JEE Chemistry

Integrated Rate Laws: JEE Questions & Solutions

27 previous-year JEE Chemistry questions on Integrated Rate Laws, each with a worked step-by-step solution.

Advanced

Previous-year questions

  1. 01Decomposition of A is a first order reaction at T(K) and is given by A(g) → B(g) + C(g). In a closed 1 L vessel, 1 bar A(g) is allowed to…MCQMediumJEE 2026
  2. 02For the thermal decomposition of reactant AB(g), the following plot is constructed. The half life of the reaction is 'x' min. x = min.…NVAMediumJEE 2026
  3. 03An organic compound undergoes first order decomposition. The time taken for decomposition to 1/8 and 1/10 of its initial concentration are…MCQEasyJEE 2026
  4. 04For the thermal decomposition of N₂O₅(g) at constant volume, the following table can be formed, for the reaction mentioned below: 2N₂O₅(g)…NVAMediumJEE 2025
  5. 05Given below are two statements: Statement (I): Statement (II): In light of the above statements, choose the correct answer from the options…MCQMediumJEE 2025
  6. 06For a given reaction R → P, t_(1/2) is related to [A]₀ as given in the table: | [A]₀ / mol L⁻¹ | t_(1/2) / min | |---|---| | 0.100 | 200 |…MCQMediumJEE 2025
  7. 07Drug X becomes ineffective after 50% decomposition. The original concentration of drug in a bottle was 16 mg/mL which becomes 4 mg/mL in 12…MCQEasyJEE 2025
  8. 08For the reaction A → products, the half-life t_(1/2) varies with the initial concentration [A]₀ as shown in the graph below. The reaction…NVAMediumJEE 2025
  9. 09In a reaction A + B → C, initial concentrations of A and B are related as [A]₀ = 8[B]₀. The half lives of A and B are 10 min and 40 min,…MCQMediumJEE 2025
  10. 10Half-life of zero-order reaction A → product is 1 hour, when initial concentration of reaction is 2.0 mol L⁻¹. The time required to…MCQEasyJEE 2025
  11. 11Reaction A(g) → 2B(g) + C(g) is a first-order reaction. It was started with pure A. The following table shows the pressure of the system at…MCQMediumJEE 2025
  12. 12A(g) → B(g) + C(g) is a first order reaction. | Time | t | ∞ | | --- | --- | --- | | P_system | P_t | P_∞ | The reaction was started with…MCQMediumJEE 2025
  13. 13In a first order decomposition reaction, the time taken for the decomposition of reactant to one fourth and one eighth of its initial…MCQEasyJEE 2025
  14. 14Time required for completion of 99.9% of a first-order reaction is x times the half life (t_(1/2)) of the reaction. The value of x is:NVAEasyJEE 2024
  15. 15The half-life of radioisotopic bromine-82 is 36 hours. The fraction that remains after one day is:MCQEasyJEE 2024
  16. 16The rate of a first-order reaction is 0.04 mol L⁻¹ s⁻¹ at 10 minutes and 0.03 mol L⁻¹ s⁻¹ at 20 minutes after initiation. The half-life of…NVAMediumJEE 2024
  17. 17Integrated rate law equation for a first order gas phase reaction is given by (where Pᵢ is initial pressure and P_t is total pressure at…MCQMediumJEE 2024
  18. 18Consider the following first-order gas-phase reaction at constant temperature: A(g) → 2B(g) + C(g) If the total pressure of the gases is…NVAMediumJEE 2024
  19. 19For the first-order reaction A → B, the half-life is 30 min. The time taken for 75% completion of the reaction is min (Nearest integer).NVAEasyJEE 2023
  20. 20A first order reaction has the rate constant, k = 4.6 × 10⁻³ s⁻¹. The number of correct statement/s from the following is/are A. Reaction…NVAMediumJEE 2023
  21. 21If compound A reacts with B following first-order kinetics with rate constant 2.011 × 10⁻³ s⁻¹, the time taken by A (in seconds) to reduce…NVAEasyJEE 2023
  22. 22An organic compound undergoes first order decomposition. If the time taken for the 60% decomposition is 540 s, then the time required for…NVAMediumJEE 2023
  23. 23The rate constant for a first order reaction is 20 min⁻¹. The time required for the initial concentration of the reactant to reduce to its…NVAEasyJEE 2023
  24. 24A and B are two substances undergoing radioactive decay in a container. The half-life of A is 15 min and that of B is 5 min. If the initial…NVAMediumJEE 2023
  25. 25A → B The above reaction is of zero order. Half life of this reaction is 50 min. The time taken for the concentration of A to reduce to…NVAEasyJEE 2023
  26. 26A molecule undergoes two independent first-order reactions whose respective half-lives are 12 min and 3 min. If both reactions are…NVAEasyJEE 2023
  27. 27A(g) → 2B(g) + C(g) is a first order reaction. The initial pressure of the system was found to be 800 mm Hg, which increased to 1600 mm Hg…NVAMediumJEE 2023

Frequently asked questions

Our bank has 27 previous-year JEE Chemistry questions tagged to Integrated Rate Laws, drawn from JEE papers between 2023 and 2026, including 3 from 2026 alone. Each comes with a full step-by-step solution.

Integrated Rate Laws is rated Advanced overall for JEE Chemistry. The PYQs on this page break down as 16 medium, 11 easy.

Of the 27 previous-year questions on Integrated Rate Laws, 12 are multiple-choice (MCQ) and 15 are numerical-value (NVA) questions.

Based on recent paper analysis, Integrated Rate Laws is worth about 2 marks in JEE Main. It sits in Chemical Kinetics, a Class 12 Chemistry chapter.

More Chemical Kinetics topics

Arrhenius Equation & Activation Energy15Rate of Reaction13Order & Molecularity8Collision Theory0

Master Integrated Rate Laws with AI-adaptive practice.

Practice unlimited Integrated Rate Laws questions, track your mastery, and get every step explained by an AI tutor.

Start free trial