Question -
Answer -
1. K[Cr(H2O)2(C2O4)2
2. [Co(en)3]Cl3
3. [Co(NH3)5(NO2)](NO3)2
4. [Pt(NH3)(H2O)Cl2]
Answer
1 Bothgeometrical (cis-, trans-) isomers for
canexist. Also, optical isomers for cis-isomer exist.
Trans-isomer is opticallyinactive. On the other hand, cis-isomer is optically active.
2 Two optical isomers for 
exist.
Two optical isomers are possible for thisstructure.
3 
A pair of optical isomers:
It can also show linkage isomerism.
and 
It can also show ionization isomerism.
4 Geometrical (cis-, trans-) isomers of 
can exist.
