Question # 1

Boltzman constant 'k' has same unit as.

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Temperature

Energy

Entropy

Pressure

Which remains constant in an adiabatic process.

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Volume

Pressure

entropy

temperature

A cycle of petrol engine undergoes

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Two process

Three process

Four process

single process

The SI unit of product of pressure and volume is.

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_Watt

Joule

Pascal

Newton

The unit o pressure of gas is

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Nm^-2

Pascal

Atmosphere

All 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

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

An ideal heat engine can only be 100% efficient if its cold temperature reservoir is at.

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0 K

0 ^oC

100 K

100 ^oC

Entropy of measure of.

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Internal energy of system

Order of system

Disorder of system

Potential energy of system

During adiabatic process, which factor remains constant.

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Entropy

Pressure

Momentum

Power

Which of following is irreversible process

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Slow compression of an elastic spring

Slow evaporation of substances in isolated vessel

Slow expansion of a gas

A chemical explosion

Efficiency of steam locomotive is.

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8%

10%

9%

7%

No of spark plugs needed in the diesel engine are.

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0

1

2

3

If heat is added to a system, then its entropy will.

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Increases and positive

Decrease and positive

Increases but negative

Decreases but negative

A system does 600 J of work and at the same time has its internal energy increased by 320 J. How much heat has been supplied.

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28o J

920 J

600 J

200 J

In reversible process the entropy of system.

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Remain constant

Decrease

Increase

Becomes zero

A heat engine operates between the temperature 1000 K and 400 K, Its efficiency is.

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100%

70%

60%

50%

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Physics ICS Part 1 Chapter 11 Online Test MCQs With Answers

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