Question

Which of the following salt undergoes anionic hydrolysis ?

• A. \(\text{CuSO}_4\)
• B. \(\text{Na}_2\text{CO}_3\)
• C. \(\text{NH}_4\text{Cl}\)
• D. \(\text{FeCl}_3\)

Hint:

Anionic hydrolysis happens for salts of a strong base and a weak acid.

Answer 1

The Correct Option is B

Step 1: Classify by parent acid and base
CuSO4: weak base plus strong acid. NH4Cl: weak base plus strong acid. FeCl3: weak base plus strong acid. Na2CO3: strong base plus weak acid.

Step 2: Conclude
The anion of a weak acid is a base, so it picks up a proton from water. This is anionic hydrolysis and is seen in Na2CO3 only, option (B).

Final Answer:
Na2CO3. \[ \boxed{\text{(B)}\ Na_2CO_3} \]