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AP EAMCET · Chemistry · Coordination Compounds

Which of the following statements are correct?
i. \(\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-},\left[\mathrm{MnCl}_6\right]^{3-}\) both are paramagnetic
ii. Both \(\left[\mathrm{NiCl}_4\right]^{2-},\left[\mathrm{Ni}(\mathrm{CO})_4\right]\) are tetrahedral and diamagnetic
iii. \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}\) is inner orbital complex, but \(\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+}\) is outer orbital complex

  1. A i, ii only
  2. B i, iii only
  3. C ii, iii only
  4. D i, ii, iii
Verified Solution

Answer & Solution

Correct Answer

(B) i, iii only

Step-by-step Solution

Detailed explanation

\(\left[\mathrm{NiCl}_4\right]^{2-}\) has \(\mathrm{Ni}^{2+}\) that has the configuration \([\mathrm{Ar}] 3 \mathrm{~d}^8\). Since \(\mathrm{Cl}^{-}\)is a weak-field ligand, the configuration of the complex will be:- \(\left[\mathrm{NiCl}_4\right]^{2-}=\) Thus, it is a…