Question

A salt whose aqueous solution will have a pH of more than 7 will be ______.

Options

• K₂CO₃

• K₂SO₄

• NaCl

• NH₄Cl

Answer 1

A salt whose aqueous solution will have a pH of more than 7 will be K₂CO₃.

Explanation:

A pH of more than 7 indicates that the aqueous solution is basic or alkaline. Potassium carbonate (K₂CO₃) is a basic salt formed from a strong base (KOH) and a weak acid (H₂CO₃). When dissolved in water, carbonate ions undergo anionic hydrolysis, releasing excess hydroxide ions (OH⁻), thereby raising the pH above 7.