What is the oxidation number of oxygen in KO₂?
In superoxides, O has an oxidation number of -1/2. For KO₂: K = +1, so +1 + 2x = 0, 2x = -1, x = -1/2.
Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Classical and Electronic Concept of Redox and Oxidation Number
