Chemical Kinetics: JEE Advanced Previous Year Questions with Solutions and weightage

Chemical Kinetics carries approximately 2-3% weightage under the JEE Advanced 2025 exam according to the new JEE Advanced 2025 syllabus and previous years trends. The subject is considered moderate as per conceptual depth. Common concepts such as Rate Laws, Rate Constant, Collision Theory, the Arrhenius Equation, and the characteristics that influence rates of reaction are repeatedly asked in JEE Advanced previous year question papers. Hence, revising this chapter is recommended for satisfactory exam performance.

Must Read Articles:

Most important Topics for JEE Advanced 2025 (Chemical Kinetics):

Based on the JEE Advanced previous year paper trends, the following are the high-weightage topics in JEE Advanced 2025:

Rate Laws & Order of Reaction (JEE Advanced 2023, Paper 1)
Collision Theory & Frequency Factor (JEE Advanced 2021, Paper 2)
Arrhenius Equation & Activation Energy (JEE Advanced 2020, Paper 1)
Determination of Rate Constant & Half-life Period (JEE Advanced 2019, Paper 2)
Factors Affecting Reaction Rates (JEE Advanced 2018, Paper 1)
Integrated Rate Equations for Zero, First, and Second Order Reactions (JEE Advanced 2017, Paper 2)

JEE Advanced previous year question papers and mock tests can assist IIT Aspirants to achieve higher rankings in JEE Advanced 2025.

Listed below the most repeated questions JEE Advanced Previous Year Questions (PYQs) for Chemical Kinetics along with detailed solutions

1. For the following reaction: 2X + Y → P The rate of reaction is d[P]/dt = k[X]. 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)

JEE Advanced 2021 JEE Advanced

A The rate constant, k, of the reaction is 13.86 × 10^-4 s^-1.

B Half-life of X is 50 s.

C At 50 s, -d[X]/dt = 13.86 × 10^-3 mol L^-1 s^-1.

D At 100 s, d[Y]/dt = 3.46 × 10^-3 mol L^-1 s^-1.

View Solution

2. In the decay sequence: ²³⁸U → [-α] ²³⁴Th → [-β] ²³⁴Pa → [-α] ²³⁴Z → [-α] ²³⁰Th U, Th, Pa, and Z are particles/radiation emitted by the respective isotopes. The correct option(s) is(are)

JEE Advanced 2016 JEE Advanced

A Z will deflect towards negatively charged plate.

B Z is β.

C Z is γ.

D Z is an isotope of uranium.

View Solution

3. 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

JEE Advanced 2014 JEE Advanced

A 4

B 3

C 2

D 1

View Solution

4. Consider the chemical reaction, N₂(g) + 3H₂(g) → 2NH₃(g). The rate of this reaction can be expressed in terms of time derivatives of concentration of N₂(g), H₂(g) or NH₃(g). Identify the correct relationship amongst the rate expressions.

JEE Advanced 2002 JEE Advanced

A Rate = -d[N₂]/dt = ⅓ d[H₂]/dt = ½ d[NH₃]/dt

B Rate = -d[N₂]/dt = -3 d[H₂]/dt = 2 d[NH₃]/dt

C Rate = -d[N₂]/dt = -⅓ d[H₂]/dt = ½ d[NH₃]/dt

D Rate = -d[N₂]/dt = -d[H₂]/dt = d[NH₃]/dt

View Solution

5. Consider the following reaction: 2H₂(g) + 2NO(g) → N₂(g) + 2H₂O(g) which follows the mechanism given below: 2NO(g) ⇌ N₂O₂(g) (fast equilibrium) N₂O₂(g) + H₂(g) → N₂O(g) + H₂O (slow reaction) N₂O(g) + H₂(g) → N₂(g) + H₂O (fast reaction) The order of the reaction is

JEE Advanced 2004 JEE Advanced

View Solution

JEE Advanced 2025 Chapter-Wise Weightage For Chemistry

Chapter Name	Approx. Weightage (%)	No. of Expected Questions
Chemical Thermodynamics	6–8%	2
Atomic Structure	5%	1–2
Chemical Bonding & Molecular Structure	6–7%	2
Equilibrium (Ionic + Chemical)	7–9%	2–3
Electrochemistry	5–6%	1–2
Solutions & Colligative Properties	4–5%	1–2
Redox Reactions	3%	1
Surface Chemistry	3%	1
Solid State	3–4%	1
Kinetics	5–6%	1–2
Organic Chemistry (General + Named Reactions)	12–14%	4–5
Biomolecules, Polymers, Chemistry in Everyday Life	4–5%	1–2
Coordination Compounds	6–7%	2
The d- and f-Block Elements	5%	1–2
Qualitative Inorganic Analysis	4%	1

JEE Advanced 2025 Difficulty Analysis For Chemistry

Chapter Name	Difficulty Level (Easy / Moderate / Hard)
Chemical Thermodynamics	Moderate to Hard
Atomic Structure	Moderate
Chemical Bonding	Moderate
Equilibrium	Hard
Electrochemistry	Hard
Solutions	Moderate
Redox Reactions	Easy
Surface Chemistry	Easy
Solid State	Moderate
Chemical Kinetics	Moderate
Organic Chemistry (Full)	Moderate to Hard
Biomolecules & Polymers	Easy
Coordination Compounds	Hard
d- and f-Block Elements	Moderate
Inorganic Qualitative Analysis	Hard

Download Last 10 years JEE Advanced Previous Year Question Papers (2024 - 2016)

IIIT JEE Advanced Previous Year Question Papers

You can download free IIT JEE Advanced Previous Year Question Paper PDFs from the table provided below:-

