Question

Choose the correct option. [5]

a) What is the temperature of boiling water?

i. 212 °F

ii. 273 K

iii. 99 °C

iv. 120 °F

b) Conduction is the mode of heat transfer in ____

i. Solids

ii. Liquids

iii. Gases

iv. All of them

c) The sides of the double walls of a thermos flask facing each other are made shiny because

i. Shiny surfaces absorb more heat

ii. Shiny surfaces are bad conductors

iii. Shiny surfaces are bad radiators of heat

iv. None of these

d) Sound cannot be produced in

i. Solids

ii. Liquids

iii. Vacuum

iv. Gases

e) An iron ball of 50 °C is dropped in a mug containing water at 50 °C. The heat will

i. Flow from the ball to the water
ii. Flow from the water to the ball

iii. Not flow

iv. Increase the temperature of both​

Answer 1

Answer:

a) 99 ° C is the boiling temperature

b) sound cannot be produced in vaccum