Which of the following metals is commercially reduced by the carbon reduction method and refined by the distillation method?

In which furnace is pig iron produced? State its impurities.

Explain the electrolytic reduction of alumina.

Which reaction from the following occurs at $2000 \ K$ in the blast furnace for the extraction of iron?

The purpose of smelting of an ore is

During the extraction of gold,the following reactions take place: $4Au + 8CN^{-} + 2H_2O + O_2 \longrightarrow 4[Au(CN)_2]^{-} + 4OH^{-}$ and $2[Au(CN)_2]^{-} + Zn \longrightarrow [Zn(CN)_4]^{2-} + 2Au$. $X$ and $Y$ are respectively: