✓ Board-verified
Chemistry · 2025 · 2 marks
CBSE 2025 · Region 5 · Set 1 · Q19
(a) Write the rate law expression for the reaction 2 HI → H_2+ I_2, if the order of the reaction is zero. (b) What is the effect of temperature on…
(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
All Chemical Kinetics questions2025 question paperNCERT solutions: Chemical KineticsPractice Chemical Kinetics →
More from Chemical Kinetics
- Assertion: Order of reaction is applicable to elementary as well as complex reactions. Reason (R): For a complex reaction molecularity has no meaning.2023 · asked 2×
- For the reaction 3 A → 2 B, rate of reaction +(d[B])/dt is equal to2023 · asked 2×
- Assertion: For a zero order reaction the unit of rate constant and rate of reaction are same. Reason (R): Rate of reaction for zero order reaction is…2023 · asked 2×
- Assertion: Hydrolysis of an ester follows first order kinetics. Reason (R): The concentration of water does not get altered much during the reaction.2025
- Show that the time required for 99.9 % completion in a first order reaction is 10 times of half-life (t_1 / 2) of the reaction [ log 2=0.3010, log…2024
- In the given reaction N_2( g)+3 H_2( g) → 2 NH_3( g) the rate of formation of NH_3 is 3 · 6 × 10^-4 mol L^-1 s^-1. Calculate the (i) rate of…2022
- Reactant 'A' underwent a decomposition reaction. The concentration of 'A' was measured periodically and recorded in the table given below: Based on…2025
- Which of the following curve represents the first order reaction?2026
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.