The Beilstein test is a preliminary flame test for halogens, yielding a green/blue flame due to vola — Practical Organic Chemistry and Purification Chemistry Question

💡 Solution & Explanation

The Beilstein test confirms the presence of halogens but cannot distinguish between Cl, Br, or I. It does not detect fluorine because copper fluoride is not volatile. It is purely qualitative. Furthermore, non-halogen compounds like urea and thiourea form volatile cuprous cyanide, giving a false positive green flame.