Question # 1

Shining silvered surface is a best:

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Emitter

Absorber

Reflector

None of these

Land and sea breezes are the result of:

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Absorption

Radiation

Conduction

Convection

What gas behaves as glass or polythene to radiation:

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Nitrogen

Hydrogen

Carbon di oxide

Methane

There are ______ modes of transfer of heat:

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1

2

3

4

Thermoflask is used maintain:

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Heat

Temperature

Density

Pressure

Conduction on heat occur at ________ rate in materials

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Different

Same

Both A and B

None

Metals are good conductor of heat dut to the:

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Free electron

Big size of their molecule

Small size of their molecules

Rapid vibrations of their atoms

All ________ conduct heat easily:

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Non metals

Gases

Material

Metals

Leslie cube have faces:

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2

3

4

5

Metals are good conductor of heat due to

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Free Electrons

Big size of their molecules

Small size of their molecules

Rapid vibrations of their atoms

Rooms are heated using gas heaters by

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Conduction only

Convection and radiation

Radiation only

Convection only

Leslie's cube is a bod of

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Metal

None Metal

wood

Metalloids

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