TS EAMCET · Chemistry · Coordination Compounds
Identify the incorrect match from the following:
- A \(\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Br}_2-\) Paramagnetic
- B \(\mathrm{Na}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]\) - Diamagnetic
- C \(\left[\mathrm{Ni}(\mathrm{CO})_4\right]\) - Paramagnetic
- D \(\mathrm{Na}_2\left[\mathrm{NiCl}_4\right]\) - Paramagnetic
Answer & Solution
Correct Answer
(C) \(\left[\mathrm{Ni}(\mathrm{CO})_4\right]\) - Paramagnetic
Step-by-step Solution
Detailed explanation
\(\mathrm{Ni}\) in \(\left[\mathrm{Ni}(\mathrm{Co})_4\right]\) is in 0 oxidation state and \(\mathrm{Co}\) is a strong field ligand. Since there are no unpaired electrons, the complex is diamagnetic.
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