37. NCERT Exemplar XVII

 

 

Sweating is a natural mechanism to keep our bodies dissolvecoolmiscibleheat. Our body sweats a lot on hot summer days. A cotton cloth absorbs sweat quickly, while a nylon cloth does not.

Evaporation of sweat absorbed by cotton cloth resulted in a dissolvingheatingcoolingfreezing effect on our bodies. The rate of evaporation also increases with the increase in surface area.

When one wears cotton cloth on hot summer days, it quickly absorbs the sweat coming from our bodies. The surface volumesurface molesurface areasurface mass of sweat also increases as it is absorbed by the cotton cloth, which increases the evaporation rate. One who wears cotton cloth feels more comfortable because of the cooling effect due to the decompositioncombinationevaporationvapourization of sweat.

Hence, Priyanshi, who wears the cotton cloth, will feel more comfortableuncomfortableunderstandableuncontrollable, while Ali does not.