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Among the following the total number of ...

Among the following the total number of compounds which give positive Lassaigne's test for nitrogen is/are ……….

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The correct Answer is:
`4`
`NH_(2)OH,H_(2)N-NH_(2)` does not contain C atom in it to form NaCN with sodium metal andhence will not show positive Lassaigne.s testfor nitrogen.
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