Question

name the phenomenon due to which water in an earthen pot becomes cool on what factors does this phenomenon depends and how?

Answer 1

An earthern pot has pores and through these pores water evaporates and we know evaporation causes cooling.

Answer 2

The phenomenon is Evaporation.Earthen pot contains many pores. In an earthen pot, the water (in small amounts) gets evaporated quickly through the pores. Some heat energy is utilised during the process of evaporation.Since the required heat energy is taked from the water itself,it leads to a lowering of temperature in the remaining amount of water.
Evaporation makes the air around the pot wet and cool.Therefore the air around also get cool.