Question # 1

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

When ice is cooled below 0 ^oC it:

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Expand

Contracts

Boils

None of these

Length of a rod is L∘ on temperature T∘. After heating upto temperature T, its length L becomes

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L = L∘ (1 + αΔT)

L = L∘ (1 + ΔT)

L = L∘ (1 - αΔT)

L = L∘ (1 -ΔT)

In ___________ (CFC) was found reacting with ozone.

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1920s

1970s

1950s

1960s

Bimetal strip is made up of two different metal:

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Copper & iron

Brass & Iron

Brass & Nickel

Copper & Nickel

Kinetic energy of the molecules depends on its:

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Temperature

Surface are

Density

Volume

Evaporation takes place from liquid :

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Everywhere

Above surface only

Below surface only

Middle of liquid

The value of latent heat of vaporization of water is:

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2.26 x 10⁶ Jkg^-1

2.29 x 10⁵Jkg^-1

2.26 x 10^-6Jkg^-1

3.29 x 10^-5Jkg^-1

If 'm' is a mass of a body and 'c' is its specific heat, then its heat capacity is a given by

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m/c

c/m

mc

mc2

Water boils at:

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0°F

0°C

100°C

100 K

How many scales of measurement of temperature are?

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One

Two

Three

Four

___________ specific heat of water is benefits in sustaining life.

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High

Low

Medium

None

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

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