During Lassaigne's test for nitrogen, a Prussian blue colour is observed. Which of the following com — Qualitative and Quantitative Analysis Chemistry Question

💡 Solution & Explanation

Lassaigne's test relies on fusing the compound with sodium to form $NaCN$. The compound must therefore contain both Carbon and Nitrogen. Hydrazine ($NH_2NH_2$) lacks carbon and cannot form the cyanide ion.