250+ TOP MCQs on Terminology for a Reaction System-IV and Answers

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

1. _______________ is the fraction of the limiting reactant in the feed that is converted into products.
a) Conversion
b) Production
c) Extent of reaction
d) None of the mentioned
Answer: a
Clarification: Conversion is the fraction of the limiting reactant in the feed that is converted into products.

2. Two statements are given as follows
I: Conversion is related to degree of completion.
II: Fraction conversion is dimensionless.
a) Both statements are correct
b) Both statements are incorrect
c) Only one statement is correct
d) None of the mentioned
Answer: a
Clarification: Both I & II are the properties of Conversion.

3. The ratio of extent of reaction that actually occurs and extent of reaction that would occur if complete reaction took place is called
a) Conversion
b) Production
c) Extent of reaction
d) None of the mentioned
Answer: a
Clarification: The ratio of extent of reaction that actually occurs and extent of reaction that would occur if complete reaction took place is called Conversion.

4. 1 mole of C₅H₁₂ is brunt in access air and 200 gms of CO₂ is recovered in the process.
What is the percent conversion?
a) 90.9
b) 80.9
c) 70.9
d) 60.9
Answer: a
Clarification: 1 mole of C₅H₁₂ = 5 moles of CO₂
Percentage conversion = (moles of the limiting reactant in the feed that reacts) / (moles of the limiting reactant introduced in the feed.

5. The theoretical yield and actual yield in a reaction are not equal. It might be because of
a) Impurities among reactants
b) Side reactions
c) Reversible reaction
d) All of the mentioned
Answer: d
Clarification: The reason behind it includes a, b & c all.

6-10. For the given water gas reaction,
CO + H₂O → CO₂ + H₂
The feed consists of 18 moles of CO and 20 moles of steam. In the product, both CO₂ and H₂ are 15 moles.
6. Which is the limiting reactant in water gas reaction?
a) CO
b) H₂O
c) CO₂
d) None of the mentioned
Answer: a
Clarification: 1 mole of CO₂ = 1 moles of H₂O.

7. Which is the excess reactant in water gas reaction?
a) CO
b) H₂O
c) CO₂
d) None of the mentioned
Answer: b
Clarification: 1 mole of CO₂ = 1 moles of H₂O.

8. What is the percentage conversion of the reactant?
a) 83.33
b) 73.33
c) 63.33
d) 53.33
Answer: a
Clarification: percentage conversion = (moles of the limiting reactant in the feed that reacts) / (moles of the limiting reactant introduced in the feed).

9. Kilograms of CO₂ yielded per kg of CO?
a) 1.57
b) 2.34
c) 3.28
d) 4.12
Answer: a
Clarification: 28 kgs of CO = 44 kgs of CO₂.

10. Kilograms of H₂ yielded per kilogram of steam feed?
a) 2.33
b) 4.33
c) 6.33
d) 8.33
Answer: d
Clarification: 20×18 kgs of H₂O = 15×2 kgs of H₂.