How can the following conversions be brought about :
Aniline to benzene.

Explanation

To convert aniline to benzene, we can follow these steps:

### Step 1: Formation of Benzene Diazonium Chloride
1. **React Aniline with Sodium Nitrite and Hydrochloric Acid**:
- Aniline (C6H5NH2) is treated with sodium nitrite (NaNO2) and hydrochloric acid (HCl) at a low temperature (0 to 5 degrees Celsius).
- This reaction leads to the formation of benzene diazonium chloride (C6H5N2Cl).

**Reaction**:
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