For octahedral Mn II and tetrahedral Ni II complexes, consider the following statements : ( I ) both the…

For octahedral MnII and tetrahedral NiII complexes, consider the following statements :

(I) both the complexes can be high spin.

(II) NiII complex can very rarely be of low spin.

(III) with strong field ligands, MnII complexes can be low spin.

(IV) aqueous solution of MnII ions is yellow in color.

The correct statements are :

  1. (I) and (II) only
  2. I, II and IV only
  3. I, II and III only 
  4. II, III and IV only

Solution

With weak field ligands Mn(II) will be of high spin and with strong field ligands it will be of low spin. Ni(II) tetrahedral complexes will be genrally of high spin due to sp3 hybridisation. It can very rarely be of low spin when ligand field is very strong.

Mn(II) is of light pink color in aqueous solution.

Asked in: JEE Main 2020 (02 Sep Shift 1)

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