Question

A why do we wear cotton clothes in summers ? B why do we feel cold, when we keep acetone and ether on our palm ?

Answer 1

Answer:

A) We should wear cotton clothes in summer because during summers we tend to sweat a lot and cotton fabric absorbs this sweat and helps the body to cool down. Cotton clothes provide better air circulation leading to more absorption of sweat and thus gives a cooling effect to us.

B) We feel cold when we keep acetone and enther on our palm becausethey absorb the latent heat for vaporization from our palm and evaporates which causes cooling. The particles gain energy from thepalm or the surrounding and evaporates causing the palm to feel cold.

Answer 2

A

1. It absorbs sweat.
2. It allows the air to pass through it.

B. Acetone,petrol and perfume are volatile substance that gets evaporated when they come in contact with air Evaporation is facilitated as it uses energy from the palm hence leaving a cooling effect on our palms.