Which of the following metal ions is colored in aqueous solution ?

Options

A. `V^(2+)` and `Cr^(2+)`
B. `Ti^(2+)` and `Cr^(2+)`
C. `Mn^(3+)` and `Co^(3+)`
D. `V^(2+)` and `Fe^(2+)`

Answer

C

Explanation

Oxidising agents are those which oxidise other compounds and get reduced themselves.
`Mn^(3+) and Co^(3+)` can act as stronger oxidising agents because their least oxidation state is +2. So they can get reduced from +3 oxidation state to +2 oxidation state hence act as strong oxidising agents.