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Reaction Rate Reduction

APCHEM-14QET8

A catalyst is used to increase the rate of a reaction. Catalysts are instrumental in numerous biological systems, can be applied to environmental applications, and are an integral part of automotive engines.

Which of the following does NOT describe the role of a catalyst in increasing the overall rate of a reaction?

A

A catalyst can lower the activation energy of a slow step in a multi-step reaction, increasing the overall rate of the reaction.

B

When a catalyst lowers the activation energy in an elementary reaction, it can change the mechanism of the reaction.

C

A catalyst can lower the activation energy of a fast step in a multi-step reaction, increasing the overall rate of the reaction.

D

A catalyst can participate in the formation of a new intermediate, causing a new mechanism for the reaction with a faster pathway.