Question # 1

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

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Adiabatic process

Isochoric process

Isothermal process

Isobaric process

The ideal gas law is.

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PV =NVk

P = NkT

PV =nRT

P=nRT

The entropy of the universe with passage of time is.

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Increases

Decreases

Remain constant

Increases and decreases

Force acting on the piston to move outward is.

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Compressive stoke

Power stoke

All stoke

Exhaust stoke

If the temperature of a gas is constant then <1/2 mv2> of the molecules of gas will be.

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Constant

Zero

Increase

Decrease

No spark plug is needed in the

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Petrol engine

Diesel engine

Gas engine

Water engine

Not change in entropy of a system after one complete Carnot cycle is.

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Positive

Negative

Zero

None of these

The measure of hotness or coldness of a substance is.

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Temperature

Heat

Internal energy

Energy

Average translational K.E. of molecules for an ideal gas is given as

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1/2 KT

KT

2/3 KT

3/2 KT

The motion of gas molecules is

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In the same direction

Random

Walls of container

Opposite to each other

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 number of spark plug needed in diesel engine is

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0

2

3

4

The SI unit of product of pressure and volume is.

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_Watt

Joule

Pascal

Newton

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

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25%

50%

70%

100%

For working of heat engine, there must be

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A source

A sink

Ether of these

Both of them

For working of heat engine, there must be.

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A source

A sink

either of these

Both of these

The temperature scale which is independent of nature of substance is.

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Thermodynamic scale

Centigrade scale

Fahrenheit scale

Regnault scale

Heat is form of.

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Power

Momentum

Energy

Torque

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Physics Fsc Part 1 Chapter 11 Online Test MCQs With Answers

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