The effect of a catalyst is
A catalyst allows an alternative reaction pathway that leaves activation energy than the uncatalysed reaction. This does not change the frequency of collision.
Frequency of collision depend upon concentration of reactant temperatures
Hence, catalyst lowers the activation energy of reaction thereby making it easier for the reactant to get over the energy hump.
For more information on catalyst, visit
https://brainly.com/question/18464572?referrer=searchResults