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In the process of extraction of gold, Roasted gold ore `+CN^(-)+H_2Ooverset(o_2)rarr[X]+OH^(-)` `[X]+Znrarr[Y]+Au` Identify the complexes [X] and [Y]A. `X =[Au(CN)_(2)]^(Ө), Y = [Zn(CN)_(4)]^(2-)`B. `X =[Au(CN)_(2)]^(3-), Y =[Zn(CN)_(4)]^(2-)`C. `X =[Au(CN)_(2)]^(Ө), Y =[Zn(CN)_(6)]^(4-)`D. `X =[Au(CN)_(4)]^(Ө), Y [Zn(CN)_(4)]^(2-)` |
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Answer» Correct Answer - A `Au + 4CN^(Ө) +H_(2)O + 1//2O_(2) rarr 2[Au(CN)_(2)]^(Ө) + 2O^(Ө)H` `2[Au(CN)_(2)]^(Ө) + Zn rarr [Zn(CN)_(4)]^(2-) + 2 Au`. |
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