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Ionic Equilibrum

60 questions · Chemistry · NEET
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Ionic Equilibrum

60 questions · Chemistry · NEET

  1. If the molar conductivity (Λm​) of a 0.050 mol L−1 solution of a monobasic weak acid is 90 S cm2 mol−1, its extent (degree) of dissociation will be…2025 · Q114 · MCQ
  2. Phosphoric acid ionizes in three steps with their ionization constant values Ka1​​,Ka2​​ and Ka3​​, respectively, while K is the overall ionization constant. Which of the following statements are true? A. logK=logKa1​​+logKa2​​+logKa3​​…2025 · Q131 · MCQ
  3. Which indicator is used in the titration of sodium hydroxide against oxalic acid and what is the colour change at the end point?2024 · Q107 · MCQ
  4. The ratio of solubility of AgCl in 0.1 M KCl solution to the solubility of AgCl in water is: (Given : Solubility product of AgCl = 10–10)2024 · Q142 · MCQ
  5. An acidic buffer is prepared by mixing :2023 · Q106 · MCQ
  6. 0.01 M acetic acid solution is 1% ionised, then pH of this acetic acid solution is :2022 · Q108 · MCQ
  7. The pH of the solution containing 50 mL each of 0.10 M sodium acetate and 0.01 M acetic acid is [Given pKa of CH3COOH = 4.57]2022 · Q113 · MCQ
  8. The pKb of dimethyl amine and pKa of acetic acid are 3.27 and 4.77 respectively at T (K). The correct option for the pH of dimethyl ammonium acetate solution is :2021 · Q107 · MCQ
  9. Find out the solubility of Ni(OH)2 in 0.1M NaOH. Given that the ionic product of Ni(OH)2 is 2 × 10-15.2020 · Q108 · MCQ
  10. Conjugate base for Bronsted acids H2O and HF are :2019 · Q108 · MCQ
  11. pH of a saturated solution of Ca(OH)2 is 9. The solubility product (Ksp) of Ca(OH)2 is :2019 · Q109 · MCQ
  12. Which will make basic buffer?2019 · Q110 · MCQ
  13. The solubility of BaSO4 in water is 2.42 × 10–3 g L–1 at 298 K. The value of its solubility product (Ksp) will be (Given molar mass of BaSO4 = 233 g mol–1)2018 · Q106 · MCQ
  14. Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations : A. 60 mL 10M​ HCl + 40 mL 10M​ NaOH B. 55 mL 10M​ HCl + 45 mL 10M​ NaOH C. 75 mL 5M​…2018 · Q98 · MCQ
  15. Concentration of the Ag+ ions in a saturated solution of Ag2C2O4 is 2.2 × 10−4 mol L−1. Solubility product of Ag2C2O4 is2017 · Q111 · MCQ
  16. MY and NY3, two nearly insoluble salts, have the same Ksp values of 6.2 × 10−13 at room temperature. Which statement would be true in regard to MY and NY3?2016 · Q107 · MCQ
  17. The percentage of pyridine (C5H5N) that forms pyridinium ion (C5H5N+H) ina 0.10 M aqueous pyridine solution (Kb for C5H5N = 1.7 × 10−9) is2016 · Q108 · MCQ
  18. Which of the following fluro-compounds is most likely to behave as a Lewis base ?2016 · Q109 · MCQ
  19. The solubility of AgCl(s) with solubility product 1.6 × 10−10 in 0.1 M NaCl solution would be2016 · Q99 · MCQ
  20. Which one of the following pairs of solution is not an acidic buffer ?2015 · Q100 · MCQ
  21. What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed?2015 · Q90 · MCQ
  22. The Ksp of Ag2CrO4, AgCl, AgBr and Agl are respectively, 1.1 × 10−12, 1.8 × 10−10, 5.0 × 10−13, 8.3 × 10−17. Which one of the following salts will precipitate last if AgNO3 solution is added to…2015 · Q101 · MCQ
  23. Which of the following salts will give highest pH in water?2014 · Q109 · MCQ
  24. Accumulation of lactic acid (HC3H5O3), a monobasic acid in tissues leads to pain and a feeling of fatigue. In a 0.10 M aqueous solution, lactic acid is 3.7% dissociates. The value of dissociation constant, Ka, for this acid will be2013 · Q102 · MCQ
  25. At 100oC the Kw of water is 55 times its value at 25oC. What will be the pH of neutral solution? (log 55 = 1.74)2013 · Q112 · MCQ
  26. The values of Ksp of CaCO3 and CaC2O4 are 4.7 × 10−9 and 1.3 × −9 respectively at 25oC. If the mixture of these two is washed with water, what is the concentration of Ca2+ ions in water ?2013 · Q113 · MCQ
  27. The dissociation constant of weak acid is 1 × 10−4. In order to prepare a buffer solution with a pH = 5, the [Salt]/[Acid] ratio should be2013 · Q114 · MCQ
