1.

The oxidation number of Fe in [Fe(CN)_6]^(4-)Cr in [Cr(NH_3)_3(NO_2)_3] and Ni in Ni(CO)_4 are respectively

Answer»

0,+3,+2
`+3,+3,0`
`+3,0,+3`
`+2,+3,0`

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