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In the process of extraction of gold. Roasted gold ore `+CN^(-)+H_(2)O overset(O_(2))rarr [X]+OH^(-)` `[X]+Znrarr [Y]+Au` Identify the complexes `[X] ` and `[Y]`.A. `Au(CN)_(2)]^(-), [Zn(CN)_(4)]^(2-)`B. `[Au(CN)_(4)]^(3-), [Zn(CN)_(4)]^(2-)`C. `[Au(CN)_(2)]^(2-), [Zn(CN)_(6)]^(4-)`D. `[Au(CN)_(4)]^(-), [Zn(CN)_(4)]^(2-)`

Answer» Correct Answer - A
`overset(-)(CN)(aq) + H_(2)O overset(o_(2))rarr[X] +[OH^(-)]`
`[X]+Znrarr[Y]+Au`
Identify the complexes [X]and[Y].


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