BITSAT PYQs for Stoichiometry and Stoichiometric Calculations with Solutions: Practice BITSAT Previous Year Questions

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Yashodeep Mahurkar

Updated on - Dec 16, 2025

Stoichiometry and Stoichiometric Calculations is an important topic in the Chemistry section in BITSAT exam. Practising this topic will increase your score overall and make your conceptual grip on BITSAT exam stronger.

This article gives you a full set of BITSAT PYQs for Stoichiometry and Stoichiometric Calculations with explanations for effective preparation. Practice of BITSAT Chemistry PYQs including Stoichiometry and Stoichiometric Calculations questions regularly will improve accuracy, speed, and confidence in the BITSAT 2026 exam.

BITSAT PYQs for Stoichiometry and Stoichiometric Calculations with Solutions

1.
How many moles of oxygen are required to completely combust 1 mole of propane (C$_3$H$_8$)?
- 4 moles
- 6 moles
- 5 moles
- 3 moles
View Solution
2.
$1.5 \,g$ of $CdCl_2$ was found to contain $0.9 \,g$ of $Cd$. Calculate the atomic weight of $Cd$.
- 118
- 112
- 106.5
- 53.25
View Solution
3.
How many grams of $ \text{CO}_2 $ are produced when 10 g of $ \text{C}_2\text{H}_6 $ (ethane) is completely combusted? Reaction: $ 2\text{C}_2\text{H}_6 + 7\text{O}_2 \rightarrow 4\text{CO}_2 + 6\text{H}_2\text{O} $
- 29.3 g
- 44.0 g
- 58.6 g
- 88.0 g
View Solution
4.
$3.92\,g$ of ferrous ammonium sulphate react completely with $50\, ml \frac{N}{10} KMnO_{4}$ solution. The percentage purity of the sample is
- 50
- 78.4
- 80
- 39.2
View Solution
5.
$1.25\, g$ of a sample of $Na _{2} CO _{3}$ and $Na _{2} SO _{4}$ is dissolved in $250\, ml$ solution. $25 ml$ of this solution neutralises $20\, ml$ of $0.1\, N\, H _{2} SO _{4}$. The $\%$ of $Na _{2} CO _{3}$ in this sample is
- 84.80%
- 8.48%
- 15.20%
- 42.40%
View Solution

6.
Match the following:

List-I List-n (At STP)

(A) $10 \, g \, CaCO_3 \xrightarrow [\text{decomposition}]{\Delta}$ (i) $0.224 \, L \, CO_2$

(B) $1.06 \, g \, Na_2 CO_3 \xrightarrow{\text{Excess HCl}}$ (ii) $4.48 \, L \, CO_2$

(C) $2.4 \, g \, C \xrightarrow [\text{combustion}]{Excess \, O_2}$ (iii) $0.448 \, L \, CO_2$

(D) $0.56 \, g \, CO \xrightarrow [\text{combustion}]{\text{Excess} O_2}$ (iv) $2.24 \, L \, CO_2$

(v) $22.4 \, L \, CO_2$

The correct match is

List-I	List-n (At STP)
(A)	$10 \, g \, CaCO_3 \xrightarrow [\text{decomposition}]{\Delta}$	(i)	$0.224 \, L \, CO_2$
(B)	$1.06 \, g \, Na_2 CO_3 \xrightarrow{\text{Excess HCl}}$	(ii)	$4.48 \, L \, CO_2$
(C)	$2.4 \, g \, C \xrightarrow [\text{combustion}]{Excess \, O_2}$	(iii)	$0.448 \, L \, CO_2$
(D)	$0.56 \, g \, CO \xrightarrow [\text{combustion}]{\text{Excess} O_2}$	(iv)	$2.24 \, L \, CO_2$
		(v)	$22.4 \, L \, CO_2$

A $\rightarrow$ iv , B $\rightarrow$ i , C $\rightarrow$ ii , D $\rightarrow$ iii
A $\rightarrow$ v , B $\rightarrow$ i , C $\rightarrow$ ii , D$\rightarrow$ iii
A $\rightarrow$ iv , B $\rightarrow$ i , C $\rightarrow$ iii , D $\rightarrow$ ii
A $\rightarrow$ i , B $\rightarrow$ iv , C $\rightarrow$ ii , D $\rightarrow$ iii

