Question

The salt which will give a neutral solution on dissolving in water will be:
(a) CH₃COONa
(b) NH₄Cl
(c) KCl
(d) Na₂CO₃

Answer 1

KCl
KCl is formed from a strong acid, hydrochloric acid (HCl), and a strong base, potassium hydroxide (KOH). On dissolving in water, KCl hydrolyses to form equal amounts of H⁺ and OH^- ions. This is why an aqueous solution of KCl is neutral with a pH of almost 7.