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

Options

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

Answer

B, C

Explanation

(A) In `[Fe(CN)_(6)]^(3-)`,O.S. of Fe = +3
In `[Co(CN)_(6)]^(3-)`,O.S. of Co = +3
(B) In `CrO_(2)Cl_(2)` , O.S of Cr = +6
In `MnO_(4)^(-)` , O.S. of Mn = +7
(C) In `TiO_(3)` , O.S. of Ti = +6
In `MnO_(2)` , O.S of Mn = +4
(D) In `[Co(CN)_(6)]^(3-)` , O.S of Co = +3
In `MnO_(2)`, O.S. of Mn = +4.