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Explain the following: (i) All the oc...

Explain the following:
(i) All the octahedral complexes of `Ni^(2+)` must be outer orbital complexes.
(ii) `[CoF_(6)]^(3-)` is paramgnetic but `[Co(CN)_(6)]^(3-)` is diamagnetic .

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
B
Both assertion and reason are true but reason is not the correct explanation of assertion.

During rearrangement only one 3d-orbital may be made available by pairing the electrons. Thus, inner d2sp3 hybridization is not possible, so, only `sp^3 d^2` (outer) hybridization can occur.
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