View Solution

7.
What volume of CO$_2$ gas at STP is produced by the reaction of 10 g of CaCO$_3$ with excess HCl?
- 4.48 L
- 2.24 L
- 8.96 L
- 11.2 L
View Solution
8.
$0.45 \,g$ of acid molecular weight $90$ is neutralised by $20\, ml$ of $0.5\,N$ caustic potash. The basicity of acid is
- 1
- 2
- 3
- 4
View Solution
9.
Formation of polyethylene from calcium carbide takes place as follows $ CaC _{2}+2 H _{2} O \longrightarrow Ca ( OH )_{2}+ C _{2} H _{2}$ $C _{2} H _{2}+ H _{2} \longrightarrow C _{2} H _{4} $ $ nC _{2} H _{4} \longrightarrow\left(- CH _{2}- CH _{2}-\right) n$ The amount of polyethylene obtained from $64.1\, kg$ of $CaC _{2}$ is
- 7 Kg
- 14 Kg
- 21 Kg
- 28 Kg
View Solution
10.
The normality of $26\%$ (wt/vol) solution of ammonia (density $= 0.855$ ) is approximately :
- 1.5
- 0.4
- 15.3
- 4
View Solution
11.
The enthalpy of combustion of $2$ moles of benzene at $27^{\circ} C$ differs from the value determined in bomb calorimeter by
- - 2.494 kJ
- 2.494 kJ
- - 7.483 kJ
- 7.483 kJ
View Solution
12.
The number of moles of CO$_2$ produced when 2 moles of C$_2$H$_6$ are completely burnt is:
- 4
- 8
- 12
- 6
View Solution
13.
In the reaction $ 2\text{SO}_2 + \text{O}_2 \rightarrow 2\text{SO}_3 $, if 64 g of $\text{SO}_2$ reacts completely, how many grams of $\text{SO}_3$ are produced? (Molar mass of $\text{SO}_2 = 64 \, \text{g/mol}, \text{SO}_3 = 80 \, \text{g/mol}$)
- 80 g
- 64 g
- 100 g
- 128 g
View Solution

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BITSAT PYQs for Stoichiometry and Stoichiometric Calculations with Solutions: Practice BITSAT Previous Year Questions

BITSAT PYQs for Stoichiometry and Stoichiometric Calculations with Solutions

1.
How many moles of oxygen are required to completely combust 1 mole of propane (C\(_3\)H\(_8\))?

2.
$1.5 \,g$ of $CdCl_2$ was found to contain $0.9 \,g$ of $Cd$. Calculate the atomic weight of $Cd$.

3.
How many grams of $ \text{CO}_2 $ are produced when 10 g of $ \text{C}_2\text{H}_6 $ (ethane) is completely combusted? Reaction: $ 2\text{C}_2\text{H}_6 + 7\text{O}_2 \rightarrow 4\text{CO}_2 + 6\text{H}_2\text{O} $

4.
$3.92\,g$ of ferrous ammonium sulphate react completely with $50\, ml \frac{N}{10} KMnO_{4}$ solution. The percentage purity of the sample is

5.
$1.25\, g$ of a sample of $Na _{2} CO _{3}$ and $Na _{2} SO _{4}$ is dissolved in $250\, ml$ solution. $25 ml$ of this solution neutralises $20\, ml$ of $0.1\, N\, H _{2} SO _{4}$. The $\%$ of $Na _{2} CO _{3}$ in this sample is

7.
What volume of CO$_2$ gas at STP is produced by the reaction of 10 g of CaCO$_3$ with excess HCl?

8.
$0.45 \,g$ of acid molecular weight $90$ is neutralised by $20\, ml$ of $0.5\,N$ caustic potash. The basicity of acid is

10.
The normality of $26\%$ (wt/vol) solution of ammonia (density $= 0.855$ ) is approximately :

11.
The enthalpy of combustion of $2$ moles of benzene at $27^{\circ} C$ differs from the value determined in bomb calorimeter by

12.
The number of moles of CO$_2$ produced when 2 moles of C$_2$H$_6$ are completely burnt is:

13.
In the reaction \( 2\text{SO}_2 + \text{O}_2 \rightarrow 2\text{SO}_3 \), if 64 g of \(\text{SO}_2\) reacts completely, how many grams of \(\text{SO}_3\) are produced? (Molar mass of \(\text{SO}_2 = 64 \, \text{g/mol}, \text{SO}_3 = 80 \, \text{g/mol}\))

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BITSAT PYQs for Stoichiometry and Stoichiometric Calculations with Solutions

1.How many moles of oxygen are required to completely combust 1 mole of propane (C\(_3\)H\(_8\))?

