Which one of the following tests can be used to identify primary
amino group in a given organic compound

Options

A. lodoform test
B. Victor Meyer's test
C. Carbylamine reaction
D. Libermann's reaction

Answer

To identify a primary amino group in a given organic compound, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a test that can specifically identify a primary amino group (NH2) in an organic compound.

2. **Reviewing the Tests**: We have four tests to consider:
- Iodoform Test
- Victor-Meyer Test
- Carbolamine Reaction
- Lieberman Reaction

3. **Analyzing the Iodoform Test**:
- The Iodoform test is used to identify compounds that have a methyl ketone (CH3CO) or a secondary alcohol (CH3CHOH).
- Since primary amines do not contain these functional groups, this test cannot be used to identify primary amino groups.

**Hint**: Iodoform test is not suitable for primary amines as it targets specific carbonyl and alcohol structures.

4. **Analyzing the Victor-Meyer Test**:
- The Victor-Meyer test is primarily used to distinguish between different types of alcohols (primary, secondary, and tertiary).
- It does not apply to amines, hence it cannot identify primary amino groups.

**Hint**: Victor-Meyer test is focused on alcohols, not amines.

5. **Analyzing the Carbolamine Reaction**:
- The Carbolamine reaction involves the reaction of primary amines with chloroform (CHCl3) and alcoholic potassium hydroxide (KOH).
- This reaction produces an isocyanide (R-N=C), which is a characteristic reaction for primary amines. Thus, this test can specifically identify primary amino groups.

**Hint**: Carbolamine reaction is unique to primary amines and produces a distinct product.

6. **Analyzing the Lieberman Reaction**:
- The Lieberman reaction is used to test for secondary amines. It does not apply to primary amines, making it an unsuitable choice for this question.

**Hint**: Lieberman reaction is specific for secondary amines, not primary.

7. **Conclusion**: Based on the analysis, the test that can be used to identify a primary amino group is the **Carbolamine Reaction**.

### Final Answer:
The test that can be used to identify a primary amino group in a given organic compound is the **Carbolamine Reaction**.