Which element shows fractional oxidation state in Fe₃O₄?
In Fe₃O₄ (mixed oxide of FeO and Fe₂O₃), Fe has states +2 and +3, averaging to +8/3.
Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Balancing Redox Reactions - Oxidation Number Method and Half Reaction
