Question

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

Options

• \[\ce{NH2CONHNH2 * HCl}\]

• \[\ce{NH2NH2*HCl}\]

• \[\ce{NH2CONH2}\]

• \[\ce{C6H5NHNH2 * HCl}\]

Answer 1

Lassaigne's test for the detection of nitrogen fails in \[\underline{\ce{NH2NH2*HCl}}\].

Explanation:

For Lassaigne's test nitrogen compound must contain N in addition to carbon. So that NaCN can be formed in sodium extract.