does the effect of different catalysts on a reaction can chang the rate of a reaction?

Answer 1

The effect of a catalyst is to lower the activation energy needed for a reaction to proceed. This could allow a reaction to take place at a lower temperature, for example. So the rate of the reaction will definitely be impacted by the catalyst.

Similarly, different catalysts can be more, or less effective, in accelerating the same reaction. So the choice of the catalyst can make a big difference