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(D) The extraction of $Ag$ (Silver) from its ore (like $Ag_2S$) involves leaching the finely powdered ore with a dilute solution of $KCN$ in the prese

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Silver

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(D) The extraction of $Ag$ (Silver) from its ore (like $Ag_2S$) involves leaching the finely powdered ore with a dilute solution of $KCN$ in the presence of air $(O_2)$.The chemical reaction is: $4Ag(s) + 8CN^-(aq) + 2H_2O(aq) + O_2(g) \rightarrow 4[Ag(CN)_2]^-(aq) + 4OH^-(aq)$.The soluble complex formed is potassium argentocyanide,$K[Ag(CN)_2]$.Thus,the element being extracted is Silver $(Ag)$.

While extracting an element from its ore,the ore is ground and leached with dilute $KCN$ solution to form the soluble product potassium argentocyanide. The element is

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