Question

Give a reason for the following statement.

The rate of evaporation decreases with an increase in humidity.

Answer 1

Humidity - It is the amount of water vapour or moisture that is present in the air.

• A dry atmosphere can hold more water molecules than a humid atmosphere. Hence, the rate of evaporation of aqueous solution decreases with the increase of humidity and vice versa.
• The rate of evaporation decreases with an increase in humidity.
• For example - If air already has a sufficient amount of moisture, then it cannot absorb more of it.
• Hence, the rate of evaporation decreases.

Therefore, we can say that the rate of evaporation decreases with an increase in humidity.