Which of the following metals are commercially extracted using the self-reduction (auto-reduction or — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

Self-reduction is applicable to less electropositive metals that form unstable sulphides. The primary metals extracted this way are Copper (from $Cu_2S$), Lead (from $PbS$), and Mercury (from $HgS$). Iron is extracted via carbon/smelting reduction in a blast furnace.