2.$1.5 \,g$ of $CdCl_2$ was found to contain $0.9 \,g$ of $Cd$. Calculate the atomic weight of $Cd$.

3.How many grams of $ \text{CO}_2 $ are produced when 10 g of $ \text{C}_2\text{H}_6 $ (ethane) is completely combusted? Reaction: $ 2\text{C}_2\text{H}_6 + 7\text{O}_2 \rightarrow 4\text{CO}_2 + 6\text{H}_2\text{O} $

4.$3.92\,g$ of ferrous ammonium sulphate react completely with $50\, ml \frac{N}{10} KMnO_{4}$ solution. The percentage purity of the sample is

5.$1.25\, g$ of a sample of $Na _{2} CO _{3}$ and $Na _{2} SO _{4}$ is dissolved in $250\, ml$ solution. $25 ml$ of this solution neutralises $20\, ml$ of $0.1\, N\, H _{2} SO _{4}$. The $\%$ of $Na _{2} CO _{3}$ in this sample is

7.What volume of CO$_2$ gas at STP is produced by the reaction of 10 g of CaCO$_3$ with excess HCl?

8.$0.45 \,g$ of acid molecular weight $90$ is neutralised by $20\, ml$ of $0.5\,N$ caustic potash. The basicity of acid is

10.The normality of $26\%$ (wt/vol) solution of ammonia (density $= 0.855$ ) is approximately :

11.The enthalpy of combustion of $2$ moles of benzene at $27^{\circ} C$ differs from the value determined in bomb calorimeter by

12.The number of moles of CO$_2$ produced when 2 moles of C$_2$H$_6$ are completely burnt is:

13.In the reaction \( 2\text{SO}_2 + \text{O}_2 \rightarrow 2\text{SO}_3 \), if 64 g of \(\text{SO}_2\) reacts completely, how many grams of \(\text{SO}_3\) are produced? (Molar mass of \(\text{SO}_2 = 64 \, \text{g/mol}, \text{SO}_3 = 80 \, \text{g/mol}\))

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1.
How many moles of oxygen are required to completely combust 1 mole of propane (C\(_3\)H\(_8\))?

2.
$1.5 \,g$ of $CdCl_2$ was found to contain $0.9 \,g$ of $Cd$. Calculate the atomic weight of $Cd$.

3.
How many grams of $ \text{CO}_2 $ are produced when 10 g of $ \text{C}_2\text{H}_6 $ (ethane) is completely combusted? Reaction: $ 2\text{C}_2\text{H}_6 + 7\text{O}_2 \rightarrow 4\text{CO}_2 + 6\text{H}_2\text{O} $

4.
$3.92\,g$ of ferrous ammonium sulphate react completely with $50\, ml \frac{N}{10} KMnO_{4}$ solution. The percentage purity of the sample is

5.
$1.25\, g$ of a sample of $Na _{2} CO _{3}$ and $Na _{2} SO _{4}$ is dissolved in $250\, ml$ solution. $25 ml$ of this solution neutralises $20\, ml$ of $0.1\, N\, H _{2} SO _{4}$. The $\%$ of $Na _{2} CO _{3}$ in this sample is

7.
What volume of CO$_2$ gas at STP is produced by the reaction of 10 g of CaCO$_3$ with excess HCl?

8.
$0.45 \,g$ of acid molecular weight $90$ is neutralised by $20\, ml$ of $0.5\,N$ caustic potash. The basicity of acid is

10.
The normality of $26\%$ (wt/vol) solution of ammonia (density $= 0.855$ ) is approximately :

11.
The enthalpy of combustion of $2$ moles of benzene at $27^{\circ} C$ differs from the value determined in bomb calorimeter by

12.
The number of moles of CO$_2$ produced when 2 moles of C$_2$H$_6$ are completely burnt is:

13.
In the reaction \( 2\text{SO}_2 + \text{O}_2 \rightarrow 2\text{SO}_3 \), if 64 g of \(\text{SO}_2\) reacts completely, how many grams of \(\text{SO}_3\) are produced? (Molar mass of \(\text{SO}_2 = 64 \, \text{g/mol}, \text{SO}_3 = 80 \, \text{g/mol}\))