This set of 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
View Answer
Explanation: 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
View Answer
Explanation: 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
View Answer
Explanation: 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
View Answer
Explanation: 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
View Answer
Explanation: The reason behind it includes a, b & c all.
6. Which is the limiting reactant in the water gas reaction, CO + H2O → CO2 + H2?
a) CO
b) H2O
c) CO2
d) None of the mentioned
View Answer
Explanation: The limiting reactant is the one that will be completely consumed first in the reaction. In this case, 1 mole of CO reacts with 1 mole of H2O, so the limiting reactant is CO.
7. Which is the excess reactant in the water gas reaction, CO + H2O → CO2 + H2?
a) CO
b) H2O
c) CO2
d) None of the mentioned
View Answer
Explanation: The excess reactant is the one that is in surplus after the reaction. In this case, H2O is in excess because CO is the limiting reactant.
8. What is the percentage conversion of the limiting reactant in the water gas reaction, CO + H2O → CO2 + H2?
a) 83.33
b) 73.33
c) 63.33
d) 53.33
View Answer
Explanation: percentage conversion = (moles of the limiting reactant in the feed that reacts) / (moles of the limiting reactant introduced in the feed).
9. For the water gas reaction: CO + H2O → CO2 + H2. How many kilograms of CO2 are produced per kilogram of CO reacted, assuming a molar mass of 28 g/mol for CO and 44 g/mol for CO2?
a) 1.57
b) 2.34
c) 3.28
d) 4.12
View Answer
Explanation: For every 28 g of CO, 44 g of CO2 is produced, so the ratio is: 44 / 28 = 1.57.
10. In the water gas reaction: CO + H2O → CO2 + H2. How many kilograms of H2 are produced per kilogram of H2O fed, given a molar mass of 18 g/mol for H2O and 2 g/mol for H2?
a) 2.33
b) 4.33
c) 6.33
d) 8.33
View Answer
Explanation: Each 18 g of H2O produces 2 g of H2, so for 1 kg of H2O, (1000 g / 18) × 2 ≈ 8.33 kg of H2 is produced.
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.
