250+ TOP MCQs on Energy Balances for a Chemical Reaction and Answers

Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Energy Balances for a Chemical Reaction”.

1. A reaction for which heat must be added to the system to maintain isothermal condition is called
a) Endothermic Reaction
b) Exothermic Reaction
c) Neutral Reaction
d) None of the mentioned
Answer: a
Clarification: A reaction for which heat must be added to the system to maintain isothermal condition is called Endothermic Reaction.

2. A reaction for which heat must be removed from the system to maintain isothermal condition is called
a) Endothermic Reaction
b) Exothermic Reaction
c) Neutral Reaction
d) None of the mentioned
Answer: b
Clarification: A reaction for which heat must be removed from the system to maintain isothermal condition is called Exothermic Reaction.

3. Photosynthesis is _________
a) Exothermic
b) Endothermic
c) No heat transfer
d) None of the mentioned
Answer: b
Clarification: Photosynthesis is an Endothermic Reaction as heat is absorbed.

4. Electrolysis of water is
a) Exothermic
b) Endothermic
c) No heat transfer
d) None of the mentioned
Answer: b
Clarification: Photosynthesis is an Endothermic Reaction as heat is absorbed.

5. Burning Butane in a gas grill is
a) Exothermic
b) Endothermic
c) No heat transfer
d) None of the mentioned
Answer: a
Clarification: Combustion is an Exothermic Reaction as heat is released.

6. Rusting of Fe is
a) Exothermic
b) Endothermic
c) No heat transfer
d) None of the mentioned
Answer: a
Clarification: Combustion is an Exothermic Reaction as heat is released.

7. Burning is always an ______________ process.
a) Exothermic
b) Endothermic
c) No heat transfer
d) None of the mentioned
Answer: a
Clarification: Burning is an Exothermic Reaction as heat is released.

8. _________________ is always endothermic.
a) Burning
b) Freezing
c) Condensing
d) Boiling
Answer: d
Clarification: Boiling is an Endothermic Reaction as heat is absorbed.

9. Temperature for standard heat of formation is
a) 298 K
b) 300 K
c) 400 K
d) 528 K
Answer: a
Clarification: Standard temperature = 25 degree Celsius = 25+273 = 298 K.

10. Pressure for standard heat of formation is
a) 1 atm
b) 1 psi
c) 1 Kg/m2
d) None of the mentioned
Answer: a
Clarification: Standard pressure = 1 atm.