During the preparation of Lassaigne's extract (sodium fusion extract), which of the following ionic — Practical Organic Chemistry and Purification Chemistry Question

💡 Solution & Explanation

Sodium fusion converts covalent elements into ionic salts. Carbon and nitrogen form $NaCN$ ($CN^-$). Sulphur forms $Na_2S$ ($S^{2-}$). If both nitrogen and sulphur are present (without excess Na), they form $NaSCN$ ($SCN^-$). Nitrate ($NO_3^-$) is not formed in this reductive fusion.