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