Question # 1

On which of the following the kinetic theory of gases is not applicable.

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Water vapour

Smoke particles

Bound particles

Free electrons

Gases exert pressure on walls of the vessels because gas molecules.

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Possess momentum

Have finite volume

Collide with each other

Obey gas laws

The base unit of temperature in SI is

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Fahrenheit

Celsius

Kelvin

Rnakine

The Fahrenheit and Kelvin scales intersect at

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40

-40

140

-140

Mean free path of gas molecules is inversely proportional to its.

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Volume

Pressure

Temperature

Weight

For which process is the relation Delta Q = Delta V true.

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Isothermal

Adiabatic

isobaric

Isochoric

Which of the following devoices are used for measuring temperature.

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Thermocouples

Thermistors

Thermometers

All of these

Difference between Cp and Cv is equal to

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General gas constant

Planck's conatant

Molar gas constant

Boltzmann's constant

Which of the following is a thermodynamic potential

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Internal energy

Enthalpy

Gibb's free energy

All of these

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

On what factor the internal energy of a thermodynamic system depend upon.

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History

State

Process

Surroundings

If a gas does 10 J of external work white expanding then the change in internal energy is equal to.

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0 J

10 J

-10 J

100 J

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

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Zero

Maximum

Minimum

Negative

Absolute zero may be regarded as the temperature of which

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Water freezes

All substances are solids

All gases become liquids

Molecular motioning a gas would ceases

Which thermometer is called sprint thermometer

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Alcohol thermometer

Mercury in glass thermometer

Gas thermometer

Radiation thermometer

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

On increasing the temperature of source efficiency of Carnot engine.

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Increase

Decrease

First increases and then decreases

Does not change

Most cooking involves

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Adiabatic process

Isothermal process

Isobaric process

Isochoric process

Which of the following is standard scale of temperature

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Mercury scale

Platinum resistance scale

Gas scale

Alcohol scale

If we place oure hand below a lighted lamp we feel warmer due to.

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Conduction

Convection

Radiation

None of these

In the free expansion of a perfect gas there is no.

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work done

Heat exchnged

Internal energy changed

All of the above

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