Which of the following test is used for the detection of secondary amines?

Options

A. Tollen’s test
B. Lucas test
C. Liebermann’s nitroso test
D. Carbylamine reaction

Answer

To determine which test is used for the detection of secondary amines, let's analyze the options provided step by step.

### Step 1: Understand the types of amines
Amines can be classified into three categories based on the number of carbon groups attached to the nitrogen atom:
- Primary amines (1°): One carbon group attached to nitrogen.
- Secondary amines (2°): Two carbon groups attached to nitrogen.
- Tertiary amines (3°): Three carbon groups attached to nitrogen.

### Step 2: Review the tests mentioned
1. **Tollens' Test**: This test is primarily used for the detection of aldehydes, not amines.
2. **Lucas Test**: This test is used for the classification of alcohols based on their reactivity, not specifically for amines.
3. **Carbylamine Reaction**: This test is used for primary amines to produce an isocyanide, so it does not apply to secondary amines.
4. **Leaformans Nitroso Test**: This test is specifically used for the detection of secondary amines. In this test, secondary amines react with nitrous acid (HNO2) to form nitrosoamines.

### Step 3: Identify the correct answer
From the analysis above, the test that is specifically used for the detection of secondary amines is the **Leaformans Nitroso Test**.

### Conclusion
The correct answer is the **Leaformans Nitroso Test** (option related to HNO2), which is applicable for secondary amines.

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