What is the number of unpaired electrons present in $\left[\mathrm{CoF}_6\right]^{3-}$ ?

What is the number of unpaired electrons present in $\left[\mathrm{CoF}_6\right]^{3-}$ ?
  1. 4
  2. 3
  3. 2
  4. 1

Solution

Electronic configuration of $\mathrm{Co}^{3+}$ after formation of complex would be
There are 4 unpaired electrons in 3d orbitals.

Asked in: MHT CET 2024 (11 May Shift 1)

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