1.

Lassaigne's test for the detection of nitrogen will fail in the case of :

Answer»

`NH_(2)CONH_(2)`
`NH_(2)CONHNH_(2).HCl`
`NH_(2)NH_(2).HCl`
`C_(6)H_(5)NHNH_(2).2HCl`

SOLUTION :`NH_(2)-NH_(2)` (Inorganic compound give -ve Lassigne's test)


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