Question

Multiple Choice Questions

1. Conduction takes place in:

a) solids only

b) liquids only

c) gases only

d) in solids, liquids and gases

2. In which mode of transfer of heat do the molecules travel from the hot to the cold portion?

a) Conduction

d) All of these

b) Convection

c) Radiation

3. Handles of cooking utensils should be made of a material that:

a) conducts heat well.

b) does not conduct heat well.

c) radiates heat well.

d) does not radiates heat well.

4. Convection occurs in:

a) solids only

b) Liquids only

c) gases only

d) liquids and gases only

5. Sea and land breezes:

a) are caused by currents set up in air due to conduction

b) are caused by currents set up in air due to convection

c) are caused by currents set up in air due to radiation

d) have no relation to conduction, convection, or radiation

6. A thermos flask prevents loss or gain of heat by:

a) conduction only

b) convection only

c) radiation only

d) all of the above

7. Which of these is the best conductor of heat?

a) Iron

b) Water

c) Nitrogen

8. Which of these is the best insulator of heat?

a) Aluminium

b) Alcohol

C) AIR

d) petrol



9. The transfer of heat from molecule to molecule, without movement of molecules from one place to another is:

a) conduction

b) convection

c) radiation​

Answer 1

Answer:

1,d . 2d 3c 4a http server

Answer 2

Answer:

1 - Solids only

2- All of these

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