The compound which does not give foul smell when heated with `CHCl_(3)` and `KOH` is

Options

A. m-Toluidine
B. `CH_(3)-NH_(2)`
C. N-Methylaniline
D. `NH_(2)-CH_(2)-CH_(2)-OH`

Explanation

To solve the question, we need to identify which compound does not produce a foul smell when heated with CHCl3 (chloroform) and KOH (potassium hydroxide). This reaction is known as the Carbylamine reaction, which is specific to primary amines.

### Step-by-Step Solution:

1. **Understand the Carbylamine Reaction**:
- The Carbylamine reaction occurs when primary amines react with chloroform and a strong base (like KOH). This reaction produces isocyanides, which are known for their foul smell.

2. **Identify the Type of Amines**:
- Primary amines (1° amines) will give a positive result in the Carbylamine reaction, meaning they will produce a foul-smelling isocyanide.
- Secondary amines (2° amines) and tertiary amines (3° amines) do not undergo this reaction and therefore do not produce a foul smell.

3. **Analyze the Given Options**:
- We need to determine whether each of the given compounds is a primary, secondary, or tertiary amine:
- **Option A: Metatolidin (C7H9N)** - This is a primary amine (NH2 group attached to a carbon chain). It will give a foul smell.
- **Option B: Methylamine (CH3NH2)** - This is also a primary amine. It will give a foul smell.
- **Option C: N-Methyl Aniline (C7H9N)** - This is a secondary amine (the nitrogen is bonded to two carbons). It will NOT give a foul smell.
- **Option D: Aminoethanol (NH2CH2CH2OH)** - This is a primary amine. It will give a foul smell.

4. **Conclusion**:
- Among the options, N-Methyl Aniline (Option C) is the only compound that does not produce a foul smell when heated with CHCl3 and KOH because it is a secondary amine.

### Final Answer:
**Option C: N-Methyl Aniline does not give a foul smell when heated with CHCl3 and KOH.**

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