CBSE 2023 · Region 1 · Set 2 · Q4 · 1 mark
A first order reaction takes $\displaystyle 30$ minutes for $\displaystyle 50 \%$ completion. The value of rate constant k would be:
Official answer
From CBSE’s own marking scheme for this paper.
(D)
$\displaystyle 2.31 \times 10^{-3} \mathrm{~min}^{-1}$
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CBSE Class 12 Chemistry past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.