Which statement is true regarding elementary reactions within the context of reaction mechanisms? 

A.
All steps in a reaction mechanism must be elementary reactions.
B.
A reaction mechanism can involve multiple elementary reactions.
C.
Elementary reactions are only observed in homogeneous systems.
D.
Elementary reactions cannot be catalyzed.
Chemistry
AP
College Board
Exam No:AP Chemistry Problem Set 6 Year:2024 Question No:APChemistry2024AP0474

Answer:

B

Knowledge points:

5.4 Elementary Reactions

Solution:

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