During qualitative analysis, an unknown amine reacts with cold and to form a distinct, heavy yellow — Amines Chemistry Question

💡 Solution & Explanation

Both aliphatic and aromatic secondary ($2^\circ$) amines lack the hydrogen atoms to form diazonium species. They react cleanly with nitrous acid to form characteristic, water-insoluble N-nitrosamines, which physically present as distinct yellow oily liquids.