  28. KMnO4 can be prepared from K2MnO4 as per the reaction, 3MnO42− + 2H2O ⇌ 2MnO4− + MnO2 + 4OH− The reaction can go to completion by removing OH− ions by adding2013 · Q101 · MCQ
  29. Which of these is least likely to act as a lewis base ?2013 · Q111 · MCQ
  30. Buffer solutions have constant acidity and alkalinity because2012 · Q110 · MCQ
  31. pH of a saturated solution of Ba(OH)2 is 12. The value of solubility product (Ksp) of Ba(OH)2 is2012 · Q120 · MCQ
  32. Equimolar solutions of the following substances were prepared separately. Which one of these will record the highest pH value ?2012 · Q121 · MCQ
  33. In qualitative analysis, the metals of group I can be separated from other ions by precipitating them as chloride salts. A solution initially contains Ag+ and pb2+ at a concentration of 0.10 M. Aqueous HCl is added to this solution until…2011 · Q76 · MCQ
  34. A buffer solution is prepared in which the concentration of NH3 is 0.30 M and the concentration of NH+4 is 0.20 M. If the equilibrium constant, Kb for NH3 equals 1.8 × 10−5, what is the pH of this solution? (log 2.7 = 0.43)2011 · Q107 · MCQ
  35. Which of the following is least likely to behave as Lewis base?2011 · Q118 · MCQ
  36. What is [H+] in mol/L of a solution that is 0.20 M in CH3COONa and 0.10 M in CH3COOH? Ka for CH3COOH = 1.8 × 10−52010 · Q116 · MCQ
  37. If pH of a saturated solution of Ba(OH)2 is 12, the value of its Ksp is2010 · Q126 · MCQ
  38. In a buffer solution containing equal concentration of B− and HB, the Kb for B− is 10−10. The pH of buffer solution is2010 · Q127 · MCQ
  39. What is the [OH−] in the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.10 M Ba(OH)2?2009 · Q109 · MCQ
  40. The ionization constant of ammonium hydroxide is 1.77 × 10−5 at 298 K. Hydrolysis constant of ammonium chloride is2009 · Q119 · MCQ
  41. Which of the following molecules acts as a Lewis acid?2009 · Q120 · MCQ
  42. Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the H+ ion concentration in the mixture?2008 · Q118 · MCQ
  43. A weak acid, HA, has a Ka of 1.00 × 10−5. If 0.100 mol of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closest to2007 · Q101 · MCQ
  44. Calculate the pOH of a solution at 25oC that contains 1 × 10−10 M of hydronium ions, i.e. H3O+.2007 · Q102 · MCQ
  45. Which of the following pairs constitutes a buffer?2006 · Q108 · MCQ
  46. The hydrogen ion concentration of a 10−8 M, HCl aqueous solution at 298 K (Kw = 10−14) is2006 · Q119 · MCQ
  47. H2S gas when passed through a solution of cations containing HCl precipitates the cations of second group of qualitative analysis but not those belonging to the fourth group. It is because2005 · Q114 · MCQ
  48. At 25oC, the dissociation constant of a base, BOH, is 1.0 × 10−12. The concentration of hydroxyl ions in 0.01 M aqueous solution of the base would be2005 · Q115 · MCQ
  49. The solubility product of a sparingly soluble salt AX2 is 3.2 × 10−11. Its solubility (in moles/L) is2004 · Q109 · MCQ
  50. The rapid change of pH near the stoichiometric point of an acid-base titration is the basis of indicator detection. pH of the solution is related to ratio of the concentrations of the conjugate acid (HIn) and base (In−) forms of the…2004 · Q110 · MCQ
  51. The solubility product of AgI at 25oC is 1.0 × 10−16 mol2 L−2. The solubility of AgI in 10−4 N solution of KI at 25oC is approximately (in mol L−12003 · Q121 · MCQ
  52. Solubility of MX2 type electrolytes is 0.5 × 10−4 mole/lit., then find out Ksp of electrolytes.2002 · Q118 · MCQ
  53. Which has highest pH?2002 · Q119 · MCQ
  54. Solution of 0.1 N NH4OH and 0.1 N NH4Cl has pH 9.25. Then find out pKb of NH4OH2002 · Q120 · MCQ
  55. In HS−, I−, R − NH2, NH3 order of proton accepting tendency will be2001 · Q118 · MCQ
  56. Ionisation constant of CH3COOH is 1.7 × 10−5 and concentration of H+ ions is 3.4 × 10−4. Then find out initial concentration of CH3COOH molecules.2001 · Q119 · MCQ
  57. Solubility of M2S salt is 3.5 × 10−6 then find out solubility product.2001 · Q120 · MCQ
  58. Correct relation between dissociation constants of a dibasic acid is2001 · Q121 · MCQ
  59. Conjugate acid of NH2− is2000 · Q115 · MCQ
  60. Which statement is wrong about pH and H+?2000 · Q116 · MCQ