Ch 1 + Ch 2

1

Which surface is a good emitter of heat?

A Shiny surface B Polished surface C Black surface D White surface

2

Pressure of gas decreases if:

A Temperature increases B Volume decreases C Volume increases D Collisions increase

3

Which factor does not affect specific heat capacity?

A Nature of substance B Mass C Temperature change D Material

4

Heat flow in geothermal systems occurs mainly by:

A Conduction B Convection C Radiation D Evaporation

5

Latent heat depends on:

A Mass only B Material only C Mass and material D Temperature only

6

Convection occurs mostly in:

A Solids B Liquids and gases C Vacuum D Metals only

7

Which state of matter is most compressible?

A Solid B Liquid C Gas D Plasma

8

Solar cooker works mainly on:

A Conduction B Convection C Radiation D Evaporation

9

Evaporation takes place at:

A Boiling point only B Melting point C All temperatures D Freezing point

10

Which substance has a high specific heat capacity?

A Iron B Copper C Water D Aluminium

11

Which phenomenon supports kinetic theory of matter?

A Reflection B Brownian motion C Refraction D Diffraction

12

Geothermal energy is considered:

A Non-renewable B Renewable C Polluting D Limited

13

When temperature of a gas increases, pressure increases because:

A Mass increases B Collisions increase C Volume decreases D Density decreases

14

Which country extensively uses geothermal energy?

A Pakistan B Iceland C China D Brazil

15

Thermal expansion in liquids is measured by:

A Linear expansion B Area expansion C Volume expansion D Mass expansion

16

Latent heat of fusion is related to:

A Solid to gas B Liquid to gas C Solid to liquid D Gas to liquid

17

Coefficient of linear expansion depends on:

A Shape of object B Size of object C Material of object D Mass of object

18

During evaporation, average kinetic energy of remaining liquid:

A Increases B Decreases C Remains same D Becomes zero

19

Which color is the best absorber of heat?

A White B Silver C Black D Yellow

20

Global warming is mainly due to:

A Deforestation B Greenhouse gases C Volcanoes D Ocean currents

21

Heat transfer in room heaters mainly occurs by:

A Conduction B Radiation C Convection D Evaporation

22

Superconductivity was first discovered in:

A Copper B Iron C Mercury D Silver

23

The SI unit of specific heat capacity is:

A J/kg B J/°C C J/kg°C D W/m°C

24

Black pots are used in solar cookers because:

A They reflect heat B They absorb heat C They conduct electricity D They cool fast

25

Handles of cooking pans are made of wood because:

A Wood is heavy B Wood is cheap C Wood is a poor conductor of heat D Wood looks good