Among the following the specials that is both paramagnetic and coloured is :

Options

A. `[MnO_4]^(2-)`
B. `[TiCl_6]^(2-)`
C. `[VO_4]^(3-)`
D. `CrO_2Cl_2`

Answer

A

Explanation

`[MnO_4]^(2-)` , Mn is in +6 oxidation state. Electronic configuration is `[Ar]^18 3d^1 4s^0`.As it contains one unpaired electron it is paramagnetic and green coloured because of d-d transition in visible region.
`[TiCl_6]^(2-), [VO_4]^(3-) and CrO_2Cl_2` are diamagnetic because all electrons are paired