| (I) \[{{\left[ MnC{{l}_{6}} \right]}^{3-}},\,{{\left[ Fe{{F}_{6}} \right]}^{3-}}\] and \[{{\left[ Co{{F}_{6}} \right]}^{3-}}\] are paramagnetic having four, five and four unpaired electrons respectively. |
| (II) Valence bond theory gives a quantitative interpretation of the thermodynamic stabilities of coordination compounds. |
| (III) The crystal field splitting \[{{\Delta }_{{}^\circ }},\] depends upon the field produced by the ligand and charge on the metal ion. Amongs the following correct statements are: |
A) I, II
B) I, III
C) I, II, III
D) II, III
Correct Answer: B
Solution :
I : As all are weak field ligands therefore all will have same 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.
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