Chemistry - Metallurgy Question with Solution | TestHub

In the cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents used are${\mathrm{O}}_2$and Zn dust respectively.
${\text{Ag}}_2\text{S}+2{\text{CN}}^{-}+{\text{O}}_2\to 2{\left[\text{Ag}{(\text{CN})}_2\right]}^{-}+{\text{SO}}_2$
$2{\left[\text{Ag}{(\text{CN})}_2\right]}^{-}+\text{Zn}\to {\left[\text{Zn}{(\text{CN})}_4\right]}^{2-}+2\text{Ag}$