Question:

Lassaigne?? test for the detection of nitrogen fails in

Updated On: Jun 23, 2023
  • $H_2N - CO - NHNH_2 \cdot HCl$
  • $NH_2 - NH_2 \cdot HCl$
  • $C_6H_5 NH - NH_2 \cdot HCl$
  • $C_6H_5CONH_2$
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The Correct Option is B

Solution and Explanation

Lassaigne?? test is given by those nitrogenous compounds in which carbon is also present along with nitrogen. In $ {NH2 ??NH2.HCl,}$ carbon is absent, so it does not give Lassaigne?? test
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