JEE Mains · Chemistry · STD 12 - 5. Co-ordination chemistry
Total number of unpaired electrons in the complex ion \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}\) and \(\left[\mathrm{NiCl}_4\right]^{2-}\) is _______.
- A \(5\)
- B \(3\)
- C \(1\)
- D \(2\)
Answer & Solution
Correct Answer
(D) \(2\)
Step-by-step Solution
Detailed explanation
\(\mathrm{Co}^{+3}: 3 d^6 \quad t_{2 g}^{2,2,2} e_g^{0,0}\) \(\text { Unpaired } e^{-}=0\) \(\mathrm{Ni}^{+2}: 3 d^8 \quad e^{2,2} t_2^{2,1,1}\) \(\text { Unpaired } e^{-}=2\)
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