70ᵗʰ B.P.S.C. Pre-2024
Which of the following are exothermic processes ? (i) Evaporation of water. (ii) Dilution of an acid (H₂SO₄). (iii) Reaction of water with quick lime. (iv) Sublimation of camphor (crystals).
a(iii) and (iv)
b(ii) and (iii)✓ Correct
c(i) and (iv)
d(i) and (ii)
Explanation
Dilution of sulfuric acid (H₂SO₄) and the reaction of water with quicklime are examples of exothermic reactions. A chemical reaction in which heat is released along with the products is defined as an exothermic reaction.
general-science