STANDARDChemistry-Organic Chemistry
STANDARD Chemistry Qualitative Analysis MCQ Question
Type: MCQ-conceptual-Medium
Lassaigne's test for the detection of nitrogen fails in
A
NH₂CONHNH₂·HCl
B
NH₂NH₂·HCl
C
NH₂CONH₂
D
C₆H₅NHNH₂·HCl
Correct Answer
Option B
Detailed Explanation
For positive Lassaigne's test, nitrogen should be attached to a carbon atom. In the absence of carbon in the organic compound, NaCN is not formed as a product. NH₂NH₂·HCl does not have any carbon, so it does not respond to the Lassaigne's test.
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