Among 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)Cl_(2)`

Answer

D

Explanation

Oxidation number are
Mn in `MnO_(4)` is + 7
Cr in `[Cr(CN)_(6)]^(3-) ` is +3 `" " (x-6=-3 " or " x=+3)`
`Ni` in NiF6- is +4 `" "( x-6 =-2 " or " =+4)`
and Cr in `CrO_(2)Cl_(2) ` is +6
`(x + 2) xx(-2) + 2xx(-1) =0 ` or ` x-4-2=0` or x=+6