1.

Fac-mer isomerism is shown by……… .

Answer»

`[Co(EN)_(3)]^(3+)`
`[Co(NH_(3))_(4)(Cl)_(2)]^(+)`
`[Co(NH_(3))_(3)(Cl)_(3)]`
`[Co(NH_(3))_(5)Cl]SO_(4)`

ANSWER :C


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