Chemical Kinetics Important Question for CBSE Class 12 Board Chemistry Exam 2025

Chemical Kinetics Important Questions for CBSE Class 12 Board Chemistry Exam 2025 are available here for candidates preparing for the upcoming CBSE Class 12th Board Exam 2025.

Abhilasha Kiran

Updated on - Feb 7, 2025 | 10:32:00 AM

Chemical Kinetics Important Question for CBSE Class 12 Board Chemistry Exam 2025 is here (Image Credits: pexels.com).

Chemical Kinetics Important Question for CBSE Class 12 Board Chemistry Exam 2025: Students gearing up for the CBSE Class 12 Board Exam 2025 can level up their preparation strategy with the Important Question for CBSE Class 12 Board Chemistry Exam 2025 available below. Here, we have discussed the Chemical Kinetics Important Question for CBSE Class 12 Board Chemistry Exam 2025. It is the third chapter in the Class 12th Chemistry syllabus and often proves to be a significant hurdle. To help students navigate the complexities of this crucial chapter, this article provides a curated list of important questions about Chemical Kinetics for the CBSE Class 12 Board Chemistry Exam 2025 that will test their understanding and improve their exam readiness.

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Chemical Kinetics Important Question for CBSE Class 12 Board Chemistry Exam 2025

The Chemical Kinetics chapter of Chemistry class 12 focuses on the factors influencing the speed of chemical reactions. Key concepts include defining and calculating reaction rates, expressing rates in terms of concentration changes, differentiating between elementary and complex reactions, and distinguishing between molecularity and the experimentally determined order of a reaction. The chapter also introduces the rate constant, a proportionality constant that relates reaction rate to reactant concentrations. Students can check the Important Question of Kinetics for CBSE Class 12 Board Chemistry Exam 2025 below.

Chemical Kinetics Important Question for CBSE Class 12 Board Chemistry Exam 2025
Question Number	Questions
Ques 1	The first order rate constant for the decomposition of ethyl iodide by the reaction C2H5I(g) Æ C2H4 (g) + HI(g) at 600K is 1.60 × 10–5 s–1. Its energy of activation is 209 kJ/mol. Calculate the rate constant of the reaction at 700K.
Ques 2	A reaction is second order with respect to a reactant. How is the rate of reaction affected if the concentration of the reactant is (i) doubled and (ii) reduced to half?
Ques 3	The rate constant for a first-order reaction is 60 s–1. How much time will it take to reduce the initial concentration of the reactant to its 1/16th value?
Ques 4	For a first-order reaction, show that the time required for 99% completion is twice the time required for the completion of 90% of the reaction.
Ques 5	The decomposition of hydrocarbon follows the equation k = (4.5 × 1011s–1) e-28000K/T. Calculate Ea.
Ques 6	The rate constant for the first-order decomposition of H2O2 is given by the following equation: log k = 14.34 – 1.25 × 104K/T. Calculate Ea for this reaction, and at what temperature will its half-period be 256 minutes?
Ques 7	The rate of a reaction quadruples when the temperature changes from 293 K to 313 K. Calculate the energy of activation of the reaction, assuming that it does not change with temperature.

By practising these Chemical Kinetics Important Questions for the CBSE Class 12 Board Chemistry Exam 2025, candidates can increase their chances of scoring better marks in the CBSE Class 12th Chemistry Exam 2025 scheduled for February 27, 2025. Further, candidates must note that the primary objective of these questions is to assist students in mastering the key concepts and effectively preparing for the CBSE Class 12 Board Chemistry Exam 2025.

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