Question # 1

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 efficiency of diesel engine is about

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25 % to 30%

35% to 40%

40% to 50%

50% to 60%

Entropy remains constant.

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Isothermal process

Adiabatic process

Isochoric process

Isobaric process

Almost all the raw energy is librated from

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Heat

Earth

Light

All of these

The molecules of an ideal gas exert

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Force on each other

No force on each other

Large force on each other

Pressure on each other

Pascal is the unit of

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Pressure

Force

Tension

Weight

For working of heat engine, there must be.

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A source

A sink

either of these

Both of these

The efficiency of diesel engine is about

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25% to 30%

35% to 40%

40% to 50%

50% to 60%

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 motion of gas molecules is

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In the same direction

Random

Walls of container

Opposite to each other

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

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 curve representing an adiabatic process is called.

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An adiabatic

An isotherm

Both of these

None of these

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

The behaviour of gases is discussed by

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Knowing their nature

Knowing their temperature

Kinetic theory

Maxwell's theory

The temperature of human body on Kelvin scale is

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210K

310K

410K

510K

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

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

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Physics Fsc Part 1 Chapter 11 Online Test MCQs With Answers

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