The existence of two different coloured complexes with the composition of ${\left[ {{\rm{Co}}{{\left( {{\rm{N}}{{\rm{H}}_3}} \right)}_4}{\rm{C}}{{\rm{l}}_2}} \right]^ + }$ is due to:

Which type of isomerism is NOT exhibited by the complex $[CoCl_2(en)_2]$?

Which of the following shows metamerism?

The type of isomerism shown by, 6,6’-disitrodiphenic acid is

A coordination complex with the formula $[MA_2B_2]$ (where A and B are monodentate ligands) can exhibit which type of isomerism?

${\left[ {{{\rm{C}}_6}{{\rm{H}}_5}} \right]_2}{\rm{Pd}}\left. {{{\left( {{\rm{SCN}}} \right)}_2}} \right]\,\,{\rm{and}}\,\,\left[ {{{\left( {{{\rm{C}}_6}{{\rm{H}}_5}} \right)}_2}{\rm{Pd}}{{\left( {{\rm{NCS}}} \right)}_2}} \right]$ are:

Which of the following will give a pair of enantiomorphs?

The type of isomerism shown by $\left[ {{\rm{Co}}{{\left( {{\rm{en}}} \right)}_2}{{\left( {{\rm{NCS}}} \right)}_2}} \right]{\rm{Cl}}$ and $\left[ {{\rm{Co}}{{\left( {{\rm{en}}} \right)}_2}\left( {{\rm{NCS}}} \right){\rm{Cl}}} \right]{\rm{NCS}}$ is:

Which of the following does not show optical isomerism?

A chiral organic compound (A) with molecular formula $C_7H_{16}O$ on treatment with conc. $H_2SO_4$ at room temperature gives compound (B), $C_7H_{14}$. Compound (B) does not show geometrical isomerism. How many chiral centers are present in compound (A)?

Which one of the following will be able to show $Cis - \,trans -$isomerism? $(AA'$ is unsymmetrical bidentate ligand, $ABCD$ are unidentate ligands.)