$[Fe(NO_{2})_{3} Cl_{3}]$ and $[Fe(ONO)_{3} Cl_{3}]$ show

For the octahedral complexes of $Fe^{3+}$ in $SCN^{-}$ (thiocyanato-$S$) and in $CN^{-}$ ligand environments,the difference between the spin-only magnetic moments in Bohr magnetons (when approximated to the nearest integer) is
[Atomic number of $Fe = 26$]

Which of the following complexes can exhibit facial $(fac)$ and meridional $(mer)$ isomerism?

Which of the following ions has a magnetic moment of $5.93 \ BM$?

What type of color is observed when a compound absorbs $red$ coloured light?

The total number of isomers for a square planar complex $[M(F)(Cl)(SCN)(NO_2)]$ is