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Chemistry - Chemical Kinetics

Practise 36 JEE Advanced previous year questions on Chemical Kinetics, compiled from papers spanning 2006 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty JEE Advanced tests.

Chemical Kinetics has been asked in 21 of the 27 years of JEE Advanced papers analysed (2000–2026), with 36 questions in all. 36% of them were easy, 50% moderate and 14% tough. Most of its questions came from 2019, with 3 questions that year. In the last three years (2024–2026) it had 5 questions across 6 papers, about 0.8 per paper.

The chapter's 6 topics are not weighted equally: Rate law and rate constant (10 questions, 28%), Integrated rate laws (10 questions, 28%), and Parallel and Sequencial rate laws (8 questions, 22%) have been asked the most. Rate law and rate constant has also led over the last five years, with 4 questions. Integrated rate laws has produced the most tough questions (3).

  1. 1For a reversible reaction , at constant temperature, both the forward and the backward reactions are first order elementary reactions with r2026 (Paper 1)Parallel and Sequencial rate laws
  2. 2For a first-order reaction at a given temperature, is the rate constant. For this reaction, at the given temperature, the concentrations of 2026 (Paper 2)Rate law and rate constant
  3. 3Consider a reaction Product. The rate of this reaction is measured to be . At the start of the reaction, the concentration of , is 10 -times2025 (Paper 2)Rate law and rate constant
  4. 4Consider the following reaction, which follows the mechanism given below: (fast equlibrium) (slow reaction) (fast reaction) The order of the2024 (Paper 1)Rate law and rate constant
  5. 5A sample initially contains only U-238 isotope of uranium. With time, some of the U-238 radioactively decays into while the rest of it remai2024 (Paper 2)Integrated rate laws
  6. 6The plot of logk f versus 1 T for a reversible reaction A ( g ) P ( g ) is shown. Pre-exponential factors for the forward and backward react2023 (Paper 1)Arrhenius theory
  7. 7Match the rate expressions in LIST-I for the decomposition of \( {X}\) with the corresponding profiles provided in LIST-II. \(X_s\) and \( {2022 (Paper 1)Rate law and rate constant
  8. 8For the following reaction 2 X + Y k 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 2021 (Paper 2)Rate law and rate constant
  9. 9U 92 238 is known to undergo radioactive decay to form Pb 82 206 by emitting alpha and bet a particles. A rock initially contained 68 10 - 62020 (Paper 1)Integrated rate laws
  10. 10Which of the following plots is(are) correct for the given reaction? ( [ P ] 0 is the initial concentration of P )2020 (Paper 2)Integrated rate laws
  11. 11In the decay sequence: U 92 238 - x 1 T h 90 234 - x 2 P a 91 234 - x 3 Z 234 - x 4 T h 90 234 x 1 , x 2 , x 3 and x 4 are the particles/ ra2019 (Paper 1)Integrated rate laws
  12. 12Consider the kinetic data given in the following table for the reaction A + B + C Product. Experiment No. A m o l d m - 3 B m o l d m - 3 C 2019 (Paper 1)Rate law and rate constant
  13. 13The decomposition reaction 2 N 2 O 5 g 2 N 2 O 4 g + O 2 g is started in a closed cylinder under the isothermal isochoric condition at an in2019 (Paper 2)Rate law and rate constant
  14. 14For a first order reaction A ( g ) 2 B ( g ) + C ( g ) at constant volume and 300 K, the total pressure at the beginning ( t = 0 ) and at ti2018 (Paper 2)Integrated rate laws
  15. 15Consider the following reversible reaction: A g + B g AB g The activation energy of the backward reaction exceeds that of the forward reacti2018 (Paper 2)Arrhenius theory
  16. 16In a bimolecular reaction, the steric factor P was experimentally determined to be 4 . 5 . The correct option(s) among the following is(are)2017 (Paper 2)Arrhenius theory
  17. 17A plot of the number of neutrons ( N ) against the number of protons ( P ) of the stable nuclei exhibits upwards deviation from linearity fo2016 (Paper 1)Integrated rate laws
  18. 18According to the Arrhenius equation,2016 (Paper 1)Arrhenius theory
  19. 19A closed vessel with rigid walls contains 1 mol of U 92 238 and 1 mol of air at 298 K. Considering complete decay of U 92 238 to P b 82 206 2015 (Paper 2)Integrated rate laws
