Question

Among the following, identify the species with an atom in +6 oxidation state
(a) $MnO_4^-$
(b) $Cr(CN)_6^{3-}$
(c) $NiF_6^{2-}$
(d) CrO₂Cl₂

Answer 1

Answer should be d as oxygen is in -2 and Cl in -1 oxidation state