Question # 1

The temperature of gas is produced by

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At potential energy of its molecules

The kinetic energy of its molecules

The attractive force between its molecules

The repulsive force between its molecules

Carnot heat engine only used

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isothermal processes

adiabatic processes

both of them

none of them

The state in which ice, water and vapour coexists in equilibrium is called

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zero degree celsius

zero degree fahrenheit

absolute zero

373 K

Hotness and coldness of an object is represented in terms:

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Heat

Temperature

Chemical energy

None of these

At absolute temperature, the kinetic energy of the molecules

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Becomes zero

Becomes maximum

Becomes minimum

Remain constant

Absolute temperature can be calculated by

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Means squares velocity

Motion of the molecule

Both A and B

None of these

The concept of entropy was introduced into the study of thermodynamics in

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1856

1865

1656

1685

The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is

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70%

100%

35%

38%

The nature of thermal radiation is similar to:

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Ultraviolet rays

Light rays

Both of them

None of these

The bicycle pump provides a good example of

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first law of thermodynamics

second law of thermodynamics

third law of thermodynamics

none of them

While deriving equation of pressure by kinetic theory of gases, we take into account:

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Only linear motion of molecules

Only rotational motion

Only vibratory motion

All of these

Which of the following is a state variable

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entropy

pressure

volume

all of them

Efficiency of carnot engine is independent of the

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temperature of sink

temperature of source

nature of the working substances

none of them

The internal energy of an ideal gas system is generally the

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translational K.E of molecules

vibrational K.E of molecules

rotational K.E of molecules

all of them

If a liquid is heated in weightlessness, the heat is transmitted through

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Conduction

Convection

Radiation

Neither, because the liquid cannot be heated in weightlessness

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