How does the water kept in an earthen pot (mataka) become cool during summer?

Options

A. Diffusion
B. Transpiration
C. osmosis
D. evaporation

Answer

D

Explanation

During summer, water kept in an earthen pot becomes cool because of the phenomenon of evaporation. Earthen pot has a large number of tiny pores in its walls and some of the water molecules continuously keep seeping through these pores to outside the pot.
This water evaporates continuously and take the latent required for vaporisation from the remaining water. In this way , the remaining water loses heat and gets cooled.