Question

During summer days, water kept in an earthen pot (pitcher) becomes cool because of the phenomenon of (a) diffusion
(b) transpiration
(c) osmosis
(d) evaporation

Answer 1

d)evaporation

Explanation:

We are asked to find what phenomenon makes water kept in earthen pot , cool .

• We notice that earthen pot has small holes in it.
• So water inside the pot comes out through these tiny holes.
• When they come out through the surface they have to evaporate so theyll be needing latent heat of vapourization.
• This latent heat of vapourization is taken from the water inside the pot .
• So there will be a reduction in the heat of the water in the pot.
• This phenomenon of water converting into gas is evaporation so that would be the required answer.

Answer 2

Answer is Option (d) Evaporation

Explanation:

• An earthen pot gives cool water even in the summer seasons when water is kept into it, and the reason for this is Evaporation.

• The Seepage of the water molecules into the earthen pot, due to the presence of large number of holes or tiny pores in its walls.

• There is continuous evaporation of water due to the latent heat of evaporation, reason being vaporization from leftover water.

Finally, we can say that the leftover water keeps itself cools by losing heat.