Read the given passage and fill in the blanks by choosing an appropriate option. There are some changes in which heat from outside is absorbed leaving the surroundings cooler while in other changes heat is given out making the surroundings warmer. A change in which heat is given out is called a/an (i) ______ change e.g., (ii)________, while a change in which heat is taken in is called a/an (iii)_________ change e.g., (v)_______.

Answer

C

Explanation

A change in which heat is given out is called an exothermic change while a change in which heat is absorbed is called an endothermic change. Slaking of lime is an exothermic change while dissolution of glucose in water is an endothermic change. No heat change is observed when sand and water are mixed.