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:

पर्याय

• A < B < C

• B < C < A

• C < A < B

• B < A < C

Answer 1

B < A < C

Explanation:

• Ammonium Chloride: It is acidic (pH < 7) because it is a salt of a strong acid (HCl) and a weak base (NH₄OH).
• Potassium nitrate: It is neutral (pH ≈ 7) because it is formed from a strong acid (HNO₃) and a strong base (KOH).
• Sodium carbonate: It is basic (pH > 7) because it is a salt of a strong base (NaOH) and a weak acid (H₂CO₃).