State the equations for the preparation of the following compounds . (Equations need not to be balance).
(i) Chlorobenzene from aniline (in two steps )
(ii) N-Propyl amine from ethyl chloride (in two steps )

Explanation

To prepare the specified compounds, we will outline the step-by-step reactions for each case.

### (i) Preparation of Chlorobenzene from Aniline (in two steps)

**Step 1: Diazotization of Aniline**
- Aniline (C6H5NH2) reacts with sodium nitrite (NaNO2) in the presence of hydrochloric acid (HCl) at low temperatures (0-5°C) to form benzene diazonium chloride (C6H5N2Cl).

**Equation:**
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