JEE Main 20248 AprilEvening Shift
- Exam
- JEE Main
- Year
- 2024
- Date
- 8 April
- Shift
- Evening Shift
- Subject
- Chemistry
- Chapter
- Coordination Compounds
JEE Main 2024 · 8 April · Evening Shift · Chemistry · Coordination Compounds
Total number of unpaired electrons in the complex ions...
Total number of unpaired electrons in the complex ions (\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}) and (\left[\mathrm{NiCl}_4\right]^{2-}) is (\qquad)
Correct answer
2
Step-by-step solution
\begin{aligned} & \mathrm{Co}^{+3}: 3 \mathrm{ d}^6 \quad \mathrm{t}_{2 \mathrm{ g}^{2,2,2} \mathrm{e}_{\mathrm{g}^{0,0} \\ & \text{ Unpaired e } \mathrm{e}^{-}=0 \\ & \mathrm{Ni}^{+2}: 3 \mathrm{ d}^8 \quad \mathrm{e}^{2,2} \mathrm{t}_2^{2,1,1} \\ & \text{ Unpaired } \mathrm{e}^{-}=2\end{aligned}