Which of the following is the best definition of a catalyst?
A)A catalyst is a material that speeds up the rate of a chemical reaction.
B)A catalyst is a material that speeds up the rate of a chemical reaction without participating in the reaction.
C)A catalyst is a material that speeds up the rate of a chemical reaction without being consumed during the reaction.
D)All of the above are equally good definitions.

Question

Quizplus · Accepted Answer

A catalyst is a substance that speeds up the rate of a chemical reaction without being consumed during the reaction. This means that it is not used up in the reaction and can be used over and over again to speed up multiple reactions. While choices A and B are partially correct, they do not fully capture the key characteristic of a catalyst, which is that it is not consumed during the reaction. Therefore, C is the best and most accurate definition of a catalyst.

Which of the Following Is the Best Definition of a Catalyst