The value of the ‘spin only’ magnetic moment for one of the following configurations is 2.84 BM. The correct one is
Spin only magnetic moment = √(n(n+2)) B.M.
Where n = number of unpaired electron
Given, √(n(n+2)) = 2.84
n(n + 2) = 8.0656
n = 2
In an octahedral complex, for a d4 configuration in a strong field ligand, number of unpaired electrons = 2
The correct option is D.