The pair of compounds in which the metals are in their highest oxidation state is

Options

A. `[Fe(CN)_(7)]^(3-),[Co(CN)_(6)]^(3-)`
B. `CrO_(2)Cl_(2),MnO_(4)^(-)`
C. `TiO_(2),MnO_(2)`
D. `[Co(CN)_(6)]^(3-),Mn_(2)O_(7)`

Answer

B

Explanation

1. Oxidation state of iron is +3 but it can e x ceed to a maximum of +6. Oxidation state of c obalt is +3 but it can exceed to a maximum of +4. ltBrgt 2. Highest oxidation state of Cr in ` CrO_(2)Cl_(2)` is +6 and highest oxidation state of Mn in `MnO_(4)^(-)` is +7.
3. Oxidation state of titanium is +2 but it can exceed to a maximum of +4. Oxidation state of Mn is +4 but it can exceed to a maximum of +7 .
4. Oxidation state of cobalt is +3 but it can exceed to a maximum of +4. Oxidation state of Mn is +7 which is its highest oxidation state.