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Physics English Medium Fsc Part 1 Chapter 11 Online MCQs Test MCQs With Answers

Question # 1

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

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Question # 2

Which remains constant in an adiabatic process.

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Volume

Pressure

entropy

temperature

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Question # 3

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%

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Question # 4

A system does 600 J of work and at the same time has its internal energy increased by 320 J. How much heat has been supplied.

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28o J

920 J

600 J

200 J

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Question # 5

At constant temperature and pressure, if volume of given mass of a gas is doubled then density is.

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Doubled

1/4 original

1/2 of original

Unchanged

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Question # 6

The efficiency of a Carnot Heat Engine is 100% if temperature of sink T2 is.

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0 ^oC

0 K

0 ^oF

100 K

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Question # 7

Pascal is the unit of

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Pressure

Force

Tension

Weight

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Question # 8

Which of following is irreversible process

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Slow compression of an elastic spring

Slow evaporation of substances in isolated vessel

Slow expansion of a gas

A chemical explosion

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Question # 9

The temperature of human body on Kelvin scale is

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210K

310K

410K

510K

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Question # 10

The efficiency of diesel engine is about

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25% to 30%

35% to 40%

40% to 50%

50% to 60%

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Question # 11

Which is the process in which temperature of the system remains constant.

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Adiabatic process

Isochoric process

Isothermal process

Isobaric process

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