Assertion (A): Water kept in an earthen pot becomes cool in summer.
Reason (R): Water evaporates through the pores of the pot, and this evaporation causes cooling.
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Both Assertion (A) and Reason (R) are correct, and R is the correct explanation of A.
In an Assertion-Reason question, each statement is checked for truth first, and then R is tested as the cause of what A describes.
Assertion — correct. Water stored in a clay pot stays noticeably cooler than the air in summer.
Reason — correct. An earthen pot is porous, so some water seeps out and evaporates from its outer surface.
Evaporation needs heat, which it takes from the pot and the water inside, so the water cools. R therefore explains why A happens.