Question

Lassaigne's test for the detection of nitrogen fails in ______.

पर्याय

• NH₂CONHNH₂.HCI

• NH₂NH₂.НCІ

• NH₂CONH₂

• C₆H₅NHNH₂.HCI

Answer 1

Lassaigne's test for the detection of nitrogen fails in NH₂NH₂.НCІ.

Explanation: 

Lassaigne's test is given by only those compounds which contain both carbon and nitrogen. When compounds containing carbon and nitrogen are heated with sodium, it forms NaCN which is easily detected by FeCl₃.