This set of Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Terminology for a Reaction System-V”.
1. The ratio of the moles of a particular product produced to the moles of another product produced in a reaction is called
a) Percentage conversion
b) Selectivity
c) Extent of reaction
d) None of the mentioned
View Answer
Explanation: The ratio of the moles of a particular product produced to the moles of another product produced in a reaction is called Extent of reaction.
2. Which is the incorrect definition for yield?
a) The amount of desired product obtained divided by the amount of key reactant feed
b) The amount of desired product obtained divided by the amount of key reactant consumed
c) The amount of a product obtained divided by the theoretical amount of the product that would be obtained based on the limiting reactant in the chemical reaction equation if it were completely consumed
d) None of the mentioned
View Answer
Explanation: Different set of definitions are there in every case.
3. How many moles of Cl2 are present in the feed?
Reaction: Cl2 + C4H8 → C4H7Cl + HCl
Data: Cl2: 160 g-moles
a) 160
b) 170
c) 210
d) 230
View Answer
Explanation: Moles of Cl2 = 160 + 40 (Reacting in second reaction) + 10 (Reacting in first reaction).
4. How many moles of C4H8 are present in the feed?
Reaction: Cl2 + C4H8 → C4H7Cl + HCl
Data: C4H8: 400 g-moles, C4H7Cl: 10 g-moles, C4H8Cl2: 40 g-moles
a) 400
b) 410
c) 440
d) 450
View Answer
Explanation: Moles of C4H8 = 400 + 40 (Reacting in second reaction) + 10 (Reacting in first reaction).
5. Which of the following is the limiting reactant in the given reactions?
Reaction: Cl2 + C4H8 → C4H7Cl + HCl
Data: Cl2: 160 g-moles, C4H8: 400 g-moles, C4H7Cl: 10 g-moles, C4H8Cl2: 40 g-moles
a) Cl2
b) C4H8
c) C4H7Cl
d) None of the mentioned
View Answer
Explanation: Cl2 has lower extent of reaction.
6. Which reactant is in excess in the given reactions?
Reaction: Cl2 + C4H8 → C4H7Cl + HCl
Data: Cl2: 160 g-moles, C4H8: 400 g-moles, C4H7Cl: 10 g-moles, C4H8Cl2: 40 g-moles
a) Cl2
b) C4H8
c) C4H7Cl
d) None of the mentioned
View Answer
Explanation: C4H8 has higher extent of reaction.
7. What is the fractional conversion of C4H8 to C4H7Cl in the reaction?
Reaction: Cl2 + C4H8 → C4H7Cl + HCl
Data: C4H7Cl: 10 g-moles (formed in the first reaction), C4H8: 450 g-moles (total reacted in both reactions)
a) 0.022
b) 0.044
c) 0.066
d) 0.088
View Answer
Explanation: Fractional conversion = 10/450.
8. What is the selectivity of C4H7Cl relative to C4H8Cl2 in the reaction?
Reaction: Cl2 + C4H8 → C4H7Cl + HCl
Data: C4H7Cl: 10 g-moles (formed in the first reaction), C4H8Cl2: 40 g-moles (formed in the second reaction)
a) 0.25
b) 0.50
c) 0.75
d) 1.00
View Answer
Explanation: Selectivity = 10 (gm moles of C4H7Cl)/40 (gm moles of C4H8Cl2).
9. What is the extent of the following reaction?
Reaction: Cl2 + C4H8 → C4H7Cl + HCl
Data: C4H7Cl: 10 g-moles
a) 10
b) 20
c) 30
d) 40
View Answer
Explanation: The extent of the first reaction is determined by the moles of C4H7Cl formed, which is 10 g-moles.
10. What is the extent of the following reaction?
Reaction: Cl2 + C4H8 → C4H8Cl2
Data: C4H8Cl2: 40 g-moles
a) 10
b) 20
c) 30
d) 40
View Answer
Explanation: The extent of the second reaction is determined by the moles of C4H8Cl2 formed, which is 40 g-moles.
Sanfoundry Global Education & Learning Series – Chemical Process Calculation.
To practice all areas of Chemical Process Calculation, here is complete set of 1000+ Multiple Choice Questions and Answers.
