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(A) In the cyanide process (MacArthur-Forrest process) for the extraction of silver $(Ag)$,the ore is treated with a dilute solution of sodium cyanide

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Convert silver into a soluble silver complex

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(A) In the cyanide process (MacArthur-Forrest process) for the extraction of silver $(Ag)$,the ore is treated with a dilute solution of sodium cyanide $(NaCN)$ in the presence of air $(O_2)$.$4Ag(s) + 8CN^-(aq) + 2H_2O(aq) + O_2(g) \rightarrow 4[Ag(CN)_2]^-(aq) + 4OH^-(aq)$.Here,silver is oxidized and converted into a soluble dicyanoargentate$(I)$ complex,$[Ag(CN)_2]^-$,which allows it to be separated from the ore.

In the cyanide process for the extraction of silver,sodium cyanide $(NaCN)$ is used to

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