In which of the following case evaporation of water will be the slowest?
(a) A tray of water kept in sunlight.
(b) A kettle of water kept on a burner.
(c) A glass of water kept in a room.
(d) A bucket of water kept on rooftop.

Correct answer: (c) A glass of water kept in a room.

Explanation:  Evaporation is directly proportional to temperature so when temperature increases, evaporation also increases. Room temperature is the lowest temperature as compared to the temperatures of sunlight, burner and rooftop. So, a glass of water kept in a room has the slowest rate of evaporation.