Question

Rate of evaporation of a liquid decreases with ……. in humidity.

Answer 1

Evaporation is a process in which the liquid changes to vapours even below its boiling point. This process requires heat energy. For example, common salt is obtained from the sea using the process of evaporation, drying of clothes, etc.

Factors affecting evaporation are:

1. Temperature
2. Surface Area
3. Humidity
4. Wind speed
5. Nature of the liquid.

Humidity: Humidity is defined as the number of water vapours present in the air. The rate of evaporation decreases with an increase in humidity. Hence the evaporation increases when air is less humid.

Conclusion: The rate of evaporation of a liquid decreases with increase in humidity.