Question # 1

Kinetic energy of the molecules depends on its:

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Temperature

Surface are

Density

Volume

Expansion in one meter steel is:

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1.0 mm

0.1 mm

1.0 mm

1.3 mm

Which gas is used inspite of Freon gas in refrigerator?

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CO₂

H₂

NH₃

N₂

Normal human body temperature is :

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15°C

98.6°C

37°C

37°F

In Fahrenheit scale, upper refrence point is:

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32 ^oF

212 ^oF

180 ^oF

100 ^oF

Mercury is used as thermometric material because it has

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Uniform thermal expansion

Low freezing point

Small heat capacity

All the above properties

If the mass of a body is 'm' and change in its temperature isΔT, then the heat absorbed or released is given by

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ΔQ = cmΔT

ΔQ = mΔT

ΔQ = 2cΔT

ΔQ = cmΔT2

The upper reference point in thermometer is used to check:

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Melting point

Freezing point

Boiling point

Streaming point

The device that is used to measure the temperature of a body called

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Thermometer

Acidimeter

Barometer

Clock timer

Process by which liquids changes into vapors is ............... .

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Vaporization

Evaporation

Boiling

None of above

The changing of a liquid into vapours from the surface of the liquid

without heating:

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Cooling

Vaporization

Evaporation

Sublimation

Evaporation takes place from liquid :

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Everywhere

Above surface only

Below surface only

Middle of liquid

Latent heat of fusion of water is:

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3.36 x 10¹⁰ Jkg^-1

93.6 x 10¹⁰Jkg^-1

3.36 x 10⁵Jkg^-1

None of these

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