1.

During the extraction of gold the following reactions take place. Au + CN^(-) + H_(2)O overset (O_(2)) to [X] [X] + Zn rightarrow [Y] + Au X and Y are respectively.

Answer»

`[Au(CN)_(2)]^(-)` and `[Zn(CN)_(6)]^(4-)`
`[Au(CN)_(4)]^(2-)` and `[Zn(CN)_(4)]^(2-)`
`[Au(CN)_(4)]^(3-)` and `[Zn(CN)_(4)]^(2-)`
`[Au(CN)_(2)]^(-)` and `[Zn(CN)_(4)]^(2-)`

Solution :During the EXTRACTION of gold.
`Au + CN^(-) + H_(2)O (OVERSET(O_(2))) to [Au(CN)_(2)]^(-)`
`[Au (CN)_(2)]^(-) + Zn RIGHTARROW [Zn(CN)_(4)]^(2-) + Au`
Here `[X] = [Au(CN)_(2)]^(-)` and `[Y] = [Zn(CN)_(4)]^(2-)`


Discussion

No Comment Found

Related InterviewSolutions