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Chemistry - Ionic Equilibrium

Practise 70 NEET previous year questions on Ionic Equilibrium, compiled from papers spanning 2002 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 NEET tests.

Ionic Equilibrium has been asked in 25 of the 39 years of NEET papers analysed (1988–2026), with 70 questions in all. 23% of them were easy, 39% moderate and 39% tough. Most of its questions came from 2019, with 6 questions that year. In the last three years (2024–2026) it had 7 questions across 13 papers, about 0.5 per paper.

The chapter's 7 topics are not weighted equally: Solubility (19 questions, 27%), PH of solutions (16 questions, 23%), and Theories of Acids and Bases (16 questions, 23%) have been asked the most. Over the last five years the most frequent topics have been Buffer solutions (3), PH of solutions (3), and Solubility (3). Solubility has produced the most tough questions (10).

  1. 1In a qualitative analysis is detected by appearance of precipitate of . Calculate pH when the following equilibrium exists at K : , (Given :2026 (Cancelled)Solubility
  2. 2At K, a certain buffer solution contains equal concentrations of and , for is . What is the pH of this buffer solution ?2026 (Cancelled)Buffer solutions
  3. 3Phenolphthalein is used as an indicator for the titration of sodium hydroxide solution against a standard solution of oxalic acid. The colou2026 (Cancelled)Indicators
  4. 4The correct order of solubility of the given salts in water at K is Salt at 298 K AgBr Zn(OH) Hg Cl2026 (Re-NEET)Solubility
  5. 5Phosphoric acid ionizes in three steps with their ionization constant values and , respectively, While K is the overall ionization constant.2025PH of solutions
  6. 6Which indicator is used in the titration of sodium hydroxide against oxalic acid and what is the colour change at the end point?2024 (Re-NEET)PH of solutions
  7. 7The ratio of solubility of AgCl in 0.1 M KCl solution to the solubility of AgCl in water is: (Given : Solubility product of )2024 (Re-NEET)Solubility
  8. 8Amongst the given options which of the following molecules/ion acts as a Lewis acid?2023 (All India)Theories of Acids and Bases
  9. 9An acidic buffer is prepared by mixing:2023 (Manipur)Buffer solutions
  10. 10For a weak acid , the percentage of dissociation is nearly at equilibrium. If the concentration of acid is , then the correct option for its2023 (Manipur)Theories of Acids and Bases
  11. 11The pH of the solution containing 50 mL each of 0 . 10 M sodium acetate and 0 . 01 M acetic acid is [Given pK a of CH 3 COOH = 4 . 57 ]2022 (Phase 1)Buffer solutions
  12. 12acetic acid solution is ionised, then of this acetic acid solution is :2022 (Phase 2)PH of solutions
  13. 13The pK b of dimethylamine and pK a of acetic acid are 3 . 27 and 4 . 77 respectively at T ( K ) . The correct option for the pH of dimethyla2021Salt Hydrolysis
  14. 14HCl was passed through a solution of CaCl 2 , MgCl 2 and NaCl . Which of the following compound(s) crystallise(s)?2020 (Phase 1)Theories of Acids and Bases
  15. 15Find out the solubility of Ni OH 2 in 0.1 M NaOH . Given that the ionic product of Ni OH 2 is 2 10 15 .2020 (Phase 1)Solubility
  16. 16Which among the following salt solutions is basic in nature?2020 (Phase 2)Salt Hydrolysis
  17. 17The solubility product for a salt of the type AB is 4 10 - 8 . What is the molarity of its saturated solution?2020 (Phase 2)Solubility
  18. 18pH of a saturated solution of C a O H 2 is 9 . The solubility product K s p of C a O H 2 is:2019 (All India)Solubility
  19. 19Conjugate base for Bronsted acids H 2 O and HF are:2019 (All India)Theories of Acids and Bases
  20. 20Which will make basic buffer?2019 (All India)Buffer solutions
  21. 21The of solution will be2019 (Odisha)PH of solutions
  22. 22Which of the following cannot act both as Bronsted acid and as Bronsted base?2019 (Odisha)Theories of Acids and Bases
  23. 23The molar solubility of in solution of will be2019 (Odisha)Solubility
  24. 24Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations. (i) 60 mL M 10 HCl + 40 mL M 10 N2018PH of solutions
  25. 25The solubility of BaSO 4 in water is 2 .42 10 - 3 gL - 1 at 298 K . The value of its solubility product K sp will be (Given- the molar mass 2018Solubility
  26. 26Concentration of the Ag + ions in a saturated solution of Ag 2 C 2 O 4 is 2 .2 10 - 4 mol L - 1 . Solubility product of Ag 2 C 2 O 4 is2017Solubility
