1.

Acc. to V.B. Theory, the following complexes will have same geometry.

Answer»

`[NI(CN)_(4)]^(2-)`
`[Fe(CN)_(6)]^(-3)`
`[FeF_(6)]^(3-)`
`[CR(NH_(3))_(6)]^(3+)`

Solution :`[Ni(CN)_(4)]^(2-)`- SQUARE planar`[FeF_(6)]^(3-)`- octahedral
`[Fe(CN)_(6)]^(4-)`- octahedral`[Cr(NH_(3))_(6)]^(3+)`- octahedral


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