1.

Optical isomerism is exhibited by (ox = oxalate anion, en = ethylene diamine)

Answer»

`cis-[CrCl_(2)(o x)_(2)]^(3-)`
`[Co(en)_(3)]^(3+)`
trans-`[CrCl_(2)(o x)_(2)]^(3-)`
`[Co(o x)(en)_(2)]^(+)`

Solution :trans-isomers (c ) has a plane of SYMMETRY and hence does not SHOW optical isomerism.


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