1.

When CuSO_(4) is treated with excess of aq. KCN solution, the species formed is

Answer»

`[Cu(CN)_(4)]^(2-)`
`[Cu(CN)_(4)]^(3-)`
`Cu(CN)_(2)`
`Cu_(2)(CN)_(2)`

Solution :`2CuSO_(4)+10KCNrarr2K_(3)[Cu(CN)_(4)]+(CN)_(2)+2K_(2)SO_(4)`


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