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Which of the following compounds dues not show lassaigne's test for nitrogen ?

(a) Urea

(b) Hydrazine

(c) Phenylhydrazine

(d) Azobenzene

2 Answers

Hydrazine $(NH_2NH_2)$ does not contain and hence no fusion with Na metal , it cannot form $NaCN$ .
Therefore , hydrazine does not show lassaigne's test,
Hence b is the correct answer.
answered Mar 3, 2014 by meena.p
 
c option must be the corrrect answer
answered Nov 26, 2016 by smkjain48
 

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