The type of isomerism between $[Co(en)_2(NCS)_2]Cl$ and $[Co(en)_2(NCS)Cl]NCS$ is ............ .

Select the correct statement about $[Mn(CO)_4NO]$ which is diamagnetic.

The coordination compound with the molecular formula $[CO(NO_2)(SCN)(en)_2]Br$ exhibits which of the following types of isomerism?

Which of the following compound$(s)$ exhibit geometrical isomerism?
$(i) [Pt(en)Cl_2]$
$(ii) [Pt(en)_2]Cl_2$
$(iii) [Pt(en)_2Cl_2]Cl_2$
$(iv) [Pt(NH_3)_2Cl_2]$

Consider the following complex ions $P = [FeF_6]^{3-}$,$Q = [V(H_2O)_6]^{2+}$,$R = [Fe(H_2O)_6]^{2+}$. The correct order of the complex ions,according to their spin-only magnetic moment values (in $B.M.$) is:

The number of geometrical isomers of the complex $[Co(NO_2)_2(NH_3)_2]$ is