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8. Which compound does not give a positive result in the Lassaigne`s test for nitrogen? a. Aniline b. Glycerine c. Benzamide d. Urea |
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Answer» In Lassaigne's test, the ORGANIC compound is fused with sodium. Carbon and nitrogen present in the organic compound gives sodium CYANIDE (NACN). This is further used in the test for nitrogen. Hydrazine (H2 N−NH2 )do not contain carbon. It cannot form NaCN on fusion with sodium. Hence, hydrazine cannot give Lassaigne's test for nitrogen. |
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