Refining of tin cannot be done by: — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

Step 1: Tin is a low-melting metal that can be refined by liquation, poling (to remove oxides), and electrorefining. Step 2: Cupellation is a refining process used to separate noble metals like silver or gold from base metal impurities (like lead) which easily oxidize. Step 3: Therefore, cupellation cannot be used for refining tin. Thus, the correct option is (a).