Question

Rate of evaporation decreases as?

(a) temperature increases

(b) humidity of surrounding air increases

(c) movement of air above surface of liquid increases

(d) atmospheric pressure decreases

This question was posed to me during an interview.

My doubt is from Evaporator in chapter Building Blocks of Dairy Processing of Dairy Engineering

Answer 1

Right option is (b) humidity of surrounding air increases

Easiest explanation: Humidity is the amount of water vapor present in the air. The air around us cannot hold more than a definite amount of water vapor at a given temperature. If the amount of water in air is already high, the rate of evaporation decreases.