1.

In which of the following octahedral complexes of cobalt (atomic number = 27) will the magnitude of Delta_0 be the highest?

Answer»

`[CO(C_2O_4)_3]^(3-)`
`[Co(H_2O)_6]^(3+)`
`[Co(NH_3)_6]^(3+)`
`[Co(CN)_6]^(3-)`

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