Question

When could order and molecularity of a reaction be same?

Answer 1

In fact, molecularity and order of reactionare identical if the reaction is elementary. They may become different when the reaction is complex and has a mechanism. The molecularity of a reaction is defined as the number of molecules or ions that participate in the rate determining step

Answer 2

Explanation:

Order and molecularity of a reaction will be same if the reaction is elementary. For eg: A +B=C+D. So molecularity of reaction is 2 and order is also 2.