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Chemistry - Chemical Equilibrium

Practise 81 AP EAMCET previous year questions on Chemical Equilibrium, compiled from papers spanning 2001 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty AP EAMCET tests.

Chemical Equilibrium has been asked in 22 of the 24 years of AP EAMCET papers analysed (2001–2024), with 81 questions in all. 41% of them were easy, 48% moderate and 11% tough. Most of its questions came from 2023, with 9 questions that year. In the last three years (2022–2024) it had 25 questions across 28 papers, about 0.9 per paper.

The chapter's 2 topics are not weighted equally: Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application (70 questions, 86%) and Le chatelier's principle (11 questions, 14%) 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 37 questions. Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application has produced the most tough questions (8).

  1. 1Consider the following equilibrium reaction in gaseous state at . The initial concentration of is 1.5 times that of . At equilibrium, the co27 May, 2025 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  2. 2At value of is 16. In a closed 1 L flask, one mole each of and BO are taken and heated to . Identify the correct statements about this equil26 May, 2025 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  3. 3For the following given equilibrium reaction is equal to 1076 at . What is the value of T (in K) ? ( -atm )26 May, 2025 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  4. 4At , consider the following gaseous reaction, which is in equilibrium. What is the fraction of decomposed at constant volume and temperature24 May, 2025 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  5. 5Consider the following gaseous equilibrium reactions (I), (II) and (III) with equilibrium constants and respectively I) II) III) The correct23 May, 2025 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  6. 6At 298 K, the value of for is 0.113 atm. The partial pressure of at equilibrium is 0.2 atm. What is the partial pressure (in atm) of at equi23 May, 2025 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  7. 7At value for is 16. In a closed 1 L flask, one mole each of and BO are taken and heated to . What is the concentration (in ) of at equilibri22 May, 2025 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  8. 8At , the following gaseous equilibrium is established. The initial concentration of W is two times to the initial concentration of X. The sy22 May, 2025 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  9. 9The following equilibrium is established at STP. Atoms of B occupy of total volume at STP. The total pressure of the system is 1 bar. What i21 May, 2025 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  10. 10At 298 K, the value of for the following reaction is . What is the approximate value for this reaction?21 May, 2025 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  11. 11At for the reaction. is . What is its (in atm) at the same temperature?23 May, 2024 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  12. 12At equilibrium for the reaction the concentrations of and AB respectively are and in a sealed vessel at 800 K . What will be for the decompo22 May, 2024 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  13. 13for the reaction is 39.0. In a closed one litre flask, one mole of was heated to . What are the concentrations of and (in ) respectively at 21 May, 2024 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  14. 1415 moles of and 5.2 moles of are mixed and allowed to attain equilibrium at 773 K . At equilibrium, the number of moles of HI is found to be21 May, 2024 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  15. 15for the reaction, is 99.0 . In a 1 L closed flask two moles of is heated to . What is the concentration of (in ) at equilibrium?20 May, 2024 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  16. 16At , the equilibrium constant for the reaction is . If 10 bar ' of HBr is introduced into a sealed vessel at , the equilibrium pressure of H20 May, 2024 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  17. 17for the following reaction is 99.0 In a one litre flask, 2 moles of was heated to and the above equilibrium is reached. The concentrations a19 May, 2024 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  18. 18At for the reaction. is 99.0 . Two moles of was heated to in a closed flask to reach the above equilibrium. What are the concentrations (in 18 May, 2024 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  19. 19At , the for the reaction is . The equilibrium pressure (in atm) of ) when it is placed in a flask at pressure and allowed to come to above 19 May, 2023 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  20. 20At , the value of for the below reaction is 10 . Value of (in atm) is (given )18 May, 2023 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  21. 21Observe the following solutions (i) of (ii) of (iii) of (iv) of (v) of Which of the above two solutions when mixed will give a white precipi18 May, 2023 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  22. 22Observe the following equilibrium yellow colourless deep red Addition of aqueous oxalic acid solution to the above equilibrium18 May, 2023 (E)Le chatelier's principle
  23. 23One mole of is heated to till the following equilibrium is obtained The equilibrium constant of this reaction is . After reaching the equili17 May, 2023 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  24. 24One mole of was heated in a closed flask at . At equilibrium, 0.1 mole of was formed. What is its (in atm)? (Given )16 May, 2023 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  25. 25Observe the following equilibrium at Which one of the following does not disturb the above equilibrium?16 May, 2023 (E)Le chatelier's principle
