Which of the following compounds will NOT give a positive Lassaigne's test for nitrogen upon sodium fusion? | Practical Organic Chemistry and Purification — Chem-Mantra | Chem-Mantra

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Question

Which of the following compounds will NOT give a positive Lassaigne's test for nitrogen upon sodium fusion?

Answer: C

💡 Solution & Explanation

Lassaigne's test for nitrogen requires the formation of $NaCN$. Hydrazine ($NH_2NH_2$) lacks carbon, so it cannot form cyanide ions during fusion.

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