The ionization isomer of $[Cr(H_2O)_4Cl(NO_2)]Cl$ is

The number of geometric isomers that can exist for the square planar complex $[Pt(Cl)(py)(NH_3)(NH_2OH)]^+$ is ($py=$ pyridine):

If $[Co(NH_3)_x(NO_2)_y]$ shows facial and meridional isomers,identify the values of $x$ and $y$.

The correct order of spin-only magnetic moments for the following complex ions is:

The number of possible optical isomers for the complexes $MA_{2}B_{2}$ with $sp^{3}$ and $dsp^{2}$ hybridised metal atom,respectively,is.
Note : $A$ and $B$ are unidentate neutral and unidentate monoanionic ligands,respectively.

Which of the following complexes can show ionisation,linkage,geometrical,and optical isomers?