Question # 1

According to the second law, which is must to produce work

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a source contains a large amount of heat energy

two sources at the same temperature

two sources at the different temperatures

a source contains a small amount of energy

If the formula PV = nRT, n denotes:

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Number of molecules per unit volume

Number of moles

Number of molecules

None of these

The earliest heat engine was

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petrol engine

diesel engine

electric engine

steam engine

If R is gas constant for 1 gram mole, C_pand C_vare specific heat for a solid then

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C_p- C_v= R

C_p- C_{v < R}

C_p- C_{v = 0}

C_p- C_{v > R}

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

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300°C

573°C

600°C

743°C

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

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Each have same number of molecules

Don't have same number of molecules

Can't be predicted

None

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

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heat capacity

specific heat capacity

molar specific heat

molar specific heat at constant volume

A diatomic gas molecule has

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translational energy

rotaional energy

vibrational energy

all of them

Which of the following does not have the same units:

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Work

Heat

Kinetic energy

Power

The absolute temperature of the tripple point of water is

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100°C

4°C

373 K

273.16 K

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

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Metal has high specific heat

Metal has high thermal conductivity

Metal has low specific heat

Metal has low thermal conductivity

The pressure exerted by the gas is

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directly proportional to the P.E

inversely proportional to the P.E

inversely proportional to the K.E

directly proportional to the K.E

Triple point of water is

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273.16°F

372.16K

273.16°F

273.16

The rate of change of momentum of a molecule is equal to:

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Pressure

Work

Density

Force

Hotness and coldness of an object is represented in terms:

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Heat

Temperature

Chemical energy

None of these

First law of thermodynamic is special case of

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Law of conservation of energy

Charle's law

Law of conservation of mass

Boyle's law

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ECAT Physics Chapter 11 Heat & Thermodynamics Online Test MCQs With Answers

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