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Chemistry - Chemical Equilibrium

Practise 24 AIIMS previous year questions on Chemical Equilibrium, 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 Equilibrium has been asked in 14 of the 19 years of AIIMS papers analysed (2001–2019), with 24 questions in all. 58% of them were easy, 33% moderate and 8% tough. Most of its questions came from 2018, with 5 questions that year. In the last three years (2017–2019) it had 7 questions across 5 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 (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 produced the most tough questions (2).

  1. 1In which of the following reactions ?26 May, 2019Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  2. 2In the given reaction : 2 moles each of and present in of solution combine to form 1 mole of . Calculate for the reaction.27 May, 2018Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  3. 3Assertion : Solubility of gases increases with increase in pressure. Reason : Dissolution of gas in liquid is exothermic.27 May, 2018Le chatelier's principle
  4. 4If for the reaction, and initial concentration of is then equilibrium concentration of is26 May, 2018Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  5. 5When pressure is increased at constant temperature26 May, 2018Le chatelier's principle
  6. 6A vessel of one litre capacity containing 1 mole of is heated till a state of equilibrium is attained. At equilibrium, 0.6 moles of had form26 May, 2018Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  7. 7For the reaction, . If the initial number of moles of each reactant and product is 1 mole then at equilibrium2017Le chatelier's principle
  8. 8One mole of was placed in a vessel of capacity at a certain temperature and the following equilibrium was established. If 0.6 moles of were 2015Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  9. 9The equilibrium constant for the reaction, is . Equilibrium constant for the reaction, will be2014Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  10. 10for following reaction will be2012Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  11. 11At and is dissociated into then is2012Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  12. 12Which of the following is not a characteristic of equilibrium?2011Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  13. 13Assertion : The equilibrium constant is fixed and a characteristic for any given chemical reaction at a specified temperature. Reason: The c2010Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  14. 14A vessel of one litre capacity containing 1 mole of is heated till a state of equilibrium is attained. . At equilibrium, 0.6 moles of had fo2009Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  15. 15The equilibrium constant for mutarotation -D Glucose -D Glucose is 1.8 . What percentage of form remains at equilibrium?2009Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  16. 16Assertion : Ice water, if pressure is applied water will evaporate. Reason : Increases of pressure pushes the equilibrium towards the side i2009Le chatelier's principle
  17. 17The dissociation equilibrium of a gas \(A B_2\) can be represented as \[ 2 A B_{2(g)} 2 A B_{(g)}+B_{2(g)} \] The degree of dissociation is 2008Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  18. 18Assertion : According to Le-Chatelier's principle addition of heat to an equilibrium solid \( \) liquid results in decrease in the amount of2008Le chatelier's principle
  19. 19Assertion : The equilibrium constant is fixed and a characteristic for any given chemical reaction at a specified temperature. Reason : The 2007Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  20. 20For reaction, , at is . The value of is nearly2005Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  21. 21For the chemical equilibrium, can be determined from which one of the following plots?2005Le chatelier's principle
  22. 22Of the following which change will shift the reaction towards the product?2004Le chatelier's principle
  23. 23In which of the following reaction ?2001Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  24. 24Which of the following is a characteristic of a reversible reaction?2001Law 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 24 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 Equilibrium chapter. Questions from other exams like NEET or JIPMER are organised separately under their respective exam sections.

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

Chemical Equilibrium has appeared in 14 of the 19 years of AIIMS 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 AIIMS?

Of the 24 questions analysed for this chapter, 58% are easy, 33% moderate and 8% tough. 2018 had the most, with 5 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 (2).
6.Is Chemical Equilibrium's weightage in AIIMS going up or down?

Across all 15 papers analysed, Chemical Equilibrium has averaged about 1.6 questions per paper. In the last three years (2017–2019), that average has stayed about the same, 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.