Question

Give the oxidation state of underlined.
$\underset{–}{F{e}_3}{O}_4$.

Answer 1

$F{e}_3{O}_4$ is a mixed oxide of $FeO$ and $F{e}_2{O}_3$.Oxidation number of $Fe$ in $FeO$ and $F{e}_2{O}_3$ is +2 and +3 as oxidation number of oxygen is -2.