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Lassaigne's test for the detection of ni...

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

A

`NH_2CONH_2`

B

`H_2NCONHNH_2`. HCI

C

`H_2N . NH_2` .HCI

D

`C_6H_5NHNH_2` .HCI

Text Solution

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The correct Answer is:
C
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