Question

$pH$ of water is 7 when any substance $Y$ is dissolved in water then $pH$ becomes $13$ .Substance $Y$ is a salt of:

• A. strong acid and strong base
• B. strong acid and weak base
• C. weak acid and weak base
• D. weak acid and strong base

Answer 1

The correct option is D weak acid and strong base

Solution:- (D) weak acid and strong base

As the pH of the solution after dissolving $Y$ increases, i.e., the solution becomes more basic.

Thus the substance $Y$ is a salt of a strong base and weak acid.