Question

Which condition out of the following will increase the evaporation of water?

• A. Increase in temperature of the water
• B. Decrease in temperature of the water
• C. The less exposed surface area of water
• D. Adding common salt to the water

Answer 1

The correct option is A

Increase in temperature of the water

Explanation for correct option:

A. Increase in temperature of the water

Evaporation:

• It is a process in which a phase transition occurs from the liquid phase to the gaseous phase.

Effect of temperature on evaporation:

• The evaporation of water will increase by increasing the temperature of the water as at higher temperatures, the molecules move faster; therefore, it is more likely for a molecule to have enough energy to break away from the liquid to become a gas.

Explanation for incorrect options:

B. Decrease in temperature of the water will decrease the rate of evaporation.

C. Less exposed surface area of water will decrease the rate of evaporation, It will increase on increasing the surface area.

D. On adding common salt to the water, the escaping tendency of solvent particles decreases, and thus the evaporation of water decreases.

Hence, the correct option is A i.e. Increase in the temperature of the water.