Which of the following does not show optical isomerism?
[Co(NH3)3Cl3]0
[Co (en) Cl2 (NH3)2]+
[Co (en)3]3+
[Co (en)2Cl2]+ (en = ethylenediamine)
As complexes of the type [MA3B3] can show geometrical isomerism knows as fac-mer isomerism and not optical isomerism. So here [Co(NH3)3Cl3]0 can not show optical isomerism.