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Chemistry - Chemical Kinetics

Practise 62 KCET previous year questions on Chemical Kinetics, compiled from papers spanning 2007 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 KCET tests.

Chemical Kinetics has been asked in 19 of the 20 years of KCET papers analysed (2007–2026), with 62 questions in all. 42% of them were easy, 45% moderate and 13% tough. Most of its questions came from 2026, with 4 questions that year. In the last three years (2024–2026) it had 12 questions across 3 papers, about 4 per paper.

The chapter's 6 topics are not weighted equally: Integrated rate laws (19 questions, 31%), Arrhenius theory (17 questions, 27%), and Rate law and rate constant (12 questions, 19%) have been asked the most. Over the last five years the most frequent topics have been Arrhenius theory (8), Integrated rate laws (6), and Rate law and rate constant (3). Integrated rate laws has produced the most tough questions (3).

  1. 1Which one of the following graph is not applicable for a 1st order reaction ( )?2026Integrated rate laws
  2. 2For a reaction having three steps, the overall rate constant is . The values of and (activation energies stepwise) are , and kJ mol respecti2026Arrhenius theory
  3. 3For a 1st order change , the concentration of Reactant R changes from M to M in minutes. The rate of reaction when the concentration of R is2026Integrated rate laws
  4. 4The activation energy for the reaction is . The change in enthalpy for the above reaction is . Then the activation energy for is2026Arrhenius theory
  5. 5Catalysts are used to increase the rate of a chemical reaction. Because it2025Arrhenius theory
  6. 6Half-life of a first order reaction is 20 seconds and initial concentration of reactant is 0.2 M . The concentration of reactant left after 2025Integrated rate laws
  7. 7In the given graph, for the reverse reaction will be2025Arrhenius theory
  8. 8For the reaction initial concentration of is and after 300 , it is reduced to . The rate of production of in ) is2025Rate of reaction
  9. 9For the reaction, and . When a catalyst is added decreases by . What is the for the backward reaction in the presence of catalyst?2024Arrhenius theory
  10. 10For the reaction, , rate and rate constant are and respectively at a given instant. The molar concentration of at that instant is2024Rate law and rate constant
  11. 11Which one of the following does not represent Arrhenius equation?2024Arrhenius theory
  12. 12The synthetically produced radioactive noble gas by the collision of with is2024Parallel and Sequencial rate laws
  13. 13In which one of the following reactions, rate constant has the unit ?2023Rate law and rate constant
  14. 14For a reaction, the value of rate constant at is . The value of Arrhenius factor at infinitely high temperature is2023Arrhenius theory
  15. 15The rate constant and for two different reactions are and respectively. The temperature at which is2023Arrhenius theory
  16. 16For th order of reaction, half-life period is directly proportional to2022Integrated rate laws
  17. 17Half-life of a reaction is found to be inversely proportional to the fifth power of its initial concentration, the order of reaction is2022Integrated rate laws
  18. 18A first order reaction is half completed in . How long does it need of the reaction to be completed ?2022Integrated rate laws
  19. 19The rate of the reaction, is given by the equation, rate . If concentration is expressed in , the unit of is2022Rate law and rate constant
  20. 20For a reaction, Products, when concentration of alone is increased half-life remains the same. If concentration of alone is doubled, rate re2021Rate law and rate constant
  21. 21If the rate constant for a first order reaction is , the time required for the completion of of the reaction is given by2021Integrated rate laws
  22. 22The rate of a gaseous reaction is given by the expression . If the volume of vessel is reduced to one half of the initial volume, the reacti2021Rate law and rate constant
  23. 23Higher order reactions are rare due to2021Rate of reaction
  24. 24The time required for completion of a first order reaction is . The time required for completion of the same reaction will be2020Integrated rate laws
  25. 25For an elementary reaction the rate of appearance of at time ' ' is . Rate of disappearance of at ' '. will be2020Rate of reaction
  26. 26The rate constant of a reaction is given by under standard notation. In order to speed up the reaction, which of the following factors has t2020Arrhenius theory
