CBSE 2025 · Region 7 · Set 1 · Q18 · 2 marks
State a condition under which a bimolecular reaction is kinetically first order reaction. Give an example. For which type of reactions, do order and molecularity have the same value ?
Marking-scheme solution
When one of the reactant is present in excess
Hydrolysis of an ester/ sucrose
For elementary reaction, which takes place in a single step.
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.