Question

During summers, water kept in an earthen pot becomes cool. The phenomenon responsible for this is ______.

a) freezing
b) evaporation
c) boiling
d) melting
[1 Mark]

Answer 1

Option (b) is correct. i.e., evaporation
[1 Mark]

• The phenomenon of change of a liquid into vapour below its boiling point is called evaporation.
• As an earthen pot is porous, water reaches the surface of the earthen pot and evaporates. Energy is absorbed by the particles when they convert from a liquid into gas. This loss of energy during evaporation causes cooling of water inside the earthen pot.