Question # 1

The temperature scale which is independent of nature of substance is.

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Thermodynamic scale

Centigrade scale

Fahrenheit scale

Regnault scale

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

In case the work done in zero.

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Constant pressure

Constant volume

Constant temperature

Constant mass

The entropy of the universe with passage of time is.

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Increases

Decreases

Remain constant

Increases and decreases

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

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Force

Momentum

Energy

Power

For working of heat engine, there must be

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A source

A sink

Ether of these

Both of them

A cycle of petrol engine undergoes

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Two process

Three process

Four process

single process

In the thermodynamics process , the equation W = -delta U represents.

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Isothermal expension

Isothermal compression

Adiabatic expansion

Adiabatic compression

The unit o pressure of gas is

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Nm^-2

Pascal

Atmosphere

All of these

The efficiency of any heat engine can never be

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+ve

100%

-ve

None of these

The actual efficiency of property turned petrol engine is.

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20% to 30%

30% to 35%

40% to 45%

25% to 30%

The energy processes, we use are

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Efficient

Not efficient

Reversible

None of these

The behaviour of gases is discussed by

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Knowing their nature

Knowing their temperature

Kinetic theory

Maxwell's theory

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

Pressure 'P' of a gas is defined as

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F/A

FA

F/V

F/D

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

Which remains constant in an adiabatic process.

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Volume

Pressure

entropy

temperature

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