The method of zone refining of metals is based on the principle of : — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

Step 1: Oxygen and Silicon are the most abundant elements, but they are classified as a non-metal and metalloid respectively. Step 2: Among the metallic elements in the Earth's crust, Aluminium (Al) has the highest mass percentage (~8.1%). Step 3: Therefore, Aluminium is the most abundant metal, which corresponds to option (a).