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5. Co-ordination chemistry — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry5. Co-ordination chemistry1 Mark
MCQ
Select the option with correct property -
  • A
    $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ and $\left[\mathrm{NiCl}_4\right]^{2-}$ both diamagnetic
  • B
    $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ and $\left[\mathrm{NiCl}_4\right]^{2-}$ both paramagnetic
  • C
    $\left[\mathrm{NiCl}_4\right]^{2-}$ diamagnetic, $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ paramagnetic
  • ✓
    $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ diamagnetic, $\left[\mathrm{NiCl}_4\right]^{2-}$
✓

Answer

Correct option: D.
$\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ diamagnetic, $\left[\mathrm{NiCl}_4\right]^{2-}$
d
$\left[\mathrm{Ni}(\mathrm{CO})_4\right] \rightarrow$ diamagnetic, $\mathrm{sp}^3$ hybridisation, number of unpaired electrons $=0$

$\left[\mathrm{NiCl}_4\right]^{2-}, \rightarrow$ paramagnetic, $\mathrm{sp}^3$ hybridisation, number of unpaired electrons $=2$

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