Question # 1

In Isochoric process there is no

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Work done

Internal energy change

Volume change or work done

Heat exchanged

When the temperature of a body is equal to that of the surrounding then the body appears

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Dull black

Red hot

In thermal equilibrium

To be cold

The specific heat of liquid

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Decreases with temperature

Increases with temperature

Remains constant with change in temperature

Increases with pressure

The law of equation of energy is applicable to the system whose constituents are.

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At rest

In orderly motion

in random motion

Moving at constant speed

The kinetic molecular model of matter describe matter an being made up of molecules in continuous.

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Vibratory motion

Random motion

rotatory motion

Linear motion

Which of the following has negative specific heat

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Ne

CO2

O2

Sturated vapours

The temperature of 1 kg of hydrogen gas is the same as that of 1 kg of helium gas if.

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The gases have the same internal energy

The gas molecules occupy equal volumes

The gas molecules have the same root mean square speed

The gas molecules have same mean translational K.E.

Which of the following should not change in an Isothermal process.

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Volume

Pressure

Temperature

All of these

If T1 and T2 are source and sink temperature respectively Carnot efficiency is.

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T1+T2/T1

T1-T2/T1

T1+T2/T2

T1-T2/T2

Convention is the transfer of thermal energy by means of currents in

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Pressure

Temperature

Liquids

Fluids

Real gases obey gas laws only at

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Low pressure and high temperature

High pressure and low temperature

High pressure and high temperature

Low pressure and low temperature

During an adiabatic gas expansion the environment

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Serves as a heat sink

Serves as a heat source

Must be at a higher temperature than the gas

Does not have to participate

The process in which a system undergoes a change of state at constant volume.

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Isobaric process

Isochoric process

Isothermal process

Adiabatic process

Which kind of thermodynamic process is defined as with no heat transfer into or out of a system i.e. Q =0

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Isobaric process

Isochoric process

Isothermal process

Adiabatic process

If the pressure of a gas is doubled, then its thermal conductivity will

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Increases

Decreases

Remain constant

Be zero

When a perfect gas is supposed to expand freely in an isolated vessel the gas has undergone.

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An increase in pressure

An increase in temperature

A change in phase

A change in entropy

The door of an operating refrigerator in a closed room is opened after sometime the temperature of the room will be

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Lowered

Raised

Unaffected

Become zero

If the temperature of the source and sink are increased by same amount the efficiency of the engine.

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Increases

Decreases

Remains unchanged

May increases of decrease

Which law states that a change in the internal energy of a closed thermodynamic system is equal to the difference between the heat supplied to the system and teh amount of work by the system on the surrounding.

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Zeroth law of thermodynamics

First law of thermodynamics

Second law of thermodynamics

Third law of thermodynamics

Which one of the following gases posses maximum oot mean square velocity.

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Hydrogen

Oxygen

Nitrogen

Carbon dioxide

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