Amongst the following, identify the species with an atom in +6 oxidation state:

Options

A. `MnO_4^-`
B. `Cr(CN)_6^(3^-)`
C. `NiF_6^(2-)`
D. `CrO_2 CI_2`

Answer

D

Explanation

Oxidarion state Mn in `MnO_4^-, x-8 = -1, x = +7`
Oxidation state Cr in `Cr (CN)_6^(3-), x-6 = 3, x = +3`
Oxidation state Ni in Ni `(F_6)^(2-), x-6 =-2, x= +4`
Oxidation state Cr in `CrO_2Cl_2, x-4-2 =0, x= +6`