MCQ Thermodynamics Chapter 6 Class 11 Chemistry

1. Which of the following relations is correct for an adiabatic process?

P∆V = 0

∆U = q

∆q = 0

q = + w

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Question 1 of 10

2. A system absorbs 500 kJ heat and performs 250 kJ work on the surroundings. The increase in internal energy of the system is:

250 kJ

750 kJ

500 kJ

1000 kJ

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Question 2 of 10

3. The enthalpies of all elements in their standard states are

negative

zero

infinite

positive

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Question 3 of 10

4. If q amount of heat is supplied to a system, the work done by the system is w . What is the change in internal energy of the system?

ΔU = q - w

ΔU = q / w

ΔU = q + w

ΔU = q x w

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Question 4 of 10

5. The difference between heats of reaction at constant pressure and constant volume for the reaction:

-3RT

2RT

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Question 5 of 10

6. The internal energy of a system is

Kinetic as well as potential energy

Potential energy only

Unpredictable

Kinetic energy only

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Question 6 of 10

7. The process in which no exchange of heat takes place between system and surrounding is known as

Adiabatic process

Isothermal process

Isobaric process

Isochoric process

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Question 7 of 10

8. Evaporation of water is:

An exothermic change.

A process accompanied by chemical reaction.

An endothermic change.

A process in which no heat changes occur.

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Question 8 of 10

9. Which of the following is a state function?

Heat

Internal energy

Pressure

Volume

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Question 9 of 10

10. Tea placed in a closed vessel is an example of

isolated system

closed system

insulated system

open system

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Question 10 of 10