Lassaigne's test is not shown by diazonium salts. Why ?

Explanation

### Step-by-Step Solution:

1. **Understanding Lassaigne's Test**: Lassaigne's test is a qualitative analysis method used to detect the presence of certain elements (like nitrogen, sulfur, and halogens) in organic compounds. It involves fusing the organic compound with sodium metal and then treating the resulting sodium extract with specific reagents.

2. **Nature of Diazonium Salts**: Diazonium salts are organic compounds that contain a diazonium group (-N2^+). They are typically unstable and can decompose easily.

3. **Decomposition of Diazonium Salts**: When diazonium salts are heated, they tend to lose nitrogen gas (N2) rapidly. This decomposition occurs before they can react with the fused sodium metal during the Lassaigne's test.

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