CBSE 2025 · Region 7 · Set 3 · Q18 · 2 marks
Why is molecularity applicable only for elementary reactions and order is applicable for elementary as well as complex reactions?
Marking-scheme solution
Because molecularity of each elementary reaction in complex reaction may be different
and hence meaningless for overall complex reaction
whereas order of a complex reaction is experimentally determined by the slowest step in its
mechanism and is therefore applicable for both.
Chemical KineticsFactors Influencing Rate of a ReactionUnderstandvery_short_answermedium
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CBSE Class 12 Chemistry past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.