Medium MCQ +4 / -1 PYQ · JEE Mains 2024

Select the option with correct property -

  1. A $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ and $\left[\mathrm{NiCl}_4\right]^{2-}$ both Paramagnetic
  2. B $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ and $\left[\mathrm{NiCl}_4\right]^{2-}$ both Diamagnetic
  3. C $\left[\mathrm{NiCl}_4\right]^{2-}$ Diamagnetic, $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ Paramagnetic
  4. D $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ Diamagnetic, $\left[\mathrm{NiCl}_4\right]^{2-}$ Paramagnetic Correct answer

Solution

<p>$\left[\mathrm{Ni}(\mathrm{CO})_4\right] \rightarrow$ diamagnetic, $\mathrm{sp}^3$ hybridisation, number of unpaired electrons $=0$</p> <p>$\left[\mathrm{NiCl}_4\right]^{2-}, \rightarrow$ paramagnetic, $\mathrm{sp}^3$ hybridisation, number of unpaired electrons $=2$</p>

About this question

Subject: Chemistry · Chapter: Coordination Compounds · Topic: Ligands and Coordination Number

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