How many of the following amines will undergo diazotisation tert-Butylamine, ethanamine, aniline, N-methylaniline,p-toluidine,m-chloroaniline,2-phenylethanamine,o-anisidine,2,4,6-tribromoaniline

Explanation

To determine how many of the given amines will undergo diazotization, we need to identify which of them are primary aromatic amines. Diazotization is a reaction that occurs primarily with primary aromatic amines.

### Step-by-Step Solution:

1. **Identify the Types of Amines**:
- **Tertiary Butylamine**: This is a tertiary amine (R3N) and does not undergo diazotization.
- **Ethanamine**: This is a primary amine (RNH2) but it is aliphatic, not aromatic, so it does not undergo diazotization.
- **Aniline**: This is a primary aromatic amine (C6H5NH2) and will undergo diazotization.
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