Question # 1

The mean kinetic energy of gas is at.

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0 ^oC

-273 ^oC

100 K

100 ^oC

Temperature of a gas is increased from 27 oC to 127 oC. The ratio of its mean K.E. will be

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3/4

9/16

4/3

10/9

Cloud formation in atmosphere is an example of.

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Isothermal process

Isochoric process

Adiabatic process

Isobaric process

The internal energy of a piece of lead when beaten by hammer will.

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Increase

Decrease

Remains constant

Increases and then decrease

According to first law of thermodynamics the quantity which is conserved.

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Force

Momentum

Energy

Power

The difference between tow molar capacities is equal to.

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Plank's constant

General gas equation

Molar gas constant

Boltzmann constant

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

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100%

70%

60%

50%

A cycle of petrol engine undergoes

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Two process

Three process

Four process

single process

The unit o pressure of gas is

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Nm^-2

Pascal

Atmosphere

All of these

If the temperature of sink is absolute zero then the efficiency of heat engine engine should be.

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100%

50%

Infinite

zero

A constant temperature, if pressure of a given mass of gas is halved, then its volume becomes.

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Halve

Doubled

Four time

Constant

The potential energy to the molecules of an ideal gas is considered to be.

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Maximum

Zero

1/2 kx²

1/2 kx

The collision between the gas molecules is

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Elastic

Inelastic

Both a and b

None of these

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 curve representing an adiabatic process is called.

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An adiabatic

An isotherm

Both of these

None of these

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

The internal energy of system does not depend on

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Temperature

Pressure

Path

Final and initial state

Value of triple point of water is given as.

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Zero K

100 K

273.16 K

373.16 K

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