1.

The coordination number, EAN of the central metal atom and geometry of the complex ion obtained by adding CuSO_4 to excess of aqueous KCN are respectively.

Answer»

`4, 35 , sp^2 d `
`6,36, sp^3 d^2`
`4,36 , sp^2 d`
`4,35, sp^3`

Solution :`CuSO_4 + 2KCN to Cu(CN)_2 + K_2 SO_4`,
`2Cu(CN)_2 to Cu_2 (CN)_2 + (CN)_2`
`Cu_2 (CN)_2 + 6KCN to K_3[Cu(CN)_4],`
`O.N. ` of Cu= +1
`Cu^(2+) (29) =(AR)3d^(10)`


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