The correct statement about the magnetic properties of [Fe(CN) 6 ] 3- and [FeF 6 ] 3- is : (Z = 26).

Step-by-step solution

In both complexes Fe is in +3 oxidation state. F - ion is weak field ligand so no pairing of electrons in inner 3d-orbitals & outer orbital complex. sp 3 d 2 hybridisation is formed. have 5 unpaired electrons, so paramagnetic μ [ FeF 6 ] − 3 = 5 ( 5 + 2 ) = 35   B . M ​​ One unpaired Electron, CN - ion strong ligand field. So will pair the d-orbital electrons & form inner orbital hybridization d 2 sp 3 . μ Fe CN 6 3 - = 1 1 + 2      (1 unpaired e - so para magnetic) = 3 B.M .