CBSE 2026 · Region 4 · Set 1 · Q15 · 1 mark
Assertion $\displaystyle (A)$ : For complex reaction, order of reaction is given by the slowest step.
Reason (R) : Order of a reaction is an experimental quantity.
Official answer
From CBSE’s own marking scheme for this paper.
(B)
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Chemical KineticsFactors Influencing Rate of a ReactionUnderstandassertion_reasonmedium
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CBSE Class 12 Chemistry past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.