The compound `Co(en)_(2)(NO_(2))_(2)CI` has been prepared in these isomeric forms `A,B` and `C` A does not react with `AgNO_(3)` or (en) and is optically inactive `B` reacts with `AgNO_(3)` but not with `(en)` and is optically inactive `C` is optically active and reacts with both `AgNO_(3)` and (en) identify each of these isomeric forms and draw their structures .

Explanation

(i) Since `A` does not react with `AgNO_(3)` thus in `A CI^(Θ)` is not present as counter ion but acts ligand `So` structure of `A` may be `[Co(en)_(2)(NO_(2))CI]NO_(2)`
(ii) Since `(B)` and ` (C )` reats with `AgNO_(3)` so `CI^(Θ)` is present as counter ion Thus structure of `B` and `C` may be
`[Co(en)_(2)(NO_(2))_(2)]CI` ltvbrgt (iii) 'B' does not react with 'en' so it is trans isomer
(iv) 'C' reacts with `en' so it is cis-isomer
Reactions are `CN` of `Co=6`
So it has octahedral geometry
`A impliesO1`
`BimpliesOI` (Trans isomer)
`CimpliesOA` (cis isomer
`CI^(Θ)overset(AgNO_(3))rarrAgCI`
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