Consider the pyrometallurgical refining technique of "Poling." Which of the following scenarios spec — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

Poling is exclusively used when a metal is contaminated with its own oxide (e.g., Blister copper containing $Cu_2O$). Stirring the molten bath with green wood poles causes the wood to release hydrocarbon gases (like $CH_4$) due to the intense heat. These hydrocarbons act as reducing agents, converting the metal oxide back to pure metal.