Chemistry - Metallurgy Question with Solution | TestHub

Silver is extracted from Ag₂S (argentite) by the cyanide process, where it is leached with NaCN solution in the presence of air to form dicyanidoargentate(I), $[Ag(CN{)}_2{]}^{-}$. Silver is then displaced from this complex by zinc (Zn). Self-reduction is not used for the industrial extraction of silver; it is mainly used for copper extraction. Cupellation is used to refine silver by removing lead as PbO (litharge).

Therefore, the correct statements are A, B and D.