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Chemistry - Chemical Kinetics

Practise 8 IAT (IISER) previous year questions on Chemical Kinetics, compiled from papers spanning 2017 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 IAT (IISER) tests.

Chemical Kinetics has been asked in 6 of the 9 years of IAT (IISER) papers analysed (2017–2026), with 8 questions in all. 13% of them were easy, 75% moderate and 13% tough. Most of its questions came from 2021, with 2 questions that year. In the last three years (2023–2026) it had 2 questions across 3 papers, about 0.7 per paper.

The chapter's 3 topics are not weighted equally: Arrhenius theory (3 questions, 38%), Integrated rate laws (3 questions, 38%), and Rate law and rate constant (2 questions, 25%) have been asked the most. Over the last five years the most frequent topics have been Rate law and rate constant (1), Arrhenius theory (1), and Integrated rate laws (1). Arrhenius theory has produced the most tough questions (1).

  1. 1The rate constant of a reaction at 600 K with an activation energy of kJ mol is s . What is the temperature at which the half-life of the re2026Arrhenius theory
  2. 2At a particular temperature, the magnitude of the rate constant of a reaction is and the unit of the pre-exponential factor of the Arrhenius2025Rate law and rate constant
  3. 3For a reaction with a rate constant of , which one of the following plots is correct? (Given is the initial concentration of and is the conc2024Integrated rate laws
  4. 4Which of the following statements is INCORRECT?2021Integrated rate laws
  5. 5Based on the relative stabilities and barriers, which among the following schematic energy diagrams would best correspond to the reaction sc2021Arrhenius theory
  6. 6A first-order reaction is found to have a half-life of one second (sec). What will be the time required for 99.9 \% completion of the reacti2020Integrated rate laws
  7. 7Using the Arrhenius equation, find out the value of at ?2019Arrhenius theory
  8. 8Reactant gives different products in parallel first order reactions. Rate constant for the formation of any product is where . For the decay2017Rate law and rate constant

Frequently Asked Questions

1.How many questions are available for Chemical Kinetics?

This chapter includes 8 questions compiled from IAT (IISER) papers spanning 2017 to 2026.

2.Are these questions only from IAT (IISER), or from other exams too?

These are IAT (IISER) 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 IAT (IISER) Chemistry?

Chemical Kinetics has appeared in 7 of the 10 years of IAT (IISER) papers covered here, with 8 questions across 7 papers - about one per paper it appears in.

4.What is the difficulty level of Chemical Kinetics questions in IAT (IISER)?

Of the 8 questions analysed for this chapter, 13% are easy, 75% moderate and 13% tough. 2021 had the most, with 2 questions.

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

These topics have carried the most weightage in Chemical Kinetics:

  • Arrhenius theory - 3 questions (38%)
  • Integrated rate laws - 3 questions (38%)
  • Rate law and rate constant - 2 questions (25%)
  • Arrhenius theory has produced the most tough questions (1).
6.Is Chemical Kinetics's weightage in IAT (IISER) going up or down?

Across all 7 papers analysed, Chemical Kinetics has averaged about 1.1 questions per paper. In the last three years (2023–2026), that average has fallen, at about 0.7 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.