1.

In the following complexes : (P) NiSO_(4)+KCN(Xs) to complex 'I' (Q) FeCl_(3)+KCN(Xs) to complex 'II' (R )FeSO_(4)+KCN(Xs) to complex 'III' (S) CuSO_(4)+KCN(Xs) to Complex 'IV' Correct order of stability of complexes is :

Answer»

`PgtQgtRgtS`
`QgtPgtRgtS`
`QgtRgtPgtS`
`RgtQgtPgtS`

Solution :`P to K_(2)[Ni(CN)_(4)](dsp^(2))`(MAXIMUM CFSE)
`underset(R to K_(4)[overset(+2)(Fe)(CN)_(6)]d^(2)SP^(3)`
S to `K_(3) [Cu(CN)_(4)]sp^(3)` (Also, lower O.Sgt of C.A.)


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