CBSE 2025 · Region 5 · Set 1 · Q19 · 2 marks
(a)Write the rate law expression for the reaction $\displaystyle 2 \mathrm{HI} \rightarrow \mathrm{H}_{2}+\mathrm{I}_{2}$, if the order of the reaction is zero.(b)What is the effect of temperature on the rate of reaction ? Write a mathematical expression for the same.
(a)
Write the rate law expression for the reaction $\displaystyle 2 \mathrm{HI} \rightarrow \mathrm{H}_{2}+\mathrm{I}_{2}$, if the order of the reaction is zero.
(b)
What is the effect of temperature on the rate of reaction ? Write a mathematical expression for the same.
Marking-scheme solution
(a)
Rate=k[HI]$\displaystyle 0$ =k
(b)
Increases with increase in temperature
k =A e-Ea/RT / lnk = lnA - Ea/RT
Chemical KineticsFactors Influencing Rate of a ReactionUnderstandvery_short_answereasy
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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.