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Lassaigns test is not shown by diazonium salt because |
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Answer» Diazonium salts are stable only at LOW temperatures (0-50 C). At higher temperatures, they decompose to give nitrogen. In Lassaigne's test, the organic compound is converted from covalent form to ionic form by fusing it with sodium metal. THUS, the diazonium salt will decompose and lose nitrogen MUCH before being fused with sodium metal. If nitrogen is lost, then NaCN will not be formed and HENCE the compound will not give positive test for nitrogen. |
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