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Chemistry - Chemical Equilibrium

Practise 24 KCET previous year questions on Chemical Equilibrium, compiled from papers spanning 2008 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 Equilibrium has been asked in 15 of the 20 years of KCET papers analysed (2007–2026), with 24 questions in all. 42% of them were easy, 54% moderate and 4% tough. Most of its questions came from 2025, with 3 questions that year. In the last three years (2024–2026) it had 5 questions across 3 papers, about 1.7 per paper.

The chapter's 2 topics are not weighted equally: Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application (17 questions, 71%) and Le chatelier's principle (7 questions, 29%) 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 5 questions. Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application has produced the most tough questions (1).

  1. 1For the reversible reaction, When the partial pressure is measured in atmosphere, the value of at is . The value of when the concentration i2026Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  2. 2For the following gaseous reversible reaction: . The amount of product is affected by ____2026Le chatelier's principle
  3. 3Which of the following statements is/are true about equilibrium? (a) Equilibrium is possible only in a closed system of at a given temperatu2025Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  4. 4According to Le Chatelier's principle, in the reaction , the formation of methane is favoured by (a) Increasing the concentration of CO (b) 2025Le chatelier's principle
  5. 5The equilibrium constant at 298 K for the reaction is 100 . If the initial concentrations of all the four species were 1 M each, then equili2025Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  6. 6At , for a reversible reaction in a closed container, . In the presence of catalyst, the equilibrium is attaining 10 times faster. The equil2023Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  7. 71 mole of is heated in a closed container of capacity of . At equilibrium half a mole of is dissociated. The equilibrium constant of the rea2022Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  8. 8For the reaction, The equilibrium constant cannot be disturbed by2021Le chatelier's principle
  9. 9Match the following pKa values.2019Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  10. 10The relationship between \( {K}_{ {p}} \) and \( {K}_{ {c}} \) is \( {K}_{ {p}}= {K}_{ {c}} \) (RT) \( ^{ n_{g}} \). What would be the value2018Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  11. 11If \( 3.01 10^{20} \) molecules are removed from \( 98 {mg} \) of \( {H}_{2} {SO}_{4} \), then number of moles of \( {H}_{2} {SO}_{4} \) lef2017Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  12. 12In the following sequence of reactions The final product \( C \) is2017Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  13. 13In the reaction; \( {F} e( {OH})_{3}( {~s}) {F} e^{3+}(a q)+3 {OH}^{-}(a q) \), if the concentration of \( {OH}^{-} \)ions is decreased by \2016Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  14. 14Equilibrium constants \( K_{1} \), and \( K_{2} \) for the following equilibria (a) \( {NO}(g)+ {1}{2} {O}_{2}(g) {NO}_{2}(g) \) (b) \( 2 {N2016Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  15. 15When \( {CH}_{2}= {CH}- {O}- {CH}_{2}- {CH}_{3} \) reacts with one mole of \( {HI} \), one of the products formed is2014Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  16. 16The yield of the products in the reaction, kJ would be higher at2013Le chatelier's principle
  17. 17Consider the following gaseous equilibria with equilibrium constants and respectively, The equilibrium constants are related as2011Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  18. 18Consider the following gaseous equilibria with equilibrium constants and respectively. The equilibrium constants are related as2010Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  19. 19The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is . The equilibrium constant for the reaction of the2010Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  20. 20Cooking is fast in a pressure cooker, because2009Le chatelier's principle
  21. 21The equilibrium constant of the above reaction is at . If mole each of and are added to the system, the equilibrium constant will be2009Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  22. 22For the reaction , the equilibrium constant depends upon2008Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  23. 23The basic principle of Cottnell's precipitator is2008Le chatelier's principle
  24. 24heat. What is the effect of the increase of temperature on the equilibrium of the reaction?2008Le chatelier's principle

Frequently Asked Questions

1.How many questions are available for Chemical Equilibrium?

This chapter includes 24 questions compiled from KCET papers spanning 2008 to 2026.

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

These are KCET 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 KCET Chemistry?

Chemical Equilibrium has appeared in 15 of the 20 years of KCET papers covered here, with 24 questions across 15 papers - about 2 per paper it appears in.

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

Of the 24 questions analysed for this chapter, 42% are easy, 54% moderate and 4% tough. 2025 had the most, with 3 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 - 17 questions (71%)
  • Le chatelier's principle - 7 questions (29%)
  • Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application has produced the most tough questions (1).
6.Is Chemical Equilibrium's weightage in KCET going up or down?

Across all 15 papers analysed, Chemical Equilibrium has averaged about 1.6 questions per paper. In the last three years (2024–2026), that average has stayed about the same, at about 1.7 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.