Question # 1

The freezing point of Mercury is:

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49 ^oC

-49^oC

39^oC

-39^oC

Kinetic energy of the molecules depends on its:

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Temperature

Surface are

Density

Volume

Evaporation causes:

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Melting

Boiling

Freezing

Cooling

The unit of Heat is:

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Kelvin

Joule

Jkg^-1 K^-1

kg

Water freezes at

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0oF

32oF

273 K

0 K

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

"Latent" is derived from ............... word.

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Latin

English

Greek

Roman

A large water reservoir heeps the temperature of nearby land moderate due to:

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Low temperature

Low specific heat of water

Less absorption of heat

Large specific heat of water

Heat travels from __________

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Colder to hotter

Hotter to colder

Both a & b are possible

None of above

The temperature at which a solid start melting is:

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Freezing point

Melting point

Fusion point

Both B and C

Absolute zero is equal to

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0 K

273

-273 K

373 K

___________ specific heat of water is benefits in sustaining life.

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High

Low

Medium

None

Which of the following affects evaporation?

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Temperature

Surface area of the liquid

Wind

All of the above

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