Question # 1

The changing of a liquid into vapours from the surface of the liquid without heating:

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Cooling

Vaporization

Evaporation

Sublimation

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

Transfer of heat between two bodies which are at same temperature is:

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Maximum

Minimium

Positive

Zero

Water freezes at .

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0^o F

32 ^oF

-273 K

0 K

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

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

Which expands on heating?

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Water

Steel

Copper

All are true

In summers the railways bends due to:

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Expansion

Contraction

Both

None

Evaporation takes place from liquid :

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Everywhere

Above surface only

Below surface only

Middle of liquid

In ___________ (CFC) was found reacting with ozone.

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1920s

1970s

1950s

1960s

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

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Thermometer

Acidimeter

Barometer

Clock timer

What will be the value of β for a solid for which α has a value of 2 x 10^-5 C^-1

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2 x 10^-5 K^-1

6 x 10^-5 K^-1

8 x 10^-15 K^-1

8 x 10^-5K^-1

Which of the following is produced in refrigerators by evaporation of a liquefied gas?

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Heating

Cooling

Freezing

Melting

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Physics 9th Class English Medium Unit 8 Online Test MCQs With Answers

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