Chemistry - Metallurgy Question with Solution | TestHub

Option A is incorrect. During reduction of Zinc oxide, the oxide is heated with carbon (coke), not CO, at high temperature to produce metallic Zinc. The reaction is $ZnO(s)+C(s)\to Zn(s)+CO(g)$.

Option B is correct. This describes the Van Arkel method for refining Zirconium, where $Zr{I}_4$ decomposes on a hot tungsten filament.

Option C is incorrect. Collectors (like pine oil) enhance the non-wettability of mineral particles by water, making them float in froth flotation.

Option D is correct. Hydrometallurgy is used for low-grade copper ores, involving leaching with acid or bacteria, followed by solvent extraction and electrowinning.