Chemistry - Chemical Kinetics Question with Solution | TestHub

During the thermal decomposition of ${\text{KClO}}_3$, ${\text{MnO}}_2$ acts as a positive catalyst.

A positive catalyst increases the rate of a chemical reaction by providing an alternative reaction pathway that has a lower activation energy.

Therefore, ${\text{MnO}}_2$ decreases the energy of activation of the reaction.

Answer: It decreases the energy of activation of the reaction.