Question # 1

A finite volume of gas consists of

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Small no. of molecules

Large no. of molecule

Average no. of molecule

None of these

In reversible process the entropy of system.

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Remain constant

Decrease

Increase

Becomes zero

The measure of hotness or coldness of a substance is.

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Temperature

Heat

Internal energy

Energy

At which of the following temperature a body has maximum internal energy.

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-273 ^oC

0 K

273 K

-273 K

Which remains constant in an adiabatic process.

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Volume

Pressure

entropy

temperature

The SI unit of product of pressure and volume is.

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_Watt

Joule

Pascal

Newton

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 curve representing an adiabatic process is called.

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An adiabatic

An isotherm

Both of these

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

Value of triple point of water is given as.

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Zero K

100 K

273.16 K

373.16 K

A diatomic gas molecules has

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Translational energy only

Rotational energy only

Vibrational energy only

All translational, Rotational and vibrational energy

The mean kinetic energy of gas is at.

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0 ^oC

-273 ^oC

100 K

100 ^oC

For a diatomic gas Cv= 5R/2 then gamma for this gas is.

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5/7

4/35

7/5

35/4

For working of heat engine, there must be.

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A source

A sink

either of these

Both of these

The energy processes, we use are

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Efficient

Not efficient

Reversible

None of these

the change in internal energy is defined as

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Q - W

Q-T

Q + P

Q - P

The entropy of the universe with passage of time is.

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Increases

Decreases

Remain constant

Increases and decreases

Heat is form of.

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Power

Momentum

Energy

Torque

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