Question # 1

In gases, heat in mainly transferred by:

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Molecular collision

Conduction

Convection

Radiaiton

A silvery white surface is a :

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Worst reflector

Best reflector

Worst absorber

Best absorber

The bad conductor of Heat is:

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Iron

Copper

Air

Aluminium

Metals are good conductor of heat due to:

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Free electrons

Reamain same

Small size of their molecules

Rapid vibration of their atoms

Anything kept in thermos :

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In temperature remain constant

Its temperature decrease

Its temperature increase

None of these

Which gas behaves as glass or polythene to radiation:

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Nitrogen

Hydrogen

Carbon di oxide

Methane

In solid, heat is transferred by:

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Radiation

Conduction

Convection

Absorption

Dull black surface are good ____________

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Absorber

Radiator

Conductor

None of these

The example of bad conductor is:

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Wool

Copper

Gold

Iron

Wood, cork,cotton, wool , rubber are the examples of:

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Conductor

Thermal conductor

Insulator

Both a & b

There are ways to transfer the heat from one place to another.

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1

2

3

4

Air and water is conductor:

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Poor

Good

Excellent

None of these

A black dull surface is a good ________ of heat:

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Emitter

Absorber

Reflector

Both A and B

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9th Class Physics Chapter 9 Transfer of Heat English Medium KPK Boards Online Mcqs MCQs With Answers

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