250+ TOP MCQs on Entropy,Chemical Equilibrium and Heat of Reaction and Answers

Steam and Gas Turbines Multiple Choice Questions on “Entropy, Chemical Equilibrium and Heat of Reaction”.

1. The total specific ways in which a thermodynamic system can be arranged is called as ___________
a) entropy
b) enthalpy
c) specific volume
d) none of the mentioned
Answer: a
Clarification: The total specific ways in which a system can be arranged is called entropy.

2. Measure of disorderness is called ________
a) pressure
b) enthalpy
c) entropy
d) none of the mentioned
Answer: c
Clarification: Entropy is the measure of randomness.

3. Entropy of a closed system __________
a) decreases
b) increases
c) remains constant
d) none of the mentioned
Answer:b
Clarification: Entropy of a closed system always increases.

4. During thermodynamic equilibrium entropy is _________ in isolated system.
a) minimum
b) zero
c) maximum
d) none of the mentioned
Answer: c
Clarification: During thermodynamic equilibrium entropy is maximum in isolated system.

5. Entropy is a _______ function.
a) state
b) path
c) point
d) none of the mentioned
Answer: a
Clarification: Entropy is a state function.

6. Entropy is an ___________
a) intensive property
b) extensive property
c) intensive & extensive property
d) none of the mentioned
Answer: b
Clarification: Entropy is an extensive property.

7. Units of entropy are same as of units of energy.
a) True
b) False
Answer: a
Clarification: Energy and Entropy both have same units.

8. Entropy of a pure substance is an ____________
a) point function
b) extensive property
c) intensive property
d) none of the mentioned
Answer: c
Clarification: Entropy of a pure substance is an intensive property. Entropy of pure substances is only intensive if the substance is not pure then the entropy is extensive property.

9. Thermodynamic entropy differs from statistical mechanics entropy by a constant __________
a) Critical pressure
b) Critical pressure & Boltzmann’s constant
c) Boltzmann’s constant
d) None of the mentioned
Answer: c
Clarification: Thermodynamic entropy differs from statistical mechanics entropy differs by a boltzmann’s constant.

10. Perpetual motion machines are derived from the concept of entropy.
a) True
b) False
Answer: a
Clarification: Perpetual motion machines are derived from the concept of entropy.