  27. 27MY and N Y 3 , two nearly insoluble salts, have the same K s p values of 6.2 10 - 13 at room temperature. Which statement would be true in r2016 (Phase 1)Solubility
  28. 28The percentage of pyridine C 5 H 5 N that forms pyridinium ion C 5 H 5 N + H in a 0 . 10 M aqueous pyridine solution K b for C 5 H 5 N = 1 .2016 (Phase 2)Theories of Acids and Bases
  29. 29The solubility of A g C l s with solubility product 1.6 × 10 - 10 in 0.1 M N a C l solution would be2016 (Phase 2)Theories of Acids and Bases
  30. 30The K sp of Ag 2 CrO 4 , AgCl , AgBr and A g I are respectively, 1.1 10 - 12 , 1.8 10 - 10 , 5.0 10 - 13 , 8.3 10 - 17 . Which one of the fo2015 (Phase 1)Solubility
  31. 31Which one of the following pairs of solution is not an acidic buffer?2015 (Phase 2)Buffer solutions
  32. 32What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed?2015 (Phase 2)PH of solutions
  33. 33Which of the following salts will give highest p H in water?2014PH of solutions
  34. 34Which of these is least likely to act as a Lewis base?2013 (All India)Theories of Acids and Bases
  35. 35Accumulation of lactic acid , a monobasic acid in tissues leads to pain and a feeling of fatigue. In a 0.10 aqueous solution, lactic acid is2013 (Karnataka)Theories of Acids and Bases
  36. 36At the of water is 55 times its value at . What will be the of neutral solution?2013 (Karnataka)PH of solutions
  37. 37The dissociation constant of a weak acid is . In order to prepare a buffer solution with a pH , the [Salt]/ [Acid] ratio should be:2013 (Karnataka)Buffer solutions
  38. 38The value of of and are and respectively at . If the mixture of these two is washed with water, what is the concentration of ions in water?2013 (Karnataka)Solubility
  39. 39of a saturated solution of is 12. The value of solubility product of is2012 (Screening)Solubility
  40. 40Equimolar solutions of the following substances were prepared separately. Which one of these will record the highest value?2012 (Screening)PH of solutions
  41. 41Buffer solutions have constant acidity and alkalinity because2012 (Screening)Buffer solutions
  42. 42In qualitative analysis, the metals of group I can be separated from other ions by precipitating them as chloride salts. A solution initiall2011 (Mains)Solubility
  43. 43A buffer solution is prepared in which the concentration of is and the concentration of is . If the equilibrium constant, for equals , what 2011 (Screening)Buffer solutions
  44. 44Which of the following is least likely to behave as Lewis base?2011 (Screening)Theories of Acids and Bases
  45. 45Which of the following species is not electrophilic in nature?2010 (Mains)Theories of Acids and Bases
  46. 46Which one of the following molecular hydrides acts as a Lewis acid ?2010 (Screening)Theories of Acids and Bases
  47. 47What is in of a solution that is in and in ? for )2010 (Screening)Buffer solutions
  48. 48In a buffer solution containing equal concentration of and , the for is . The of buffer solution is2010 (Screening)Buffer solutions
  49. 49If of a saturated solution of is 12 , the value of its is2010 (Screening)Solubility
  50. 50Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states ?2009 (Mains)Theories of Acids and Bases

Frequently Asked Questions

1.How many questions are available for Ionic Equilibrium?

This chapter includes 70 questions compiled from NEET papers spanning 2002 to 2026.

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

These are NEET questions specifically for the Ionic Equilibrium chapter. Questions from other exams like AIIMS or JIPMER are organised separately under their respective exam sections.

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

Ionic Equilibrium has appeared in 25 of the 25 years of NEET papers covered here, with 70 questions across 37 papers - about 2 per paper it appears in.

4.What is the difficulty level of Ionic Equilibrium questions in NEET?

Of the 70 questions analysed for this chapter, 23% are easy, 39% moderate and 39% tough. 2019 had the most, with 6 questions.

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

These topics have carried the most weightage in Ionic Equilibrium:

  • Solubility - 19 questions (27%)
  • PH of solutions - 16 questions (23%)
  • Theories of Acids and Bases - 16 questions (23%)
  • Solubility has produced the most tough questions (10).
6.Is Ionic Equilibrium's weightage in NEET going up or down?

Across all 37 papers analysed, Ionic Equilibrium has averaged about 1.9 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.5 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.