# Chemical Process Calculation Questions and Answers – Terminology for a Reaction System-II

This set of Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Terminology for a Reaction System-II”.

1-4. For the given reaction, extent of the reaction is 2 moles reacting.
H2S2O7 + H2O → 2H2SO4
1. How much kg of H2S2O7 is required as per reaction extent?
a) 712
b) 356
c) 178
d) 89

Explanation: Kg of H2S2O7 is= 2*178 = 356.

2. How much kg of H2O is required as per reaction extent?
a) 18
b) 36
c) 54
d) 72

Explanation: Kg of H2O required= 2*18 = 36.

3. How many moles of the product are collected?
a) 2
b) 4
c) 6
d) 8

Explanation: Moles of the product = 2*2 = 4.

4. If the kg amount of both the reactants is doubled. What is the extent of the reaction?
a) 2
b) 4
c) 6
d) 8

Explanation: If we double the kg amount of reactant, we double the moles. The extent becomes double.

5. What is extent of reaction the reaction, if 40 moles CO2 is produced?
2CO + O2 → 2CO2
a) 5
b) 10
c) 20
d) 40

Explanation: Extent of the reaction = (40– 0)/2 = 20.
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6-8. N2 + 2O2 → 2NO2
6. What is the extent of reaction if 5 moles of N2 is required for the reaction?
a) 5
b) 10
c) 15
d) 20

Explanation: Extent of reaction = (5 – 0)/1 = 5.

7. What is the extent of reaction if 10 moles of O2 is required for the reaction?
a) 5
b) 10
c) 15
d) 20

Explanation: Extent of reaction = (10 – 0)/2 = 5.

8. What is the extent of reaction if 10 moles of NO2 are produced inthe reaction?
a) 5
b) 10
c) 15
d) 20

Explanation: Extent of reaction = (10 – 0)/2 = 5.

9-10. H2O2 + H2 → 2H2O
For the given reaction, if the extent of reaction is 20.
9. How much water is produced in the reaction?
a) 10 moles
b) 20 moles
c) 30 moles
d) 40 moles

Explanation: 20 = (x – 0)/2, x = 40 moles.

10. How much H2O2 is required as per extent?
a) 10 moles
b) 20 moles
c) 30 moles
d) 40 moles