1.

Indicate the complex ion which shows geometrical isomerism.

Answer»

`[Cr(H_(2)O)_4)Cl_(2)]^(+)`
`[Pt(NH_(3))_(3)CL]`
`[Pt(NH_(3))_(6)]^(3+)`
`[CO(CN)_(5)(NC)]^(3-)`

ANSWER :A


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