  26. 26One mole and one mole are taken in flask and heated to . At equilibrium, (by mass) of water reacted with as follows Its value is15 May, 2023 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  27. 27At , the equilibrium constant for the reaction is . If the reaction takes place in the following form its equilibrium constant is . The corr15 May, 2023 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  28. 28for the reaction at is08 Jul, 2022 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  29. 29Assertion (A) : For an endothermic dissolution process, increase in temperature increases the solubility in a nearly saturated solution. Rea08 Jul, 2022 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  30. 30A of aqueous solution contains and NaI. To this solution, aqueous solution is added drop wise. The order of precipitation of is08 Jul, 2022 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  31. 31For the formation of from its constituent elements, which of the relation between the reaction quotient and equilibrium constant is correct 07 Jul, 2022 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  32. 32For ammonia formation from constituent elements, the expression for is06 Jul, 2022 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  33. 33At , for the reaction , the is . What is its in ? atom .05 Jul, 2022 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  34. 34For a reaction heat favorable conditions for the reaction to occur in the forward direction are05 Jul, 2022 (E)Le chatelier's principle
  35. 35The formation of ammonia from its constituent elements is an exothermic reaction. The effect of increase temperature on the reaction equilib04 Jul, 2022 (M)Le chatelier's principle
  36. 36Given for the reaction at a fixed temperature is . Find the for the reaction at the same temperature.25 Aug, 2021 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  37. 37Which of the following statement is true when equilibrium is established in the reaction?24 Aug, 2021 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  38. 38The reaction, is exothermic and reversible. A mixture of and is at equilibrium in a closed container. When a certain quantity of extra is in24 Aug, 2021 (E)Le chatelier's principle
  39. 39Identify the correct expression for the equilibrium constant of the following reaction.23 Aug, 2021 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  40. 40When the reaction was studied, it was observed that the initial concentration of was 1.5 times that of , and the equilibrium concentrations 23 Aug, 2021 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  41. 41Le-Chateliar s principle is not applicable to20 Aug, 2021 (M)Le chatelier's principle
  42. 42For the reaction SO 2 ( g ) + 1 2 O 2 ( g ) SO 3 ( g ) , the percentage yield of product at different pressures is shown in the figure. Then19 Aug, 2021 (M)Le chatelier's principle
  43. 43Which among the following denotes the correct relationship between K p and K c for the reaction 2 A ( g ) B ( g ) + C ( g )19 Aug, 2021 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  44. 44Using the data provided, find the value of equilibrium constant for the following reaction at 298 K and 1 atm pressure. NO ( g ) + 1 2 O 2 (19 Aug, 2021 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  45. 45The supply of oxygen to tissues by blood, can be explained by21 Sep, 2020 (E)Le chatelier's principle
  46. 46For a reversible reaction, if the concentration of reactants is increased, the equilibrium constant of the reaction21 Sep, 2020 (E)Le chatelier's principle
  47. 47For a reversible reaction, if the concentration of the reactants is reduced to half, the equilibrium constant will be.........18 Sep, 2020 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  48. 48For the reaction, \( {NO}_2+ {CO} {NO}+ {CO}_2\) one mole of \( {NO}_2\) and 2 moles of \( {CO}\) were kept in a vessel. Calculate the equil18 Sep, 2020 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  49. 49\(18.4 {~g} {~N}_2 {O}_4\) was placed in \(1 {~L}\) vessel at \(400 {~K}\) and allowed to attain the following equilibrium \( {N}_2 {O}_4(g)23 Apr, 2019 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  50. 50The stepwise stability constants of a complex are given below. What is its overall reaction stability constant \( ( _4 )\) ? \( {aligned} & 23 Apr, 2019 (M)Law 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 81 questions compiled from AP EAMCET papers spanning 2001 to 2025.

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

These are AP EAMCET 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 AP EAMCET Chemistry?

Chemical Equilibrium has appeared in 23 of the 25 years of AP EAMCET papers covered here, with 81 questions across 73 papers - about one per paper it appears in.

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

Of the 81 questions analysed for this chapter, 41% are easy, 48% moderate and 11% tough. 2023 had the most, with 9 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 - 70 questions (86%)
  • Le chatelier's principle - 11 questions (14%)
  • Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application has produced the most tough questions (8).
6.Is Chemical Equilibrium's weightage in AP EAMCET going up or down?

Across all 73 papers analysed, Chemical Equilibrium has averaged about 1.1 questions per paper. In the last three years (2022–2024), that average has fallen, at about 0.9 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.