Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers: `K[Cr(H_2O)_2(C_2O_4)_2]`

Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers: [Co(en)_3]CI_3

Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers: [Pt(NH_3)(H_2O)CI_2]

Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers: [CO(NH_3)_5(NO_2)](NO_3)_2

Draw the structures of optical isomers of: [Cr(C_2O_4)_3]^3-

The structure of H_2O_2 is

Draw the structures of optical isomers of : Cr(NH_3)_2Cl_2 (en)]^+

H_2O has structure

Draw structures of geometrical isomers of [Fe(NH_3)_2(CN)_4]

Draw the structure of H_2S_2O_7 .