The byproduct in the extraction of iron is

In the metallurgy of aluminium,cryolite is mixed in the molten state because it

What is blister copper?

During the electrolytic reduction of alumina,two auxiliary electrolytes $X$ and $Y$ are added to increase the electrical conductance and lower the melting point of the mixture. $X$ and $Y$ are:

In the equation,$4M + 8CN^{-} + 2H_2O + O_2 \to 4[M(CN)_2]^- + 4OH^{-}$,the metal $M$ is

Which methods are used for the extraction of $Pb$ and $Sn$ from their respective ores?