Aluminium metal is purified by : — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

Step 1: Baeyer's, Hall's, and Serpeck's processes are used for the concentration of bauxite (obtaining pure alumina from the ore). Step 2: The refining (purification) of crude aluminium metal to 99.99% purity is performed electrolytically using Hoopes' process. Step 3: Thus, aluminium metal is purified by Hoope's process, which corresponds to option (a).