Sodium benzene sulphonate reacts with NaOH and then on acidic hydrolysis, it gives:

Options

A. Phenol
B. Benzoic acid
C. Benzene
D. Disodium benzaldehyde

Answer

To solve the problem of what sodium benzene sulfonate gives when it reacts with NaOH and undergoes acidic hydrolysis, we can break the solution down into clear steps:

### Step-by-Step Solution:

**Step 1: Identify the Reactants**
- The reactant is sodium benzene sulfonate (C6H5SO3Na).

**Step 2: Reaction with Sodium Hydroxide**
- Sodium benzene sulfonate reacts with sodium hydroxide (NaOH) when heated (typically at 573 K). This reaction is known as fusion.
- The reaction can be represented as follows:
\[ \text{C}_6\text{H}_5\text{SO}_3\text{Na} + \text{NaOH} \rightarrow \text{C}_6\text{H}_5\text{O}^- \text{Na}^+ + \text{Na}_2\text{SO}_3 + \text{H}_2\text{O} \]
- The product formed is sodium phenoxide (C6H5O^-Na^+) along with sodium sulfite (Na2SO3) and water (H2O).

**Step 3: Acidic Hydrolysis of Sodium Phenoxide**
- The next step is the acidic hydrolysis of sodium phenoxide. When sodium phenoxide is treated with an acid (like HCl), it yields phenol.
- The reaction can be represented as follows:
\[ \text{C}_6\text{H}_5\text{O}^- \text{Na}^+ + \text{H}^+ \rightarrow \text{C}_6\text{H}_5\text{OH} + \text{Na}^+ \]
- The products of this reaction are phenol (C6H5OH) and sodium ions.

**Step 4: Conclusion**
- The final product after the complete reaction of sodium benzene sulfonate with NaOH followed by acidic hydrolysis is phenol.

### Final Answer:
- The product is **phenol** (Option 1).