Write the reaction of
(i) aromatic and
(ii) aliphatic primary amines with nitrous acid.

Explanation

To write the reactions of aromatic and aliphatic primary amines with nitrous acid, we will consider the following steps:

### Step 1: Understanding the Reactants
- **Aromatic Primary Amines**: These are amines where the amino group (-NH2) is directly attached to an aromatic ring.
- **Aliphatic Primary Amines**: These are amines where the amino group is attached to a carbon chain that is not aromatic.

### Step 2: Reaction of Aromatic Primary Amines with Nitrous Acid
1. **Formation of Nitrous Acid**: Nitrous acid (HNO2) can be generated in situ by mixing sodium nitrite (NaNO2) with hydrochloric acid (HCl).
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