Which of the following will show optical isomerism? .

Options

A. `[ZnCl_(4)]^(2-)`
B. `[Cu(NH_(3))_(4)]^(2+)`
C. `[Cr(C_(2)O_(4))_(3)]^(3-)`
D. `[Co(CN)_(6)]^(3-)`

Answer

C

Explanation

Optical isomerism is very common in otahedral complexes having general formula `[MA_(2)B_(2)C_(2)]^(n-)`
`[M(A A)_(3)]^(n-),[M(A A)_(2)b_(2)]^(n-),[M(A A)_(2)AB]^(n-)` and ,.
`[M(AB)_(3)]^(n-)` where `A A` is symmetrical bidentate ligand
`such as underset(COO^(Θ))overset(COO^(Θ))overset(|)`
and `AB` is unsymmetrical bidentate ligand .