Chemical Kinetics JEE Questions PDF with Solution, Practice Now

Chemical Kinetics JEE Questions is a highly important topic for Physical Chemistry in JEE Main and Advanced. This topic is concerned with the rate of chemical reactions and what factors control that rate. The study of rate laws, order of reaction and mechanisms are not just helpful for board or JEE exam, but they also give a peek into how reactions really happen in real life. As per the JEE Main Syllabus, the JEE Main exam pattern is such that candidates get to see both conceptual and numerical type questions quite often in the JEE exam. Practising chemical kinetics JEE questions like rate law problems, prepares one with improved accuracy, speed in problem solving and exam confidence.

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Chemical Kinetics JEE Questions Overview

Chemical kinetics is one of the scoring chapters of Physical Chemistry. Chemical kinetics covers the study of the measurement of reaction rates, changes of reaction rates with changes in reaction conditions, and using rate laws to calculate various parameters. In JEE Main, generally, questions on integrated rate equations, half-life, and basic concepts of order and molecularity are asked. In JEE Advanced, students face tough problems such as complex mechanisms and graph-based analysis of reaction rates.

Practice Chemical Kinetics JEE Questions

Here are some Chemical Kinetics JEE Questions for practice. It is based on the JEE exam pattern.

1. If k is the rate constant of a first-order reaction, the plot of log k vs (1/T), where T is the temperature in kelvin, is a straight line with OX = 5 and θ = tan⁻¹ { -4 / 2.303 }. Calculate the energy of activation in calories.

A. 4
B. 8
C. 3.47
D. 9.21

2. For a first order reaction, 3A → B. Variation of concentration vs time is given as:

Conc (M) = 3 M → decreases with time

At t₁/₂ = 0.0693/2 sec, 3k = 0.693/0.0693 = 20.
Then rate constant (k) = 20/3 s⁻¹.
Find the value of (3/4) × ?

A. 5
B. 3
C. 6
D. 15

3. If the rate of reaction grows 16 times on increasing the temperature by 40 K, then what is the temperature coefficient of the reaction?

A. 4
B. 2
C. 16
D. 8

4. Under the same reaction conditions, initial concentration of 1.386 mol dm⁻³ of a substance becomes half in 40 s and 20 s through first order and zero order kinetics respectively. Ratio [k₁/k₀] of the rate constants for first order (k₁) and zero order (k₀) of the reaction is:

A. 0.5 mol⁻¹ dm³
B. 1.0 mol dm⁻³
C. 1.5 mol dm⁻³
D. 2.0 mol⁻¹ dm³

5. If I is the intensity of absorbed light and C is the concentration of AB for the photochemical process. AB + hν → AB, the rate of formation of AB is directly proportional to:

A. C
B. I
C. I²
D. C·I

6. Given X → product (first-order reaction):

Half-life period of this reaction is:
A. 0 min
B. 20 min
C. 40 min
D. None of these

7. For the elementary reaction, M → N the rate of disappearance of M increases by a factor of 8 upon doubling the concentration of M. The order of the reaction with respect to M is:

A. 4
B. 3
C. 2
D. 1

8. In the reaction, P + Q → R + S, the time taken for 75% reaction of P is twice the time taken for 50% reaction of P. The concentration of Q varies with reaction time as shown in the figure. The overall order of the reaction is:

A. 2
B. 3
C. 0
D. 1

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Chemical Kinetics JEE Questions PDF with Solution

For thorough practice, PW has prepared a Chemical Kinetics JEE Questions PDF with Answer and Solution according to the JEE exam pattern. The PDF comprises a broad assortment of chemical kinetics questions JEE Mains, complete explanations of JEE Advanced rate law questions, and a meticulously put together collection of vital kinetics PYQs for JEE.