How do aromatic and aliphatic primary amines react with nitrous acid ?

Explanation

### Step-by-Step Solution:

1. **Understanding the Reactants**:
- Aromatic primary amines (e.g., aniline) and aliphatic primary amines (e.g., R-NH2) are the two types of amines we are considering.
- Nitrous acid (HNO2) is the reagent that will react with these amines.

2. **Reaction of Aromatic Primary Amines**:
- When an aromatic primary amine like aniline (C6H5NH2) reacts with nitrous acid (HNO2) in the presence of hydrochloric acid (HCl) at a temperature of 0 to 5 degrees Celsius, it forms a stable compound known as a diazonium salt.
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