The cupellation process is an important pyrometallurgical refining technique. Under which of the fol — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

Cupellation is used when the impure metal contains impurities that oxidize more readily than the metal itself. A classic example is the purification of silver containing lead impurity; the lead is oxidized to volatile $PbO$ (litharge) and blown away by a blast of air.