AP EAMCET Engineering 17 Sep 2020 Shift 2 Paper

All four complexes given are outer orbital or high spin octahedral complexes. So, d -orbital electrons of central metal ions of the complexes remain unaffected by weak field ligands. So, d -configuration of free Mn+ and coordinated Mn+ will remain same.
[∵n= Number of unpaired electrons ]
2. [

III

Fe

F6]3−⟶Fe3+⇒d5,n=5
3. [

III

Co

F6]3−⟶Co3+⇒d6,n=4
So, complexes 1 and 3 have same number of unpaired electrons (n=4).