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Order applies to elementary reactions and also to those that are:

AComplex
BImagined
CReversed
DForbidden
Answer & Solution
Correct answer: A. Complex
1. Molecularity is defined only for elementary steps. 2. Order is not restricted in that way. 3. It applies to complex reactions as well. _Source: syllabus Chemistry Part I, Chapter 4, Chemical Kinetics._
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