The pair of compounds having metals in their highest oxidation state is .

Options

A. `MnO_(2),FeCI_(3)`
B. `[MnO_(4)]^(Θ),CrO_(2)CI_(2)`
C. `[Fe(CN)_(6)]^(3-),[Co(CN)_(6)]^(3-)`
D. `[NiCI_(4)]^(2-),[CoCI_(4)]^(Θ)`

Answer

b

Explanation

`MnO_(2)(+4)` and `FeCI_(3)(+3)`
(b) `MnO_(4)^(Θ)(+7)` and `CrCO_(2)CI_(2)(+6)`
(c ) `[Fe(CN)_(6)]^(3-)(+3)` and `[Co(CN)_(6)]^(3-) (+3)`
(d) `[NiCI_(4)]^(2-)` and `[CoCI_(4)]^(+3)`
For manganese, `+7` is the maximum oxidation state and for chromium `+6` is the maxium oxidation state .