Question # 1

A gas performs 10 J of work while expanding adiabatically. the change in its internal energy is.

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10 J

-10 J

100 J

-200 J

The measure of hotness or coldness of a substance is.

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Temperature

Heat

Internal energy

Energy

The kinetic energy of molecules of an ideal gas at absolute zero is

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Very low

Very high

Zero

First increases then decreases

The SI unit of product of pressure and volume is.

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_Watt

Joule

Pascal

Newton

The increase in thermal pollution of environment means.

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Increase in the entropy

Decrease in the entropy

Entropy remains constant

Entropy becomes zero

The collision between the gas molecules is

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Elastic

Inelastic

Both a and b

None of these

Which is the process in which temperature of the system remains constant.

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Adiabatic process

Isochoric process

Isothermal process

Isobaric process

If heat engine absorb 400 J and rejects 200 J heat energy, its efficiency will be.

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25%

50%

70%

100%

The internal energy of system does not depend on

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Temperature

Pressure

Path

Final and initial state

For a gas obeying Boyle's Law, if the pressure is doubled, the volume becomes.

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Double

Three fold

One half

Remains the same

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Physics English Medium Fsc Part 1 Chapter 11 Online MCQs Test MCQs With Answers

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