Question # 1

What is the SI unit for thermal conductivity.

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W m-1 K-1

W m-2 k-2

W m-3 k-1

J kg -1 k-1

Specific heat a different substances varies becouse of

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Same number of molecules in unit mass

Different number of molecules in unit mass

Different K.E. of molecules in unit mass

Same K.E. of molecules in unit mass

Which of the following is a clinical thermometer.

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Gas thermometer

Mercury thermometer

Alcohol thermometer

Radiation thermometer

Which quantity must be the same for two bodies if they are to be in thermal equilibrium.

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Internal energy

P.E

Temperature

Mass

Which of the following has maximum specific heat.

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Glass

Iron

Brass

Lead

Which of the following should not change in isothermal operation.

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Heat constant

Volume

Pressure

Temperature

A gas thermometer is more sensitive than a mercury thermometer because the expansion of gas for 1 o/c rise in temperature is.

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Five times as much as mercury

Ten times as much as mercury

Twenty times as much as mercury

Hundred times as much as mercury

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

Which following properties of molecules of a gas is same for all gases at a particular temperature.

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Momentum

Mass

velocity

K.E.

The ration Cv/Cp = y for a diatomic gas like air is

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1.29

1.30

1.40

1.67

At absolute zero of temperature.

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The molecular energy is zero

Molecules have translational K.E

Molecules have rotational K.E.

Molecules have maximum energy

A given quantity of an ideal gas is at pressure P and temperature T What is the isothermal bulk modulus of the gas.

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2/3 P

P

2P

3/2 P

The ratio between the energy dissipated in some process and the heat that appears as a result is the

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Specific heat

Mechanical equivalent of heat

Kilocalories

Triple point

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

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Conduction

Convection

Radiation

None of these

Which quantity provides a quantitative measure of disorder.

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Entropy

Enthalpy

Randomness

Chaos

The internal inertia of a thermodynamics system is known as.

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Enthalpy

Entropy

Isotherm

Adiabatic

The temperature which is the same in ^oC and ^oF is.

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-20

-40

20

40

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

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Hydrogen

Oxygen

Nitrogen

Carbon dioxide

A 4 kJ mass of copper of specific heat capacity of 400 J kg-1k-1 is heated for 160 s by a heater of power 200 W what is the rise in temperature.

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10 K

16 K

100 K

160 K

Change in which parameter determines the work done by a gas during adiabatic prcoess.

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volume

Pressure

Temperature

Weight

The internal energy of monoatomic gas is.

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3/2 RT

Independent of temperature

In the form of K.E.

Partially kinetic and partially potential

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