Question

You have three aqueous solutions A, B and C as given below:

1. Potassium nitrate
2. Ammonium chloride
3. Sodium carbonate

The ascending order of the pH of these solutions is:

Options

• A < B < C

• B < C < A

• C < A < B

• B < A < C

Answer 1

B < A < C

Explanation:

• Ammonium chloride (B) is acidic (pH < 7).
• Potassium nitrate (A) is neutral (pH ~ 7). 
• Sodium carbonate (C) is basic (pH > 7).