Answer:
\(Fe_{2}O_{3}+3CO\rightarrow 2Fe+3CO_{2}\) is an oxidation-reduction reaction.
Explanation:
In an oxidation-reduction reaction, the oxidation number of some elements must change during reaction.
\(Fe_{2}O_{3}+3CO\rightarrow 2Fe+3CO_{2}\) represents an oxidation-reduction reaction.
oxidation number
Fe in \(Fe_{2}O_{3}\) +3
Fe in Fe 0
C in CO +2
C in \(CO_{2}\) +4
SO, oxidation number of Fe decreases during reaction. Hence \(Fe_{2}O_{3}\) is being reduced. Also, oxidation number of C increases during reaction. Hence CO is being oxidized.
In all other given reactions, oxidation number of elements are not changed during reaction. Hence they are not oxidation-reduction reaction.
