Question # 1

Absolute zero is considered as that temperature at which:

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All liquid become gases

All gases become liquid

Water freezes

None of these

Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be

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R/2

P

2P

Depending on the relative mass of the gases

It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of

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Clausius statement of second law

Kelvin'sstatement of second law

Clausius statement of first law

Kelvin's statement of first law

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

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Non-uniform density

uniform density

high density

low density

When the temperature of source and sink of a heat engine become equal entropy change will be

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Zero

Max

Min

-ve

Melting point of ice

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Increases with increasing pressure

Decreases with increasing pressure

Is independent of pressure

Is proportional to pressure

One mole of any substance contain

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same number of molecules

different number of molecules

may be same or different

none of them

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

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0 J

2 J

5 J

10 J

We cannot utilize the heat contents of oceans and atmosphere because

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there is no reservoir at the same temperature

there is no reservoir at the temperature lower than any one of two

there is no reservoir at the temperature higher than any one of two

none of them

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

The disorder in the system increases due to the

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removal of heat

addition of heat

removal or addition of heat

none of them

Generally a temperature scale is established by

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one fixed point

two fixed point

three fixed point

four fixed point

The ideal gas law is

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P = nRT

V = nRT

PV =RT

PV =nRT

Triple point of water is

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273.16°F

372.16K

273.16°F

273.16

The work done on the system by the environment is considered as

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positive

negative

zero

any one of them

The volume of universal gas constant R is:

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8.314 J/K mole K

8314 J/K mole K

8.314 J/mole K

None of these

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

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