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Lassaigne's test for the detection of nitrogen fails in

(a) $H_2N.CONHNH_2.HCl$ (b) $H_2NNH_2.HCl$ (c) $H_2NCONH_2$ (d) $C_6H_5NHNH_2.HCl$
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In the absence of carbon in the organic compound in Lassigne's test, NaCN is not formed as a product.


Answer: $H_2NNH_2.HCl$

As $H_2NHNH_2.HCl$ does not have any carbon, it does not respond to the Lassaigne's test.

answered Jan 24, 2014 by mosymeow_1
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