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Organic Chemistry: Some Basic Principles and Techniques — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryOrganic Chemistry: Some Basic Principles and Techniques1 Mark
Question
Lassaigne's test is not shown by diazonium salts, though they contain nitrogen. Why?
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Answer

Diazonium salts $(\text{C}_{6}\text{H}_{5}\text{N}^{+}_{2}\text{X}^{-})$ readily lose N2 on heating before reacting with fused sodium metal. Therefore, these do not give positive Lassaigne's test for nitrogen.

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