Question 2 (a)

State for the following whether it is due to evaporation or condensation:
Water drops appear on the outer surface of a glass containing cold water.

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Solution

Water drops appear on the outer surface of a glass containing cold water. This occurs due to the process known as condensation.

When the water vapour (gas) present in the air, comes in contact with a cold surface, here the cold surface is the outer surface of a glass containing cold water. It condenses to form water (liquid), which is present in the form of water droplets on the outer surface of the glass. This process of conversion of water from its vapour or gaseous form (state) into liquid form (state) is known as condensation.

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Similar questions

State for each of the following whether it is due to evaporation or condensation:

(a) Water drops appear on the outer surface of a glass containing cold water.

(b) Steam rising from wet clothes while they are ironed.

(d) Blackboard dries up after wiping it.

(e) Steam rising from a hot girdle when water is sprinkled on it.

State for each of the following whether it is due to evaporation or condensation :
(a) Water drops appear on the outer surface of a glass containing cold water.
(b) Steam rising from wet clothes while they are ironed.
(c) Fog appearing on a cold winter morning.
(d) Blackboard dries up after wiping it.
(e) Steam rising from a hot girdle when water is sprinkled on it.

Question 3

(i) What do you mean by evaporation?

(ii) Why do we see water droplets on the outer surface of a glass containing ice-cold water?

Q. Water drops appear on the outer surface of a glass containing cold water. Give a suitable reason for this occurance.

Question 2 (c)

State for the following whether it is due to evaporation or condensation:
Fog appearing on a cold winter morning.

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Question 2 (a) State for the following whether it is due to evaporation or condensation: Water drops appear on the outer surface of a glass containing cold water.

Question 2 (a)

State for the following whether it is due to evaporation or condensation:
Water drops appear on the outer surface of a glass containing cold water.