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Chemistry - Chemical Equilibrium

Practise 35 COMEDK previous year questions on Chemical Equilibrium, compiled from papers spanning 2012 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 COMEDK tests.

Chemical Equilibrium has been asked in 12 of the 15 years of COMEDK papers analysed (2012–2026), with 35 questions in all. 31% of them were easy, 51% moderate and 17% tough. Most of its questions came from 2025, with 4 questions that year. In the last three years (2024–2026) it had 11 questions across 8 papers, about 1.4 per paper.

The chapter's 2 topics are not weighted equally: Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application (27 questions, 77%) and Le chatelier's principle (8 questions, 23%) have been asked the most. Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application has also led over the last five years, with 15 questions. Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application has produced the most tough questions (6).

  1. 1Consider the gaseous equilibrium The expression relating the degree of dissociation ( ) and equilibrium constant ( ) and total pressure P is09 May, 2026 (S1)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  2. 2If the equilibrium constant for is 49 The equilibrium constant for the reaction is __________09 May, 2026 (S1)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  3. 3An equilibrium mixture taken in 2litre vessel of the reaction: has 4 moles of , 3moles of and 6moles of then the value of equilibrium consta09 May, 2026 (S2)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  4. 4For a reaction 2.0 moles of was placed in a one litre flask and the concentration of at equilibrium was found to be . The equilibrium consta25 May, 2025 (Shift)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  5. 5For the reaction , carried out at 298 K , the equilibrium constant was found to be 169 and the initial concentrations of all reactants and p10 May, 2025 (S2)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  6. 6Consider the reaction In accordance with Le-Chatlier's principle, which of the following will not disturbs the equilibrium?10 May, 2025 (S3)Le chatelier's principle
  7. 7For a reaction, 1.0 mole of mole of and 0.5 mole of were taken in a 1 L vessel. At equilibrium, the concentration of was . The equilibrium c10 May, 2025 (S3)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  8. 8on heating at a temperature above 1000 K, changes to . When is heated above 1000 K at an initial pressure of 1 atm, the partial pressure of 2024 (Afternoon Shift)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  9. 9At , the Equilibrium constant value for the formation of HI from and is . of is present at equilibrium. What will be the concentrations of a2024 (Evening Shift)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  10. 10In the equilibrium, , 6 mol of is taken in 10 L flask. If concentration of at equilibrium is , then concentration of at equilibrium is2024 (Memory Based)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  11. 11The equilibrium constant of given reaction is 100 . (gas) What is the equilibrium constant for the reaction given below?2024 (Memory Based)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  12. 12The equilibrium constants for the reactions , and are as given: a) b) c) What would be the Equilibrium constant for the reaction:2023 (Evening Shift)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  13. 13Consider the following equilibrium, Calculate for the reaction,2023 (Memory Based)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  14. 14Consider the following equilibrium, Calculate for the reaction,2023 (Morning Shift)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  15. 15For the reaction, the position of equilibrium can be shifted to the right by2022Le chatelier's principle
  16. 16The equilibrium constant, for is . If the equilil rium concentration of benzene is than what is the value of concentration of ethylene?2022Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  17. 17For the reaction . If inital pressure is and rate constant is . After the final pressure of will be2022Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  18. 18In the equilibrium, , if the equilibrium concentration of is double, then equilibrium concentration of will be2021Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  19. 19For the equilibrium, , the value of the equilibrium constant, is at . The value of for the reaction at this temperature will be2021Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  20. 20The value of for the phosphorylation of glucose in glycolysis is . The value of at is2021Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  21. 21In which one of the following equilibria, pressure has no effect2019Le chatelier's principle
  22. 22Just before attaining the chemical equilibrium2019Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  23. 23In the synthesis of ammonia2019Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  24. 24For the reaction, , the equilibrium constant depends upon2017Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  25. 25Heat. What is the effect of the increase of temperature on the equilibrium of the reaction?2017Le chatelier's principle
  26. 26of nitrogen and of hydrogen gas are heated in a closed vessel. At equilibrium of ammonia are present. The equilibrium number of moles of nit2016Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  27. 27In the manufacture of ammonia by the Haber's process, , which of the following conditions is unfavourable?2016Le chatelier's principle
  28. 28The chemical equilibrium of a reversible reaction is not influenced by2016Le chatelier's principle
  29. 29The compounds and are mixed in equimolar proportion to form the products, . At equilibrium, one-third of and are consume(d) The equilibrium 2016Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  30. 30In which of the following case, does the reaction go farthest to completion if2014Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  31. 31One mole of is heated in a closed vessel. At equilibrium is dissociated. Calculate the equilibrium constant.2014Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  32. 32The gaseous reaction is most favoured at2013Le chatelier's principle
  33. 33For a reaction, if , the forward reaction is favoured by2013Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  34. 34In a lime kiln, to get higher yield of , the measure that can be taken is2013Le chatelier's principle
  35. 35The initial concentrations of and are equal. At equilibrium, the concentration of is twice that of . The equilibrium constant of the reactio2012Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application

Frequently Asked Questions

1.How many questions are available for Chemical Equilibrium?

This chapter includes 35 questions compiled from COMEDK papers spanning 2012 to 2026.

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

These are COMEDK questions specifically for the Chemical Equilibrium chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Chemical Equilibrium an important chapter for COMEDK Chemistry?

Chemical Equilibrium has appeared in 12 of the 15 years of COMEDK papers covered here, with 35 questions across 19 papers - about 2 per paper it appears in.

4.What is the difficulty level of Chemical Equilibrium questions in COMEDK?

Of the 35 questions analysed for this chapter, 31% are easy, 51% moderate and 17% tough. 2025 had the most, with 4 questions.

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

These topics have carried the most weightage in Chemical Equilibrium:

  • Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application - 27 questions (77%)
  • Le chatelier's principle - 8 questions (23%)
  • Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application has produced the most tough questions (6).
6.Is Chemical Equilibrium's weightage in COMEDK going up or down?

Across all 19 papers analysed, Chemical Equilibrium has averaged about 1.8 questions per paper. In the last three years (2024–2026), that average has fallen, at about 1.4 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.