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:

विकल्प

• 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). Ammonium chloride (B) is acidic as it combines a weak base (NH₃) and a strong acid (HCl).
• Potassium nitrate (A) is neutral (pH ~ 7). Potassium nitrate (A) is a neutral compound created by combining strong acids (HNO) and bases (KOH).
• Sodium carbonate (C) is basic (pH > 7). Sodium carbonate (C) is a basic compound composed of NaOH, a strong base, and H₂CO₃, a weak acid.