Lassigne's test in not shown by diazonium salts and hydrazines `(NH_2NH_2)`. Why?

Explanation

To understand why Lassigne's test is not shown by diazonium salts and hydrazines, we need to break down the reasoning into clear steps.

### Step-by-Step Solution:

1. **Understanding Lassigne's Test**:
Lassigne's test is a qualitative test used to detect the presence of nitrogen in organic compounds. The test involves the fusion of the organic compound with sodium, which leads to the formation of sodium chloride (NaCl) if nitrogen is present.

2. **Diazonium Salts Composition**:
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