Write the chmical reaction occurring in the preparation of fluorobenzene from aniline.

Explanation

To prepare fluorobenzene from aniline, we can follow these steps:

### Step-by-Step Solution:

1. **Starting Material**: Identify the starting material, which is aniline (C6H5NH2).

2. **Formation of Diazonium Salt**: Treat aniline with sodium nitrite (NaNO2) and hydrochloric acid (HCl) at a low temperature (0 to 5 °C). This reaction forms benzene diazonium chloride (C6H5N2Cl).
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