Which offensive smelling compound is obtained when ethyl amine is heated with chloroform and alcoholic KOH,

Options

A. A cyanide
B. An isocyanide
C. A secondary amine
D. An acid

Answer

To solve the problem of identifying the offensive smelling compound obtained when ethyl amine is heated with chloroform and alcoholic KOH, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants in this reaction are ethyl amine (C2H5NH2), chloroform (CHCl3), and alcoholic KOH.

2. **Understand the Reaction Type**:
- The reaction between a primary amine (like ethyl amine) and chloroform in the presence of alcoholic KOH is known as the **carbylamine reaction**.

3. **Write the Reaction**:
- The carbylamine reaction can be summarized as follows:
\[ \text{RNH}_2 + \text{CHCl}_3 + \text{3KOH} \rightarrow \text{RNC} + \text{3KCl} + \text{3H}_2\text{O} \]
- In this case, R is the ethyl group (C2H5), so the reaction becomes:
\[ \text{C}_2\text{H}_5\text{NH}_2 + \text{CHCl}_3 + \text{3KOH} \rightarrow \text{C}_2\text{H}_5\text{NC} + \text{3KCl} + \text{3H}_2\text{O} \]

4. **Identify the Product**:
- The product formed from this reaction is **ethyl isocyanide (C2H5NC)**.

5. **Characterize the Product**:
- Ethyl isocyanide is known for its offensive smell, which is characteristic of isocyanides.

6. **Conclusion**:
- Therefore, the offensive smelling compound obtained when ethyl amine is heated with chloroform and alcoholic KOH is **ethyl isocyanide**.

### Final Answer:
The offensive smelling compound obtained is **ethyl isocyanide (C2H5NC)**.

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