Question

3. Conduction can take place when (a) two objects are in contact. (b) temperatures of two objects are not same. (c) both (a) and (b). (d) none of these. 4. Cooking utensils are made up of metals because metals are (a) durable. (b) good conductors of heat. (c) easy to clean. (d) none of these. 5. A wooden spoon is used to make vegetable in a metal frying pan. Its other end (a) becomes hot because of conduction. (b) becomes hot because of convection. (c) becomes hot because

of radiation. (d) does not become hot. 6. A thermos flask keeps a liquid hot by preventing heat loss through (a) conduction. (b) convection. (c) radiation. (d) all of these. 7. The temperature of water can be measured with the help of (a) maximum and minimum thermometer. (b) metal thermometer. (d) clinical thermometer. (c) laboratory thermometer.​

Answer 1

Explanation:

3.a) when two objects are in contact

4.b) they are good conductors of heat

5.d) does not becomes hot

6.b) convection

7.c) laboratory thermometer

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Answer 2

3 .both and b

4 .b

5.d

6.b

7.c

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