JEE Advanced Paper Name	Question Paper Link
JEE Advanced 2024 Question Paper PDF	Click Here
JEE Advanced 2023 Question Paper PDF	Click Here
JEE Advanced 2022 Question Paper PDF	Click Here
JEE Advanced 2021 Question Paper PDF	Click Here
JEE Advanced 2020 Question Paper PDF	Click Here
JEE Advanced 2019 Question Paper PDF	Click Here
JEE Advanced 2018 Question Paper PDF	Click Here
JEE Advanced 2017 Question Paper PDF	Click Here
JEE Advanced 2016 Question Paper PDF	Click Here

Frequently Asked Questions:-

1. Is chemical kinetics tough for jee?

Chemical Kinetics is not particularly difficult for JEE Advanced. Although conceptual understanding may prove to be tough, subjects such as rate laws, the Arrhenius equation, and influence on reaction rates are easy to grasp with practice and proper knowledge.

2. Which subject is most important for JEE Advanced?

For JEE Advanced, all three subjects—Physics, Chemistry, and Mathematics—are equally important. But if you want to find high-weightage topics, Physical Chemistry, i.e., Chemical Thermodynamics, Chemical Kinetics, and Organic Chemistry, are important in increasing your score.

3. Can I skip physical chemistry for JEE Advanced?

Skipping Physical Chemistry for JEE Advanced is not recommended since it is a major component of the syllabus and it is necessary for good scoring, particularly in parts such as Chemical Kinetics, Thermodynamics, and Electrochemistry.

4. Who is the best chemistry teacher for IIT JEE Advanced?

The topmost chemistry teacher for JEE Advanced varies according to individuals' choice, teaching methodology, and geographical location. Some top names among JEE coaches are names such as Dr. B. P. Pandey, Ramesh Batlish, and N. A. Jindal. Students must search for teachers who clear the doubts with clearcut explanations and interactive sessions.

Chemical Kinetics: JEE Advanced Previous Year Questions with Solutions and weightage

JEE Advanced 2025 Chapter-Wise Weightage For Chemistry

JEE Advanced 2025 Difficulty Analysis For Chemistry

Download Last 10 years JEE Advanced Previous Year Question Papers (2024 - 2016)

IIIT JEE Advanced Previous Year Question Papers

Frequently Asked Questions:-

JEE Advanced Questions

1.
For a first order reaction, $A\rightarrow P$, the temperature $(T)$ dependent rate constant $(k)$ was found to follow the equation: $log\, k= (-2000)\frac {1}{T}+6.0$. The pre-exponential factor $A$ and the activation energy $E_a$, respectively, are

2.
In the decay sequence, ${^{238}_{92}U->[-x_1] ^{234}_{90}Th->[-x_2] ^{234}_{91}Pa ->[-x_3]^{234}Z->[^{-x_4}] ^{230}_{90}Th}$ $x_1,x_2, x_3$ and $x_4$ are particles/radiation emitted by the respective isotopes. The correct option(s) is(are)

3.
Plots showing the variation of the rate constant $(k)$ with temperature $(T)$ are given below. The plot that follows Arrhenius equation is

4.
The following statement (s) is are correct

5.
If I is the intensity of absorbed light and C is the concentration of AB for the photochemical process.$AB + hv\rightarrow$ AB, for the rate of formation of AB is directly proportional to

6.
For the first order reaction,

Comments

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JEE Advanced 2025 Chapter-Wise Weightage For Chemistry

JEE Advanced 2025 Difficulty Analysis For Chemistry

Download Last 10 years JEE Advanced Previous Year Question Papers (2024 - 2016)

IIIT JEE Advanced Previous Year Question Papers

Frequently Asked Questions:-

JEE Advanced Questions

1.For a first order reaction, $A\rightarrow P$, the temperature $(T)$ dependent rate constant $(k)$ was found to follow the equation: $log\, k= (-2000)\frac {1}{T}+6.0$. The pre-exponential factor $A$ and the activation energy $E_a$, respectively, are

2.In the decay sequence, ${^{238}_{92}U->[-x_1] ^{234}_{90}Th->[-x_2] ^{234}_{91}Pa ->[-x_3]^{234}Z->[^{-x_4}] ^{230}_{90}Th}$ $x_1,x_2, x_3$ and $x_4$ are particles/radiation emitted by the respective isotopes. The correct option(s) is(are)

3.Plots showing the variation of the rate constant $(k)$ with temperature $(T)$ are given below. The plot that follows Arrhenius equation is

4.The following statement (s) is are correct

5.If I is the intensity of absorbed light and C is the concentration of AB for the photochemical process.$AB + hv\rightarrow$ AB, for the rate of formation of AB is directly proportional to

6.For the first order reaction,

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
For a first order reaction, $A\rightarrow P$, the temperature $(T)$ dependent rate constant $(k)$ was found to follow the equation: $log\, k= (-2000)\frac {1}{T}+6.0$. The pre-exponential factor $A$ and the activation energy $E_a$, respectively, are

2.
In the decay sequence, ${^{238}_{92}U->[-x_1] ^{234}_{90}Th->[-x_2] ^{234}_{91}Pa ->[-x_3]^{234}Z->[^{-x_4}] ^{230}_{90}Th}$ $x_1,x_2, x_3$ and $x_4$ are particles/radiation emitted by the respective isotopes. The correct option(s) is(are)

3.
Plots showing the variation of the rate constant $(k)$ with temperature $(T)$ are given below. The plot that follows Arrhenius equation is

4.
The following statement (s) is are correct

5.
If I is the intensity of absorbed light and C is the concentration of AB for the photochemical process.$AB + hv\rightarrow$ AB, for the rate of formation of AB is directly proportional to

6.
For the first order reaction,