Paheli asked for a glass of water from Boojho. He gave her a glass of ice cold water. Paheli observed some water droplets on the outer surface of the glass and asked Boojho how these droplets of water were formed. Which of the following should be Boojho’s answer?
(a) Evaporation of water from the glass.
(b) Water that seeped out from the glass.
(c) Evaporation of atmospheric water vapour.
(d) Condensation of atmospheric water vapour.

Correct Answer: (d) Condensation of atmospheric water vapour.

Explanation: When the air touches the surface of ice cold glass, the water vapours of the atmosphere are condensed to form water droplets on the outer surface of glass.