Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 49 (11 MCQs)

Quiz Instructions

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1. Which law of thermodynamics is applicable to the thermometer?

Correct Answer: A) Zeroth.

2. Heat does not spontaneously flow from a colder body to a hotter one. Which of the following thermodynamics law states this?

Correct Answer: C) Second law of thermodynamics.

3. What does the second law of thermodynamics imply about the direction of heat transfer?

Correct Answer: B) Heat flows from hot to cold spontaneously.

4. What is the significance of the Gibbs free energy?

Correct Answer: D) Gibbs free energy indicates the spontaneity of a process and the maximum reversible work obtainable from a system.

5. Entropy is often called "time's arrow" because

Correct Answer: B) Macropscopic processes evolve toward a specific energy configuration and never evolve away from that configuration.

6. What will be the minimum amount of work required to operate a refrigerator machine which removes 4.2 Kj of heat at 273 K and rejects it at 323 K.

Correct Answer: A) 650 Joules.

7. Which phase of matter has the greatest motion and least orderly arrangement?

Correct Answer: C) Gas.

8. Elucidate the definition of 'activation energy':

Correct Answer: C) The energy essential for initiating a reaction.

9. For any spontaneous processes, $\Delta G$

Correct Answer: B) Negative.

10. What condition is necessary for heat to flow between two objects?

Correct Answer: C) They must have different temperatures.

11. The energy held between bonds of atoms & is released when the bond is broken.

Correct Answer: D) Chemical energy.