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Using the valence bond theory, predict t...

Using the valence bond theory, predict the geometry and magnetic character of
(i) `[NiCl_(4)]^(2-)` (ii) `[Ni(CO)_(4)]` (iii) `[Ni(CN)_(4)]^(2-)` (iv) `[Ni(NH_(3))_(6)]^(2+)` (v) `[Ni(NH_(3))_(4)]^(2+)`
(At No. of Ni = 28)

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