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Q.

Cyanide process is used for the extraction of

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a

Au

b

Cu

c

Zn

d

Fe

answer is A.

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Detailed Solution

Gold is leached by cyanide solution. Cyanide process is used in the extraction of both silver and gold because these form complex salts with CN ion due to presence of lone pair of electrons on nitrogen atom.

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Cyanide process is used for the extraction of