1.

Which of the following compounds will not give Lassaigne's test for nitrogen ?

Answer»

`NH_(2)NH_(2)`
`C_(6)H_(5)NHNH_(2)`
`PhN = NPh`
`NH_(2)CONH_(2)`

Solution :`NH_(2)NH_(2)` does not have carbon to form NaCN needed for +ve Lassaigne's test.


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