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Chemistry - Chemical Kinetics

Practise 41 AIIMS previous year questions on Chemical Kinetics, compiled from papers spanning 2001 to 2019. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty AIIMS tests.

Chemical Kinetics has been asked in 18 of the 19 years of AIIMS papers analysed (2001–2019), with 41 questions in all. 44% of them were easy, 41% moderate and 15% tough. Most of its questions came from 2019, with 5 questions that year. In the last three years (2017–2019) it had 9 questions across 5 papers, about 1.8 per paper.

The chapter's 5 topics are not weighted equally: Integrated rate laws (16 questions, 39%), Rate law and rate constant (11 questions, 27%), and Rate of reaction (5 questions, 12%) have been asked the most. Integrated rate laws has produced the most tough questions (2).

  1. 1What is the activation energy for a reaction if its rate constant doubles when the temperature is raised from to ?26 May, 2019Arrhenius theory
  2. 2For a first order gas phase reaction, be initial pressure of and the total pressure at time ' '. Integrated rate equation is25 May, 2019Integrated rate laws
  3. 3Find out the time required for completion of a first order reaction, if the value of rate constant is .25 May, 2019Rate law and rate constant
  4. 4The decomposition of on platinum surface is zero order reaction. The rates of production of and are respectively25 May, 2019Rate of reaction
  5. 5Assertion : Half-life period of a reaction of first order is independent of initial concentration. Reason : Half-life period for a first ord25 May, 2019Integrated rate laws
  6. 6Which option is valid for a zero order reaction?27 May, 2018Integrated rate laws
  7. 7If energy of activation of the reaction is and the temperature changes from to then the value of is26 May, 2018Arrhenius theory
  8. 8The chemical reaction, proceeds as follows : Step 1: .(fast) Step .(slow) The rate law expression should be2017Rate law and rate constant
  9. 9The temperature dependence of a reaction is represented by the Arrhenius equation : Which among the following is wrong conclusion about the 2017Arrhenius theory
  10. 10A first order reaction, which is complete in 30 minutes has a half-life period of2016Integrated rate laws
  11. 11During the decomposition of to give oxygen, is formed per minute at a certain point of time. The rate of formation of water at this point is2016Rate of reaction
  12. 12For reaction , when , the rate was found to be . On reducing concentration of to half, the rate changes to . The order of reaction with resp2015Rate law and rate constant
  13. 13In a decay process changes into . Which process is this?2015Integrated rate laws
  14. 14of a zero order reaction complete in of the same reaction completes in2014Integrated rate laws
  15. 15For the reaction , the rate constant is given as is initial pressure and is pressure at time )2014Integrated rate laws
  16. 16The plot of a concentration of the reactant versus time for a reaction is a straight line with a negative slope. The reaction follows a2013Methods to determine order of reaction
  17. 17For a reaction, then unit of rate of reaction and rate constant respectively is2012Rate law and rate constant
  18. 18If is a straight line graph then determine the order of reaction.2012Methods to determine order of reaction
  19. 19Assertion : Rate of reaction doubles when concentration of reactant is doubled if it is a first order reaction. Reason : Rate constant also 2012Integrated rate laws
  20. 20For a first order gas phase reaction- be initial pressure of and the total pressure at time ' '. Integrated rate equation is2011Integrated rate laws
  21. 21Assertion : Two different reactions can never have same rate of reaction. Reason : Rate of reaction always depends only on frequency of coll2011Arrhenius theory
  22. 22For a order reaction if concentration is doubled then rate of reaction becomes2010Integrated rate laws
  23. 23For a reaction , the graph of the product concentration versus time came out to be a straight line passing through the origin. Hence the gra2010Methods to determine order of reaction
  24. 24Assertion : The overall order of the reaction is the sum of the exponents of all the reactants in the rate expression. Reason : There are ma2010Rate law and rate constant
  25. 25Assertion : The position of an element in periodic table after emission of one - and two -particles remains unchanged. Reason : Emission of 2010Integrated rate laws
  26. 26In a homogenous reaction the initial pressure was and after time it was . Expression for rate constant in terms of , and will be2009Integrated rate laws
  27. 27Which curve corresponds to the temperature dependence of the rate of a simple one step reaction?2009Arrhenius theory
  28. 28Assertion : In rate law, unlike in the expression for equilibrium constants, the exponents for concentrations do not necessarily match the s2009Rate law and rate constant
  29. 29For the reaction, \(2 {NO}_2+ {F}_2 2 {NO}_2 {~F}\), following mechanism has been provided. \[ {aligned} & {NO}_2+ {F}_2 { { Slow }}{ } {NO}2008Rate law and rate constant
  30. 30Acid hydrolysis of sucrose is a2008Rate law and rate constant
  31. 31Decay constant of a radioactive substance is \(69.3 {~sec}^{-1}\), find \(t_{1 / 16}\) of the same substance.2007Integrated rate laws
  32. 32X-rays are emitted during2007Integrated rate laws
  33. 33Assertion : The kinetics of the reaction \(m A+n B+p C m^{ } X+n^{ } Y+p^{ } Z\) obeys the rate expression as - \( {d x}{d t}=k[A]^m[B]^n\) 2007Rate law and rate constant
  34. 34Assertion : The position of an element in periodic table after emission of one \( \) and two \( \)-particles remains unchanged. Reason : Emi2007Integrated rate laws
  35. 35For the reaction, rate of reaction is2006Rate of reaction
  36. 36Assertion : According to transition state theory, for the formation of an activated complex, one of the vibrational degrees of freedom is co2006Rate of reaction
  37. 37An endothermic reaction with high activation energy for the forward reaction is given by the diagram2005Rate of reaction
  38. 38For reaction , when , the rate was found to be . On reducing concentration of to half, the rate changes to . The order of reaction with resp2005Rate law and rate constant
  39. 39The rate constant , for the reaction is . Which equation given below describes the change of with time? and correspond to concentration of i2004Rate law and rate constant
  40. 40For the reaction : the order of reaction is2002Methods to determine order of reaction
  41. 41Assertion : Hydrogen nuclei combines to form helium nuclei then energy is released. Reason : Binding energy/nucleon of He is greater than hy2001Integrated rate laws

Frequently Asked Questions

1.How many questions are available for Chemical Kinetics?

This chapter includes 41 questions compiled from AIIMS papers spanning 2001 to 2019.

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

These are AIIMS questions specifically for the Chemical Kinetics chapter. Questions from other exams like NEET or JIPMER are organised separately under their respective exam sections.

3.Is Chemical Kinetics an important chapter for AIIMS Chemistry?

Chemical Kinetics has appeared in 18 of the 19 years of AIIMS papers covered here, with 41 questions across 20 papers - about 2 per paper it appears in.

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

Of the 41 questions analysed for this chapter, 44% are easy, 41% moderate and 15% tough. 2019 had the most, with 5 questions.

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

These topics have carried the most weightage in Chemical Kinetics:

  • Integrated rate laws - 16 questions (39%)
  • Rate law and rate constant - 11 questions (27%)
  • Rate of reaction - 5 questions (12%)
  • Integrated rate laws has produced the most tough questions (2).
6.Is Chemical Kinetics's weightage in AIIMS going up or down?

Across all 20 papers analysed, Chemical Kinetics has averaged about 2.0 questions per paper. In the last three years (2017–2019), that average has stayed about the same, at about 1.8 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.