Extraction of Crude Metal from Concentrated Ore — Prelims Questions

Which of the following processes involves heating a concentrated ore in the presence of excess air to convert it into its oxide form?

Which of the following reactions correctly represents the role of an acidic flux in removing basic gangue?

Which of the following metals is typically extracted by electrolytic reduction of its fused salt?

In the extraction of copper from copper glance ($Cu_2S$), which of the following represents the self-reduction step?

Which of the following statements is INCORRECT regarding the extraction of crude metal from concentrated ore?

What is the primary purpose of adding limestone ($CaCO_3$) as a flux in the blast furnace during iron extraction?