1.

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].

Answer»

` [AU(CN)_(2)]^(-) , [ZN (CN)_(4)]^(2-)`
`[Au(CN)_(4)]^(3-) , [Zn(CN)_(4)]^(2-)`
`[Au(CN)_(2)]^(2-) , [Zn(CN)_(6)]^(4-)`
`[Au(CN)_(4)]^(-) . [Zn(CN)_(4)]^(2-)`

Answer :A


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