Extraction of gold(Au) involves the form...

Extraction of gold(Au) involves the formation of complex ions'X' and 'Y'.
Gold ore `underset(CN^(-) , H_(2)O, O_(2))to HO^(-) + 'X' overset(Zn) to 'Y' + Au` X and Y are respectively ________.

A

distillation

B

zone refining

C

displacement with Zn

D

Liquation

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The correct Answer is:

C

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