Question

Which of the following salts on being dissolved in water gives $pH>7$ at $25^{\circ }C$ ?

• A. $KCN$
• B. $KN{O}_3$
• C. $N{H}_{4}Cl$
• D. $N{H}_{4}CN$

Answer 1

Answer: (A)

$KCN$ is a salt of weak acid and strong base hence, on bcing dissolved in water it gives basic solution $i.e.$ $pH>7$ at $25^{\circ }C$