In strongly acidic medium electrolytic reduction of nitrobenzene gives :

Options

A. Nitrobenzene
B. para-amino phenol
C. aniline
D. phenyl hydroxyl amine

Answer

To solve the problem of what nitrobenzene gives upon electrolytic reduction in a strongly acidic medium, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactant**:
- The starting compound is nitrobenzene (C6H5NO2).

2. **Understand the Reaction Conditions**:
- The reaction occurs in a strongly acidic medium, such as sulfuric acid (H2SO4). This environment is important for the reduction process.

3. **Electrolytic Reduction**:
- In the presence of strong acids, nitrobenzene undergoes electrolytic reduction. The nitro group (-NO2) is reduced to a hydroxylamine group (-NH2OH).

4. **Formation of Hydroxylamine**:
- The first product of the reduction is hydroxylamine (C6H5-NH2OH). This compound consists of a benzene ring with a hydroxylamine substituent.

5. **Rearrangement**:
- The hydroxylamine can undergo rearrangement. In this case, the hydroxyl group (-OH) migrates to the para position relative to the amino group (-NH2).

6. **Final Product**:
- The final product after rearrangement is para-amino-phenol (C6H4(OH)(NH2)), which has both an amino group and a hydroxyl group on the benzene ring.

### Conclusion:
- Therefore, the electrolytic reduction of nitrobenzene in a strongly acidic medium yields para-amino-phenol.