Question # 1

the change in internal energy is defined as

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Q - W

Q-T

Q + P

Q - P

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

During adiabatic process, which factor remains constant.

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Entropy

Pressure

Momentum

Power

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

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25%

50%

70%

100%

Entropy of measure of.

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Internal energy of system

Order of system

Disorder of system

Potential energy of system

Cloud formation in atmosphere is an example of.

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Isothermal process

Isochoric process

Adiabatic process

Isobaric process

Which is an example of irreversible process.

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Explosion

Evaporation

Slow compression

A chemical explosion

The efficiency of diesel engine is about

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25% to 30%

35% to 40%

40% to 50%

50% to 60%

A device based upon the thermodynamics property of matter is called.

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Calorimeter

Heat engine

thermometer

Voltmeter

The difference between tow molar capacities is equal to.

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Plank's constant

General gas equation

Molar gas constant

Boltzmann constant

Carnot cycle consists of.

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Two steps

Three steps

Four steps

Five steps

The collision between the gas molecules is

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Elastic

Inelastic

Both a and b

None of these

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

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Positive

Negative

Zero

None of these

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 entropy of the universe with passage of time is.

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Increases

Decreases

Remain constant

Increases and decreases

Which remains constant in an adiabatic process.

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Volume

Pressure

entropy

temperature

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

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

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11th Class Part 1 Physics Chapter 11 Test Online MCQs With Answers

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