Question # 1

A gas performs 10 J of work while expanding adiabatically. the change in its internal energy is.

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10 J

-10 J

100 J

-200 J

S.I Unit of pressure of gas is.

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Nm

N.m

N2/m

N3m

The collision between the gas molecules is

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Elastic

Inelastic

Both a and b

None of these

For a gas obeying Boyle's Law, if the pressure is doubled, the volume becomes.

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Double

Three fold

One half

Remains the same

The mean kinetic energy of gas is at.

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0 ^oC

-273 ^oC

100 K

100 ^oC

The temperature of human body on Kelvin scale is

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210K

310K

410K

510K

The efficiency of any heat engine can never be

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+ve

100%

-ve

None 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

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

Pascal is the unit of

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Pressure

Force

Tension

Weight

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

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Isothermal expension

Isothermal compression

Adiabatic expansion

Adiabatic compression

Entropy of measure of.

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Internal energy of system

Order of system

Disorder of system

Potential energy of system

Environmental crisis are also known as

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Population crisis

Entropy crisis

War crisis

Mass crisis

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

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-273 ^oC

0 K

273 K

-273 K

The entropy of the universe with passage of time is.

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Increases

Decreases

Remain constant

Increases and decreases

The efficiency of heat engine whose sink is at 17 ^oC and source at 200 ^oC is.

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38%

63%

80%

90%

No of spark plugs needed in the diesel engine are.

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0

1

2

3

Almost all the raw energy is librated from

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Heat

Earth

Light

All of these

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Physics Fsc Part 1 Chapter 11 Online Test MCQs With Answers

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