1.

In the process of extraction of gold, Roasted gold ore +CN^(-)+H_(2)O overset(O_(2)) to [X] +OH^(-) [X] +Zn to [Y] +Au Identify the complexes [X] and [Y]

Answer»

`X=[AU(CN)_(2)]^(-), Y=[Zn (CN)_(4)]^(2-)`
`X=[Au(CN)_(4)]^(3-), Y=[Zn (CN)_(4)]^(2-)`
`X=[Au(CN)_(2)]^(-), Y=[Zn (CN)_(4)]^(4-)`
`X=[Au(CN)_(4)]^(-), Y=[Zn (CN)_(4)]^(-)`

ANSWER :A


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