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Chemistry · 2025 · 2 marks
CBSE 2025 · Region 5 · Set 2 · Q19
(a) Define rate constant. (b) Identify the reaction order which has a rate constant of 4 · 5 × 10^-5 L mol^-1 s^-1.
(a)
Define rate constant.
(b)
Identify the reaction order which has a rate constant of $\displaystyle 4 \cdot 5 \times 10^{-5} \mathrm{~L} \mathrm{~mol}^{-1} \mathrm{~s}^{-1}$.
Marking-scheme solution
(a)
It is the rate of reaction when concentration of a reacting species is taken as unity .
(b)
2nd order
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CBSE Class 12 Chemistry past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.