AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(C) Less than 7
Salts of a strong acid and a weak base are acidic in nature, with pH value less than 7.
Source: More About Salts, Section 2.4.2
The textbook directly states: "salts of a strong acid and weak base are acidic with pH value less than 7." Examples include ammonium chloride (strong acid HCl + weak base NH₄OH) and zinc sulphate. Examiners expect students to recall this rule for all three combinations: strong acid + strong base → pH 7; strong acid + weak base → pH < 7; weak acid + strong base → pH > 7.