  20. 20In dilute aqueous H 2 S O 4 , the complex diaquodioxalatoferrate (II) is oxidized by M n O 4 - . For this reaction, the ratio of the rate of2015 (Paper 2)Rate of reaction
  21. 21For the elementary reaction M N , the rate of disappearance of M increases by a factor of 8 upon doubling the concentration of M . The order2014 (Paper 2)Rate law and rate constant
  22. 22In 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 Q2013 (Paper 1)Rate law and rate constant
  23. 23In the nuclear transmutation 4 9 Be + X 4 8 Be + Y , identify X , Y .2013 (Paper 2)Parallel and Sequencial rate laws
  24. 24An organic compound undergoes first-order decomposition. The time taken for its decomposition to 8 and of its initial concentration are and 2012 (Paper 1)Integrated rate laws
  25. 25For the first order reaction2011 (Paper 2)Integrated rate laws
  26. 26Plots showing the variation of the rate constant with temperature are given below. The plot that follows Arrhenius equation is2010 (Paper 1)Arrhenius theory
  27. 27The concentration of in the reaction was measured as a function of time and the following data is obtained : The order of the reaction is2010 (Paper 1)Methods to determine order of reaction
  28. 28For a first order reaction, , the temperature dependent rate constant was found to follow the equation, The pre-exponential factor and the a2009 (Paper 2)Arrhenius theory
  29. 29The total number of and -particles emitted in the nuclear reaction is2009 (Paper 2)Parallel and Sequencial rate laws
  30. 30Under the same reaction conditions, initial concentration of of a substance becomes half in 40 s and 20 s through first-order and zero-order2008 (Paper 1)Integrated rate laws
  31. 31Statement compounds are stronger oxidising agents than compounds. Statement 2 The higher oxidation states for the group 14 elements are more2008 (Paper 1)Parallel and Sequencial rate laws
  32. 32A positron is emitted from . The ratio of the atomic mass and atomic number of the resulting nuclide is2007 (Paper 2)Parallel and Sequencial rate laws
  33. 33Consider a reaction products. When concentration of both the reactants and is doubled, the rate increases by eight times. However, when conc2007 (Paper 2)Rate law and rate constant
  34. 34Paragraph: Carbon-14 is used to determine the age of organic material. The procedure is based on the formation of by neutron capture in the 2006Parallel and Sequencial rate laws
  35. 35Paragraph: Carbon-14 is used to determine the age of organic material. The procedure is based on the formation of by neutron capture in the 2006Parallel and Sequencial rate laws
  36. 36Paragraph: Carbon-14 is used to determine the age of organic material. The procedure is based on the formation of by neutron capture in the 2006Parallel and Sequencial rate laws

Frequently Asked Questions

1.How many questions are available for Chemical Kinetics?

This chapter includes 36 questions compiled from JEE Advanced papers spanning 2006 to 2026.

2.Are these questions only from JEE Advanced, or from other exams too?

These are JEE Advanced questions specifically for the Chemical Kinetics chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Chemical Kinetics an important chapter for JEE Advanced Chemistry?

Chemical Kinetics has appeared in 21 of the 21 years of JEE Advanced papers covered here, with 36 questions across 26 papers - about one per paper it appears in.

4.What is the difficulty level of Chemical Kinetics questions in JEE Advanced?

Of the 36 questions analysed for this chapter, 36% are easy, 50% moderate and 14% tough. 2019 had the most, with 3 questions.

5.Which topics in Chemical Kinetics should I focus on?

These topics have carried the most weightage in Chemical Kinetics:

  • Rate law and rate constant - 10 questions (28%)
  • Integrated rate laws - 10 questions (28%)
  • Parallel and Sequencial rate laws - 8 questions (22%)
  • Integrated rate laws has produced the most tough questions (3).
6.Is Chemical Kinetics's weightage in JEE Advanced going up or down?

Across all 26 papers analysed, Chemical Kinetics has averaged about 1.4 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.8 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.