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

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Solution

When water vapor present in air collides with a cold glass of water, it loses energy and converts to a liquid form, which we perceive as water droplets.
This process is called condensation.
Hence, water drops appear on the outer surface of a glass containing cold water due to condensation.

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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.

Statefor each of the following whether it is dueto evaporation or condensation:

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

(b) Steamrising from wet clothes while they are ironed.

(d) Blackboarddries up after wiping it.

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

Q. Water droplets are formed on the outer surface of a glass containing ice-cold water. Why?

Q. We can find tiny droplets of water on the outer surface of a steel glass containing cold water or ice. This shows that:

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

When water vapor present in air collides with a cold glass of water, it loses energy and converts to a liquid form, which we perceive as water droplets.This process is called condensation.Hence, water drops appear on the outer surface of a glass containing cold water due to condensation.

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

When water vapor present in air collides with a cold glass of water, it loses energy and converts to a liquid form, which we perceive as water droplets.
This process is called condensation.
Hence, water drops appear on the outer surface of a glass containing cold water due to condensation.