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Which of the following nitrogen containing compound does not give Lassaigne’s test ? 

(1) Phenyl hydrazine 

(2) Glycene 

(3) Urea

(4) Hydrazine

1 Answer

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Correct option is (4) Hydrazine

Hydrazine \((NH_2-NH_2)\) have no carbon so does not show Lassaigne’s test.

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