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JEE-ADVANCED SERIES
Chemistry

Chemical Kinetics

21 previous year questions.

Volume: 21 Ques
Yield: High

High-Yield Trend

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Chapter Questions
21 MCQs

01
PYQ 1981
medium
chemistry ID: jee-adva
The rate constant of a reaction depends on
1
temperature
2
initial concentration of the reactants
3
time of reaction
4
extent of reaction
02
PYQ 1983
medium
chemistry ID: jee-adva
A catalyst is a substance which
1
increases the equilibrium concentration of the product
2
changes the equilibrium constant of the reaction
3
shortens the time to reach equilibrium
4
supplies energy to the reaction
03
PYQ 1986
hard
chemistry ID: jee-adva
The half-life period of a radioactive element is 140 days. After 650 days, one gram of the element will reduce to
1
2
3
4
04
PYQ 1996
medium
chemistry ID: jee-adva
is a stable isotope, is expected to decay by
1
-emission
2
-emission
3
positron emission
4
proton emission
05
PYQ 1998
medium
chemistry ID: jee-adva
For the first order reaction,
1
the degree of dissociation is equal to
2
a plot of reciprocal concentration of the reactant vs time gives a straight line
3
the time taken for the completion of 75% reaction is thrice the of the reaction
4
the pre-exponential factor in the Arrhenius equation has the dimension of time,
06
PYQ 1999
medium
chemistry ID: jee-adva
The following statement (s) is are correct
1
A plot of log is linear
2
A plot of log [X] vs time is linear for a first order reaction,
3
A plot of log p vs is linear at constant volume
4
A plot of p vs A plot of p vs
07
PYQ 2001
medium
chemistry ID: jee-adva
If I is the intensity of absorbed light and C is the concentration of AB for the photochemical process. AB, for the rate of formation of AB is directly proportional to
1
C
2
I
3
4
C.I
08
PYQ 2002
medium
chemistry ID: jee-adva
Consider the chemical reaction, .The rate of this reaction can be expressed in terms of time derivatives of concentration of . Identify the correct relationship amongst the rate expressions
1
2
3
4
09
PYQ 2003
medium
chemistry ID: jee-adva
In first order reaction, the concentration of reactant decreases from to in . The rate constant is
1
2
3
4
10
PYQ 2004
medium
chemistry ID: jee-adva
For a first order reaction, product. Concentration of , changes from to in minutes the rate of reaction of when concentration of is is :
1
2
3
4
11
PYQ 2005
medium
chemistry ID: jee-adva
Which one of the following statements) is incorrect about order of reaction?
1
Order 6'f reaction is determined experimentally
2
Order o f reaction is equal to sum o f the power o f concentration terms in differential rate law
3
It is not affected with stoichiometric coefficient o f the reactants
4
Order cannot be fractional
12
PYQ 2009
medium
chemistry ID: jee-adva
For a first order reaction, , the temperature dependent rate constant was found to follow the equation: . The pre-exponential factor and the activation energy , respectively, are
1
and
2
and
3
and
4
and
13
PYQ 2010
medium
chemistry ID: jee-adva
Plots showing the variation of the rate constant with temperature are given below. The plot that follows Arrhenius equation is
1
2
3
4
14
PYQ 2014
medium
chemistry ID: jee-adva
For the elementary reaction, , the rate of disappearance of increases by a factor of upon doubling the concentration of . The order of the reaction with respect to is
1
4
2
3
3
2
4
1
15
PYQ 2018
medium
chemistry ID: jee-adva
For a first order reaction at constant volume and , the total pressure at the beginning and at time are and , respectively. Initially, only is present with concentration , and is the time required for the partial pressure of to reach of its initial value. The correct option(s) is (are) (Assume that all these gases behave as ideal gases)
1
2
3
4
16
PYQ 2019
medium
chemistry ID: jee-adva
In the decay sequence, and are particles/radiation emitted by the respective isotopes. The correct option(s) is(are)
1
will deflect towards negatively charged plate
2
is
3
is -ray
4
is an isotope of uranium
17
PYQ 2021
easy
chemistry ID: jee-adva
For the following reaction the rate of reaction is Two moles of are mixed with one mole of to make of solution At , mole of is left in the reaction mixture The correct statement(s) about the reaction is(are) (Use :
18
PYQ 2021
easy
chemistry ID: jee-adva
For the following reaction;
The rate of reaction is

Two moles of X are mixed with one mole of Y to make 1.0 L of solution. At 50 s, 0.5 mole of Y is left in the reaction mixture. The correct statement(s) about the reaction is(are). (Use: ln 2 = 0.693)
1
The rate constant, k, of the reaction is 13.86 × 10-4 s-1.
2
Half-life of X is 50 s.
3
At 50 s, – d[X] / dt = 13.86 × 10-3 mol L-1 s-1.
4
At 100 s, d[Y] / dt = 3.46 × 10-3 mol L-1 s-1.
19
PYQ 2024
easy
chemistry ID: jee-adva
Consider the following reaction,

which follows the mechanism given below:
(fast equilibrium)
(slow reaction)
(fast reaction)
The order of the reaction is________
20
PYQ 2025
medium
chemistry ID: jee-adva

Consider a reaction . The rate of this reaction is measured to be . At the start of the reaction, the concentration of , , is 10-times the concentration of , . The reaction can be considered to be a pseudo first order reaction with assumption that is constant. Due to this assumption, the relative error (in %) in the rate when this reaction is 40% complete, is ____. [ and represent corresponding rate constants]

21
PYQ 2025
medium
chemistry ID: jee-adva

Consider a reaction . The rate of this reaction is measured to be . At the start of the reaction, the concentration of , , is 10-times the concentration of , . The reaction can be considered to be a pseudo first order reaction with assumption that is constant. Due to this assumption, the relative error (in %) in the rate when this reaction is 40% complete, is ____. [ and represent corresponding rate constants]

About Chemical Kinetics - JEE-ADVANCED

Chemical Kinetics is a vital chapter for JEE-ADVANCED aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.

By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.

Frequently Asked Questions

Why focus on Chemical Kinetics PYQs?

Analyzing PYQs for this specific chapter reveals the most frequently tested concepts and the typical complexity of questions, allowing you to tailor your study plan efficiently.

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Review the topic breakdown to see which sub-topics within Chemical Kinetics carry the most weight. Then, tackle the questions iteratively to solidify your understanding.