Question

Which reaction is this?

$4Fe+3O_2+3H_{2}O\to 2F{e}_2{O}_3\to 3H_{2}O$

Answer 1

$\stackrel{0}{4Fe}+\stackrel{0}{3O_2}+3H_2{O}^{-2}⟶\stackrel{+3}{2F{e}_2{O}_3}+3H_2{O}^{-2}$

This is a redox reaction as both increase and decrease of oxidation state can be seen, or in other words both oxidation and reduction can be seen.