1.

Which of the following complexes are not correctly matched with the hybridisation of their central metal ion ? (i) [Ni(CO)_(4)]sp^(3) (ii) [Ni(CN)_(4)]^(2-)sp^(3) (iii) [CoF_(6)]^(3-)d^(2)sp^(3) (iv) [CoF_(6)]^(3-)d^(2)sp^(3) Select the correct answer using the codes below :

Answer»

(i) and (II)
(i) and (iii)
(ii) and (iv)
(ii), (iii) and (iv)

Solution :`Ni(CO)_(4)=sp^(3), [Ni(CN)_(4)]^(2-)=DSP^(2)`,
`[CoF_(6)]^(3-)=sp^(3)d^(2),[Fe(CN)_(6)]^(3-)=d^(2)sp^(3)`.
[`Fe^(-)` is a WEAK ligand and cannot force d electrons to pair up FORMING outer orbital complex).


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