Which of the following compound gives a product with foul smell
when reacted with chloroform in presence of a alkali ?

Options

A. `(CH_(3))_(2)NH`
B. `CH_(3)NH_(2)`
C. `H_(3)C-overset(CH_(3))overset(|)(N)-CH_(3)`
D. None of these

Answer

To solve the question of which compound gives a product with a foul smell when reacted with chloroform in the presence of an alkali, we can follow these steps:

### Step 1: Understand the Reaction
The reaction in question is known as the carbylamine reaction. This reaction occurs when primary amines react with chloroform (CHCl3) in the presence of a strong base (like KOH). The product formed in this reaction is an isocyanide (or carbylamine), which is known for its foul smell.

### Step 2: Identify the Type of Amines
The carbylamine reaction is specific to primary amines (1° amines). Secondary amines (2° amines) and tertiary amines (3° amines) do not undergo this reaction. Therefore, we need to ensure that the compound we are examining is a primary amine.

### Step 3: Write the General Reaction
The general reaction can be represented as follows:
\[ RNH_2 + CHCl_3 + 3KOH \rightarrow RNC + 3KCl + 3H_2O \]
Where:
- \( RNH_2 \) is the primary amine,
- \( CHCl_3 \) is chloroform,
- \( RNC \) is the isocyanide produced.

### Step 4: Analyze the Given Options
We need to look at the options provided in the question and identify which one is a primary amine. The options might include various amines, and we need to check if they are primary.

### Step 5: Determine the Correct Answer
Once we identify the primary amine from the options, we can conclude that it will produce an isocyanide when reacted with chloroform and alkali, resulting in a foul smell.

### Conclusion
The answer to the question is the primary amine that produces a foul-smelling isocyanide when reacted with chloroform in the presence of an alkali.