1.

Roasted gold ore +CN^(-)+H_(2)O overset(O_(2)) to [x]+OH, [x]+Zn to [y]+Au[x] and |y| are

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)_(6)]^(-4)`
`x=[Au(CN)_(4)]^(-3) "" y=[Zn(CN)_(6)]^(-2)`

SOLUTION :`Au_(2)S+4NaCN hArr UNDERSET((x))(2NA[Au(CN)_(2)])+Na_(2)S`
`2Na[Au(CN)_(2)]^(-)+Zn to Na_(2)[Zn(CN)_(4)]+2Au`
`X=[Au(CN)_(2)]^(-) and Y=[Zn(CN)_(4)]^(-2)`


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