the volume of chlorine at $NTP$ produced from $50 g$ of sodium chloride.

$NaCl + {MnO}_{2} + H_{2} {SO}_{4} \to {NaHSO}_{4} + {MnSO}_{4} + {Cl}_{2} + H_{2} O$

Molar volume (one mole) for an ideal gas at NTP is $22.4 L$

Report your answer by rounding off to the nearest integer value

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Important Questions on Problems Based on Equations: Stoichiometry

HARD

JEE Main

IMPORTANT

Modern Approach to Chemical Calculations>Chapter 2 - Problems Based on Equations: Stoichiometry>PROBLEMS>Q 4

Two tonnes of an iron ore containing

94 %

{Fe}_{2} O_{3}

produces iron in the pure state. Calculate the weight of iron.

HARD

JEE Main

IMPORTANT

Modern Approach to Chemical Calculations>Chapter 2 - Problems Based on Equations: Stoichiometry>PROBLEMS>Q 6

How many litres of detonating gas will be produced at

NTP

in the decomposition of

0.1 mol

of water by an electric current?

HARD

JEE Main

IMPORTANT

Modern Approach to Chemical Calculations>Chapter 2 - Problems Based on Equations: Stoichiometry>PROBLEMS>Q 8

4.90 g

{KClO}_{3}

on heating shows a weight loss of

0.384 g

. What percent of the original

{KClO}_{3}

has decomposed?

HARD

JEE Main

IMPORTANT

Modern Approach to Chemical Calculations>Chapter 2 - Problems Based on Equations: Stoichiometry>PROBLEMS>Q 11

Calculate the weight of $V_{2} O_{5}$ produced in gram from $2 g$ of $VO$ and $5.75 g$ of ${Fe}_{2} O_{3}$ . (in gram up to three decimal points)

$VO + {Fe}_{2} O_{3} \to FeO + V_{2} O_{5}$

$[$ Hint: ${Fe}_{2} O_{3}$ is the limiting reagent.]

HARD

JEE Main

IMPORTANT

Modern Approach to Chemical Calculations>Chapter 2 - Problems Based on Equations: Stoichiometry>PROBLEMS>Q 12

Equal weights of mercury and iodine are allowed to react completely to form a mixture of mercurous and mercuric iodide leaving none of the reactants. Calculate the ratio by weight of undefined and undefined formed.

HARD

JEE Main

IMPORTANT

Modern Approach to Chemical Calculations>Chapter 2 - Problems Based on Equations: Stoichiometry>PROBLEMS>Q 13

5.5 g

of a mixture of

{FeSO}_{4} . 7 H_{2} O

and

{Fe}_{2} {({SO}_{4})}_{3} \cdot 9 H_{2} O

requires

5.4 mL

0.1 N

{KMnO}_{4}

solution for complete oxidation. Calculate the number of moles of hydrated ferric sulphate in the mixture.

MEDIUM

JEE Main

IMPORTANT

Modern Approach to Chemical Calculations>Chapter 2 - Problems Based on Equations: Stoichiometry>PROBLEMS>Q 14

Anhydrous sodium sulphate can absorb water vapour and be converted into the decahydrate. By how many grams would the mass of a

1 g

sample of the thoroughly dried

{Na}_{2} {SO}_{4}

increase if exposed to sufficient water vapour to be converted to the decahydrate?

HARD

JEE Main

IMPORTANT

Modern Approach to Chemical Calculations>Chapter 2 - Problems Based on Equations: Stoichiometry>PROBLEMS>Q 16

1 g

of a sample containing

NaCl

NaBr

and an inert material with excess of

{AgNO}_{3}

produces

0.526 g

of precipitate of

AgCl

and

AgBr

. By heating this precipitate in a current of chlorine,

AgBr

is converted into

AgCl

and the precipitate then weighed

0.426 g

. Find the percentage of

NaCl

and

NaBr

in the sample.

Calculate, without balancing the following equation, the volume of chlorine at NTP produced from 50 g of sodium chloride. NaCl+MnO2+H2SO4→NaHSO4+MnSO4+Cl2+H2O Molar volume (one mole) for an ideal gas at NTP is 22.4 L Report your answer by rounding off to the nearest integer value

Important Questions on Problems Based on Equations: Stoichiometry

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