JAMB - Chemistry (1991 - No. 26)
Magnesium (IV) oxide is known to hasten the decomposition of hydrogen peroxide. Its main action is to?
increase the surface area of the reactants
increase the concntration of the reactants
lower the activation energy for the reaction
lower the heat of reaction, ∆H, for the reaction
Explanation
As a catalyst, MnO2 lowers activation energy of a reaction.