Poling process is used for: — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

Step 1: Poling is a refining method where impure molten metal is stirred with green logs of wood. Step 2: The hydrocarbon gases (like methane) liberated from the green wood reduce any metal oxide impurities back to the metal. Step 3: In copper refining, this process selectively reduces cuprous oxide (Cu2O) back to copper: 2Cu2O + CH4 -> 4Cu + CO2 + 2H2O. Thus, the correct option is (a).