Identify species having metal atom in +6 oxidation state from following

Step-by-step solution

Let x be the oxidation state of the metal atom in each species. For MnO ₄^- , the oxidation state of Mn is calculated as: x + 4(-2) = -1 x = +7 For [ Cr ( CN )₆]³⁻ , the oxidation state of Cr is calculated as: x + 6(-1) = -3 x = +3 For Cr ₂ O ₃ , the oxidation state of Cr is calculated as: 2x + 3(-2) = 0 x = +3 For CrO ₂ Cl ₂ , the oxidation state of Cr is calculated as: x + 2(-2) + 2(-1) = 0 x - 6 = 0 x = +6 Thus, CrO ₂ Cl ₂ has the metal atom in the +6 oxidation state. Answer: CrO ₂ Cl ₂