  27. 27The plot of \( t_{1 / 2} {v} / {s}[R]_{0} \) for a reaction is a straight-line parallel to \( {x} \)-axis. The unit for the rate constant of2019Rate law and rate constant
  28. 28Which is a wrong statement?2019Arrhenius theory
  29. 29\( 1 {~L} \) of \( 2 {M} {CH}_{3} {COOH} \) is mixed with \( 1 {~L} \) of \( 3 {M} {C}_{2} {H}_{5} {OH} \) to form an ester. The rate of the2019Rate of reaction
  30. 30The value of rate constant of a pseudo first order reaction2018Rate law and rate constant
  31. 31For the reaction, \( 2 {SO}_{2}+ {O}_{2} 2 {SO}_{3} \), the rate of disappearance of \( {O}_{2} \) is \( 2 10^{-4} {~mol} {~L}^{-1} {~s}^{-12018Rate of reaction
  32. 32The temperature coefficient of a reaction is \( 2 \). When the temperature is increased from \( 30^{ } {C} \) to \( 90^{ } {C} \), the rate 2018Rate of reaction
  33. 33Which one of the following is not a common component of photo-chemical smog?2017Rate of reaction
  34. 34Which of the following crystal has unit cell such that \( {a} {b} {c} \) and \( {V} 90^{ } ? \)2017Rate law and rate constant
  35. 35When the pure solvent diffuses out of the solution through the semi-permeable membrane then the process is called2017Arrhenius theory
  36. 36By passing electric current, \( {NaClO}_{3} \) is converted into \( {NaClO}_{4} \) according to the following equation \( {NaClO}_{3}+ {H}_{2017Arrhenius theory
  37. 37The half-life period of a \( 1^{s t} \) order reaction is \( 60 \) minutes. What percentage will be left over after \( 240 \) minutes?2016Integrated rate laws
  38. 38For a chemical reaction, \( {mA} {xB} \), the rate law is \( r=k[ {~A}]^{2} \). If the concentration of \( A \) is doubled, the reaction rat2016Rate law and rate constant
  39. 39\( 3 {~A} 2 {~B} \), rate of reaction \( + {d[B]}{d t} \) is equal to2016Rate of reaction
  40. 40The activation energy of a chemical reaction can be determined by,2016Arrhenius theory
  41. 41In a first order reaction, the concentration of the reactant is reduced to \( 12.5 \% \) in one hour. When was it half completed?2015Integrated rate laws
  42. 42Half life period of a first order reaction is \( 10 {~min} \). Starting with initial concentration \( 12 {M} \), the rate after \( 20 {~min}2015Integrated rate laws
  43. 43\( 100 {~cm}^{3} \) of \( 1 {M} {CH}_{3} {COOH} \) was mixed with \( 100 {~cm}^{3} \) of \( 2 {MCH}_{3} {OH} \) to form an ester. The change2015Rate law and rate constant
  44. 44An incorrect statement with respect to \( S_{N} 1 \) and \( S_{N} 2 \) mechanisms for alkyl halide is - oxamsnet copp2014Arrhenius theory
  45. 45Among the elements from atomic number \( 1 \) to \( 36 \),the number of elements which have an unpaired electron in their s-subshell is2014Integrated rate laws
  46. 46If of the reactant is converted into a product in a first order reaction in , how much of it would react in ?2013Integrated rate laws
  47. 47The rate of reaction increases with rise in temperature because of2013Rate of reaction
  48. 48Temperature coefficient of a reaction is 2 . When temperature is increased from to , the rate of reaction is increased by2013Rate of reaction
  49. 49For a reaction, products, the rate of the reaction at various concentrations are given below The rate law for the above reaction is2012Methods to determine order of reaction
  50. 50A first order reaction is complete in 20 minutes. How long will the reaction take to be complete?2012Integrated rate laws

Frequently Asked Questions

1.How many questions are available for Chemical Kinetics?

This chapter includes 62 questions compiled from KCET papers spanning 2007 to 2026.

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

These are KCET 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 KCET Chemistry?

Chemical Kinetics has appeared in 19 of the 20 years of KCET papers covered here, with 62 questions across 19 papers - about 3 per paper it appears in.

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

Of the 62 questions analysed for this chapter, 42% are easy, 45% moderate and 13% tough. 2026 had the most, with 4 questions.

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

These topics have carried the most weightage in Chemical Kinetics:

  • Integrated rate laws - 19 questions (31%)
  • Arrhenius theory - 17 questions (27%)
  • Rate law and rate constant - 12 questions (19%)
  • Integrated rate laws has produced the most tough questions (3).
6.Is Chemical Kinetics's weightage in KCET going up or down?

Across all 19 papers analysed, Chemical Kinetics has averaged about 3.3 questions per paper. In the last three years (2024–2026), that average has risen, at about 4.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.