What is the value of the magnetic moment of $Co^{2+}$ (in $BM$)?

The complex ion $[Pt(NO_2)(py)(NH_3)(NH_2OH)]^{+}$ exhibits how many geometric isomers?

Which of the following spin paramagnetic complexes shows both geometrical and optical isomerism?

The spin-only magnetic moment value of the square planar complex $[Pt(NH_3)_2 Cl(NH_2 CH_3)] Cl$ is $B.M.$ (Nearest integer). (Given atomic number for $Pt = 78$)

$A$ metal complex of coordination number six having three different types of ligands $a$,$b$ and $c$ of composition $Ma_2b_2c_2$ can exist in several geometrical isomeric forms; the total number of such isomers is

Which one of the following shows maximum paramagnetic character?