Anfo is an explosive mixture of ammonium nitrate, nh4no3, and fuel oil. when this mixture explodes, the ammonium nitrate undergoes

This undergoes both oxidation and reduction. This reaction is a kind of chemical reaction that includes a transmission of electrons between two species. An oxidation-reduction reaction is any chemical reaction in which the oxidation number of an atom, molecule, or ion fluctuates by attaining or dropping an electron.