Which statement best describes the amount of catalyst that remains at the end of a reaction? a. more catalyst is present at the end than at the beginning of the reaction. b. less catalyst is present at the end than at the beginning of the reaction. c. the amount of catalyst is the same at the end as at the beginning of the reaction. d. the catalyst is consumed by the reaction, so none remains at the end of the reaction.

The correct answer is option C. The amount of catalyst is the same at the end as at the beginning of the reaction.

The catalyst is a compound, which is added to a chemical reaction to speed it up. The catalyst act as an enhancer of the reaction, it is not involved in the reaction. As the catalyst is not involved in the reaction process, then amount of the catalyst is not reduced during the reaction. Also, the catalyst is not generated during the reaction so, the amount of the catalyst does not increase. So, the amount of the catalyst present in the starting remains the same at the end of the reaction.