Question # 1

In an adiabatic expansion, the temperature of the gas

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increases

becomes zero

decreases

decreases rapidly

Absolute temperature can be calculated by

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Means squares velocity

Motion of the molecule

Both A and B

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

Truth of kinetic energy is confirmed by:

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Diffusion of gases

Brownian motion

Both A and B

None of these

When two objects come to common temperature, the body is said to be in:

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Static equilibrium

Dynamic equilibrium

Thermal equilibrium

None of these

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

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

Pressure may be define as _______ per second per unit area:

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Change in force

Change in momentum

Change in energy

Work done

In a heat engine, heat is supplied by the

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cold reservoir

sink

hot reservoir

none of them

The value of E₀in coulomb's law is:

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9 x 10⁹Nm²C^-2

8.85 x 10^-12C²N^-1m^-2

8.85 x 10^-12Nm²C^-2

9 x 10⁹C²N^-1m^-2

The internal energy of an ideal gas system is generally the

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translational K.E of molecules

vibrational K.E of molecules

rotational K.E of molecules

all of them

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

The heat required to raise the temperature of one mole of the substance through 1 K is called

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heat capacity

specific heat capacity

molar specific heat

all of them

An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is

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-20°C

6.67°C

5°C

0°C

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

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

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