Question # 1

Ice at ............ °C is more effective in cooling.

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0

-1

-2

-3

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

An instrument is used for measuring temperature is called:

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Barometer

Thermometer

Voltmeter

None of above

Gallium (element) melts at:

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40 °C

30 °C

80 °C

90 °C

Which gas is used inspite of Freon gas in refrigerator?

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CO₂

H₂

NH₃

N₂

The boiling point of mercury is:

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-10 ^oC

150^oC

375^oC

457^oC

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

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

without heating:

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Cooling

Vaporization

Evaporation

Sublimation

Degree of hotness or coldness measures the body:

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Heat

Temperature

Energy

Thermal

Water freezes at:

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0° F

32°F

-273 K

0 K

When ice is cooled below 0 ^oC it:

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Expand

Contracts

Boils

None of these

The freezing point of Mercury is:

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49 ^oC

-49^oC

39^oC

-39^oC

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

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