allerySome higher order reactions still obey a rate law that is:
AThird order
BFourth order
CFirst order
DZero order
Answer & Solution
Correct answer: C. First order
1. One reactant may be present in large excess.
2. Its concentration then hardly changes.
3. So the reaction obeys a first order rate law.
_Source: syllabus Chemistry Part I, Chapter 4, Chemical Kinetics._
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