A compound which does not give a positive result in the Lassaigne's test for nitrogen is:

urea

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hydroxyl amine

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glycine

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phenylhydrazine

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Solution

The correct option is A hydroxyl amine
Lassaigne's test is not given by compounds which do not contain C atoms.

As the atoms do not contain C atoms, so in sodium fusion extract $C N^{-}$ is not formed and prussian blue colour is not deserved.
Hydroxylamine $= N H_{2} - O H$
Urea $= N H_{2} - C O - N H_{2}$
Glycine $= C_{_{2}} H_{5} N O_{2}$
Phenylhydrazine $= P h - N H - N H_{2}$

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