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Chemistry - Ionic Equilibrium

Practise 35 COMEDK previous year questions on Ionic 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.

Ionic Equilibrium has been asked in 12 of the 15 years of COMEDK papers analysed (2012–2026), with 35 questions in all. 23% of them were easy, 60% moderate and 17% tough. Most of its questions came from 2024, with 5 questions that year. In the last three years (2024–2026) it had 10 questions across 8 papers, about 1.3 per paper.

The chapter's 6 topics are not weighted equally: PH of solutions (13 questions, 37%), Solubility (7 questions, 20%), and Theories of Acids and Bases (7 questions, 20%) have been asked the most. Over the last five years the most frequent topics have been Buffer solutions (5), PH of solutions (5), and Solubility (4). PH of solutions has produced the most tough questions (2).

  1. 1At 30°C the solubility of PbI salt in 0.2 M KI solution will be X, if the solubility product of PbI at 30°C is . Identify the value of X.09 May, 2026 (S2)Solubility
  2. 2A buffer solution was prepared by mixing 5 g of acetic acid with 7.5 g of sodium acetate. The solution was made upto 500 mL . The pH of the 25 May, 2025 (Shift)Buffer solutions
  3. 3What volume of needs to be added to of solution to prepare a buffer of pH equal to 4.91 ? ( of is 4.76)10 May, 2025 (S1)Buffer solutions
  4. 4Solubility product of the sparingly soluble salt in aqueous medium is Calculate the mass in gram of present in 100 ml of its saturated solut10 May, 2025 (S1)Solubility
  5. 5The ionisation constant of the weak acid HF whose concentration is is . The Equilibrium constant value for the reaction is _____ and the pH 10 May, 2025 (S2)Salt Hydrolysis
  6. 6Preview not available - open to view this question.2024 (Afternoon Shift)PH of solutions
  7. 7What volume of Acetic acid is to be added to of Sodium acetate so that a Buffer solution of equal to 4.94 is obtained? of2024 (Evening Shift)Buffer solutions
  8. 8The pH at which an acid indicator with changes colour when the indicator concentration is is2024 (Memory Based)PH of solutions
  9. 9of an aqueous solution of with value of 10 is mixed with of an aqueous solution of with a value of 4. What will be the of the resultant solu2024 (Morning Shift)PH of solutions
  10. 10is a sparingly soluble salt with a solubility of . If the Molar mass of is , what is the expression for its ?2024 (Morning Shift)Solubility
  11. 11What would be the volume of water required to dissolve of of molar mass to prepare a saturated solution of the salt? of2023 (Evening Shift)Solubility
  12. 12In a aqueous solution, lactic acid is dissociated. The value of dissociation constant is2023 (Memory Based)Theories of Acids and Bases
  13. 13A buffer solution has equal volumes of and . The of the base is 5 . The is2023 (Memory Based)Buffer solutions
  14. 14A buffer solution has equal volumes of and . The of the base is 5. The is2023 (Morning Shift)Buffer solutions
  15. 15In a aqueous solution, lactic acid is dissociated. The value of dissociation constant is2023 (Morning Shift)PH of solutions
  16. 16of solution of is.2022PH of solutions
  17. 17Hydroxyl ion concentration of is2020Theories of Acids and Bases
  18. 18Which of the following salts on being dissolved in water gives at ?2020PH of solutions
  19. 19The volume of and HCl required to make 1 litre of are2020Theories of Acids and Bases
  20. 20of solution of contains2019PH of solutions
  21. 21Pure water is neutral because2019PH of solutions
  22. 22Conjugate acid of is2019Theories of Acids and Bases
  23. 23Which of the following represents the Lewis structure of molecule?2018Theories of Acids and Bases
  24. 24Solubility product of a salt is in a solution in which the concentration of ions is . The salt will precipitate when the concentration of io2018Solubility
  25. 25The of solution is2018PH of solutions
  26. 26Which of the following is not an amphoteric substance?2016Theories of Acids and Bases
  27. 27In a mixture of acetic acid and sodium acetate the ratio of concentrations of the salt to the acid is increased ten times. Then the pH of th2016Buffer solutions
  28. 28Select the value of the strongest acid from the following.2016PH of solutions
  29. 29Which of the following equations give ionic product of water? I. II. III. IV.2015Ionic Product of Water
  30. 30The number of ions present in of a solution whose is 132015PH of solutions
  31. 31Solubility product of a salt is in a solution in which concentration of is . The salt will precipitate when the concentration of becomes mor2013Solubility
  32. 32The of boiling water is . This implies that boiling water is2012PH of solutions
  33. 33On passing into a solution containing both and in acidic medium, only CuS gets precipitate(d) This is because2012Solubility
  34. 34The of a mixture of of . of and of is2012PH of solutions
  35. 35The conjugate acid of is2012Theories of Acids and Bases

Frequently Asked Questions

1.How many questions are available for Ionic 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 Ionic Equilibrium chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

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

Ionic 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 Ionic Equilibrium questions in COMEDK?

Of the 35 questions analysed for this chapter, 23% are easy, 60% moderate and 17% tough. 2024 had the most, with 5 questions.

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

These topics have carried the most weightage in Ionic Equilibrium:

  • PH of solutions - 13 questions (37%)
  • Solubility - 7 questions (20%)
  • Theories of Acids and Bases - 7 questions (20%)
  • PH of solutions has produced the most tough questions (2).
6.Is Ionic Equilibrium's weightage in COMEDK going up or down?

Across all 19 papers analysed, Ionic Equilibrium has averaged about 1.8 questions per paper. In the last three years (2024–2026), that average has fallen, at about 1.3 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.