Question # 1

Latent heat of vaporization is denoted by:

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H1

Hm

Hv

Hf

In kelvin scale, lower reference point is:

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273 K

373 K

180 K

100 K

Alcohol has specific heat in Jkg^-1 K^-1 is:

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2500

4200

1000

138.6

Bimetallic strip works on the principle of

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expansion of metals

contraction of metals

both (A) and (B)

unequal expansion of metals

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

Normal human body temperature is

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15oC

37oC

37oF

98.6oC

In Fahrenheit scale, upper refrence point is:

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32 ^oF

212 ^oF

180 ^oF

100 ^oF

Specific heat for iron in joule per kilogram per kelvin is:

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387

920

470

903

How many scales of measurement of temperature are?

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One

Two

Three

Four

Evaporation causes:

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Melting

Boiling

Freezing

Cooling

If a liquid of mass 'm' requires thermal energy 'ΔQv' to completely change into gas at its boiling point without any change in its temperature, then its latent heat of vapourization can be calculated as following:

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Hv = m/ΔQv

Hv = mΔQv

Hv = cmΔQv

Hv =ΔQv/m

Degree of hotness or coldness a body is called:

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Heat

Internal Energy

Temperature

Potential energy

Steam is used to run machine because of high amount of ___________ heat.

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Latent

Great

Large

Nil

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