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Chemistry - Chemical Kinetics

Practise 33 BITSAT previous year questions on Chemical Kinetics, compiled from papers spanning 2009 to 2024. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty BITSAT tests.

Chemical Kinetics has been asked in 15 of the 16 years of BITSAT papers analysed (2009–2024), with 33 questions in all. 48% of them were easy, 27% moderate and 24% tough. Most of its questions came from 2024, with 6 questions that year. In the last three years (2022–2024) it had 8 questions across 5 papers, about 1.6 per paper.

The chapter's 5 topics are not weighted equally: Rate law and rate constant (13 questions, 39%), Integrated rate laws (8 questions, 24%), and Arrhenius theory (6 questions, 18%) have been asked the most. Over the last five years the most frequent topics have been Integrated rate laws (4), Rate law and rate constant (3), and Arrhenius theory (2). Rate law and rate constant has produced the most tough questions (4).

  1. 1In the reaction, products, If the concentration of the reactant is doubled rate of the reaction remains unchanged. The order of the reaction2024 (Memory Based Paper 1)Rate law and rate constant
  2. 2In a first order reaction, the concentration of the reactant, decreases from 0.8 M to 0.4 M in 15 minutes. The time taken for the concentrat2024 (Memory Based Paper 1)Integrated rate laws
  3. 3In the chemical reaction , what is the order of the reaction? Given that, the rate of reaction doubles if the concentration of is increased 2024 (Memory Based Paper 2)Rate law and rate constant
  4. 4Calculate the activation energy of a reaction, whose rate constant doubles on raising the temperature from 300 K to 600 K .2024 (Memory Based Paper 2)Arrhenius theory
  5. 5For the reaction , the rate of disappearance of is . The rate appearance of is2024 (Memory Based Paper 3)Rate of reaction
  6. 6If for a first order reaction, the value of and are and respectively, then at what temperature will its half life period be 10 minutes?2024 (Memory Based Paper 3)Integrated rate laws
  7. 7Plots showing the variation of the rate constant with temperature are given below. The plot that follows Arrhenius equation is2023 (Memory Based Paper 1)Arrhenius theory
  8. 8For the decomposition of azomethane, a first order reaction, the variation in partial pressure with time at is given as The half life of the2023 (Memory Based Paper 2)Integrated rate laws
  9. 9In a 1 st order reaction, reactant concentration varies with time as :2021Rate law and rate constant
  10. 10of gas effuses through a hole in a container in 5 seconds. The time taken for the effusion of the same volume of the gas specified below und2021Rate of reaction
  11. 11A radioactive isotope having a half - life period of 3 days was received after 12 days. If of the isotope is left in the container, what wou2020Integrated rate laws
  12. 12Given the hypothetical reaction mechanism A I B II C III D IV E and the rate as Species formed Rate of its information B 0 . 002 mol / h per2019Rate law and rate constant
  13. 13For the chemical reaction 2 O 3 3 O 2 , the reaction proceeds as follows O 3 O 2 + O (Fast) O + O 3 2 O 2 , (Slow) the rate law expression s2019Rate law and rate constant
  14. 14For a reversible reaction, A B , which one of the following statement is wrong from the given energy profile diagram?2019Arrhenius theory
  15. 15Under the same reaction conditions, initial concentration of 1 . 386 mol dm - 3 of a substance becomes half in 40 s and 20 s through first o2018Rate law and rate constant
  16. 16The rate of a reaction triples when temperature changes from 20 0 C to 50 0 C . The energy of activation for the reaction is R = 8 . 314 JK 2018Rate law and rate constant
  17. 17Which of the following expression is correct for the rate of reaction given below ? 5 Br - aq + BrO 3 - aq + 6 H + aq 3 Br 2 aq + 3 H 2 O l2018Rate law and rate constant
  18. 18For an endothermic reaction, where H represent the enthalpy of reaction in kJ mol - 1 , the minimum value for energy of activation (for forw2017Arrhenius theory
  19. 19A graph is plotted between log K versus 1 T for calculation of activation energy E a . The correct plot is2017Arrhenius theory
  20. 20Consider the reaction : The rate equation for this reaction is rate Which of these mechanisms is/are consistent with this rate equation? A. 2016Rate law and rate constant
  21. 21In the reaction, The time taken for reaction of is twice the time taken for reaction of . The concentration of varies with reaction time as 2016Integrated rate laws
  22. 22The unit of rate constant for reactions of second order is2015Rate law and rate constant
  23. 23In a first order reaction with time the concentration of the reactant decreases2015Integrated rate laws
  24. 24The reduction of peroxydisulphate ion by I ion is expressed by . If rate of disappearance of is lit what is the rate of formation of during 2014Rate of reaction
  25. 25A gaseous reaction There is increase in pressure from to 120 in 5 minutes. The rate of disappearance of is2014Rate of reaction
  26. 26Two substances and decompose in solution independently, both following first order kinetics. The rate constant of is twice that of . In an e2014Integrated rate laws
  27. 27Velocity constant of a reaction at was found to be . At it will be2013Rate of reaction
  28. 28At high pressure, the entire surface gets covered by a monomolecular layer of the gas follows2013Rate law and rate constant
  29. 29If rate and rate constant for above reaction are and respectively, then calculate the concentration of2012Integrated rate laws
  30. 30During the kinetic study of the reaction, , following results were obtained: Based on the above data which one of the following is correct?2011Rate law and rate constant
  31. 31The activation energy for a simple chemical reaction is in forward direction. The activation energy for reverse reaction2010Arrhenius theory
  32. 32The following data are for the decomposition of ammonium nitrite in aqueous solution : The order of reaction is:2010Rate law and rate constant
  33. 33The chemical reaction proceeds as follows: rate law expression should be:2009Parallel and Sequencial rate laws

Frequently Asked Questions

1.How many questions are available for Chemical Kinetics?

This chapter includes 33 questions compiled from BITSAT papers spanning 2009 to 2024.

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

These are BITSAT 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 BITSAT Chemistry?

Chemical Kinetics has appeared in 15 of the 16 years of BITSAT papers covered here, with 33 questions across 18 papers - about 2 per paper it appears in.

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

Of the 33 questions analysed for this chapter, 48% are easy, 27% moderate and 24% tough. 2024 had the most, with 6 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 - 13 questions (39%)
  • Integrated rate laws - 8 questions (24%)
  • Arrhenius theory - 6 questions (18%)
  • Rate law and rate constant has produced the most tough questions (4).
6.Is Chemical Kinetics's weightage in BITSAT going up or down?

Across all 18 papers analysed, Chemical Kinetics has averaged about 1.8 questions per paper. In the last three years (2022–2024), that average has stayed about the same, at about 1.6 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.