Question

Among the following correct statements are:
(I) ${\left[MnC{l}_6\right]}^3,{\left[Fe{F}_6\right]}^{3-}$ are paramagnetic having four and five unpaired electrons respectively.
(II) Valence bond theory gives a quantitative interpretation of the thermodynamic stabilities of coordination compounds.
(III) The crystal field splitting ${\Delta }_0$, depends upon the field produced by the ligand and charge on the metal ion.

• A. I, II
• B. I, III
• C. I, II, III
• D. II, III

Answer 1

Answer: (B)

(I) As all are weak field ligands therefore they have four and five number of unpaired electrons as in central metal ion.

(II) $V.B.T.$ does not give any interpretation about the relative thermodynamic stabilities of various complexes. This is one of the limitation of $V.B.T.$

(III) Is correct statement.