WAEC - Chemistry (2010 - No. 28)

What is the change in oxidation number of manganes in the reaction represented by the following equation? MnO^-_4(aq) + 8H⁺_(aq) + 5e^- → Mn²⁺_(aq) + 4H₂O_(l)

+3 to + 2

+ 4 to + 2