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Chemistry - Solutions

Practise 79 COMEDK previous year questions on Solutions, 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.

Solutions has been asked in 12 of the 15 years of COMEDK papers analysed (2012–2026), with 79 questions in all. 22% of them were easy, 71% moderate and 8% tough. Most of its questions came from 2025, with 20 questions that year. In the last three years (2024–2026) it had 45 questions across 10 papers, about 4.5 per paper.

The chapter's 4 topics are not weighted equally: Colligative Properties and Abnormal Molecular Masses (42 questions, 53%), Vapour pressure and raoult's law (19 questions, 24%), and Henry's law (9 questions, 11%) have been asked the most. Colligative Properties and Abnormal Molecular Masses has also led over the last five years, with 30 questions. Vapour pressure and raoult's law has produced the most tough questions (4).

  1. 10.02M solution of sucrose is isotonic with 0.008M solution of sodium sulphate. What is the percentage dissociation of the electrolyte?09 May, 2026 (S1)Colligative Properties and Abnormal Molecular Masses
  2. 2What is the percentage dissociation of 0.8ml of Acetic acid (density is 1.04g/ml) which is dissolved in 1.2L of water if the observed Depres09 May, 2026 (S1)Colligative Properties and Abnormal Molecular Masses
  3. 3Identify the correct statement09 May, 2026 (S1)Colligative Properties and Abnormal Molecular Masses
  4. 4An aqueous solution of an unknown solute "X" is prepared by adding 4.0g of it into 2.0moles of water. What is the mass percent of "X" in the09 May, 2026 (S1)Solubility and Concentration of Solutions
  5. 5Identify the law which is stated as "For any solutions, the partial vapour pressure of each volatile component in the solution is directly p09 May, 2026 (S2)Vapour pressure and raoult's law
  6. 6The system that forms maximum boiling azeotrope is:09 May, 2026 (S2)Vapour pressure and raoult's law
  7. 7When 1 mole of benzene is mixed with 1 mole of toluene, the vapours will contain09 May, 2026 (S2)Vapour pressure and raoult's law
  8. 8A 5% solution (by mass) of cane sugar in water has a freezing point of 271 K. The freezing point of a 5% solution (by mass) of glucose in wa09 May, 2026 (S2)Colligative Properties and Abnormal Molecular Masses
  9. 9At exerts a partial pressure of 0.835 bar. The amount of in millimoles dissolved in 0.9 L of water is: for at 298 K is25 May, 2025 (Shift)Henry's law
  10. 10Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R). Choose the correct answer from the optio25 May, 2025 (Shift)Solubility and Concentration of Solutions
  11. 11Two liquids A and B form an ideal solution. At 300 K , the vapour pressure of pure A and pure B are and respectively. If the solution has 4025 May, 2025 (Shift)Vapour pressure and raoult's law
  12. 120.60 g of urea is dissolved in 360 g of water at room temperature. The vapour pressure of pure water is 35 mm of Hg , the lowering of vapour25 May, 2025 (Shift)Vapour pressure and raoult's law
  13. 13800 mL of a at 300 K is heated to a temperature of 350 K , its volume is reduced to one half and 10.5 g of is evaporated. Assuming complete 25 May, 2025 (Shift)Solubility and Concentration of Solutions
  14. 14For a 1.0 molal solution containing the non-volatile solute Urea, the elevation in boiling point is 2.0 K while the depression in freezing p10 May, 2025 (S1)Colligative Properties and Abnormal Molecular Masses
  15. 15A non-volatile solute A weighing 60 g when dissolved in 212 g of the solvent Xylene reduces its vapour pressure to . What is the Molar mass 10 May, 2025 (S1)Vapour pressure and raoult's law
  16. 16Two volatile liquids X and Y form an ideal solution at 298 K and have vapour pressures equal to 100 mm and 200 mm of Hg respectively in thei10 May, 2025 (S1)Vapour pressure and raoult's law
  17. 17When of formic acid is added to 600 ml of water the freezing point of water is depressed. If of Formic acid undergoes dissociation what woul10 May, 2025 (S1)Colligative Properties and Abnormal Molecular Masses
  18. 18Choose the correct statement.10 May, 2025 (S1)Solubility and Concentration of Solutions
  19. 19An aqueous solution which contains by weight ( ) of a volatile liquid " A " of molar mass of , has a vapour pressure of 2141.4 mm of Hg at .10 May, 2025 (S2)Vapour pressure and raoult's law
  20. 20A dilute solution of an ionic compound has an Osmotic pressure which is 6 times that of . What is the molar concentration of assuming that i10 May, 2025 (S2)Colligative Properties and Abnormal Molecular Masses
  21. 21A dilute solution of reagent is ionised. What would be the approximate value of its van't Hoff factor?10 May, 2025 (S2)Colligative Properties and Abnormal Molecular Masses
  22. 22When is added to 40 g of Benzene to form a solution, the freezing point is depressed by . If Acetic acid undergoes dimerisation in Benzene (10 May, 2025 (S2)Colligative Properties and Abnormal Molecular Masses
  23. 23Lead storage battery contains which has a density of . Calculate the molality of aqueous solution of .10 May, 2025 (S2)Solubility and Concentration of Solutions
  24. 24An aqueous solution of an electrolyte is prepared by dissolving 0.5625 moles in 750 ml of water and is found to be 80% ionised. If for water10 May, 2025 (S3)Solubility and Concentration of Solutions
  25. 25An aqueous solution of volume V ml contains a non-volatile solute of unknown mass and molar mass . If the Osmotic pressure of the solution i10 May, 2025 (S3)Colligative Properties and Abnormal Molecular Masses
  26. 26The ratio of and gases in the atmosphere is . The ratio of the mole fractions of the dissolved gases in rain water will be approximately ---10 May, 2025 (S3)Henry's law
  27. 27At 300 K the vapour pressure of an ideal solution containing 1.0 mole each of volatile liquids X and Y is 1000 mm . Keeping the temperature 10 May, 2025 (S3)Vapour pressure and raoult's law
  28. 28The mole fraction of an unknown solute in 1560 g of Benzene is 0.5 . What is the molality of the solution? (M. M of Benzene:78 amu)10 May, 2025 (S3)Solubility and Concentration of Solutions
  29. 29The system that forms minimum boiling azeotrope is :2024 (Afternoon Shift)Vapour pressure and raoult's law
  30. 30A solution of containing per of is isotonic with a solution of urea ) containing per of urea. The degree of dissociation of is: [Assume both2024 (Afternoon Shift)Colligative Properties and Abnormal Molecular Masses
  31. 31Which among the following compounds has the highest freezing point of its 1 molal aqueous solution?2024 (Afternoon Shift)Colligative Properties and Abnormal Molecular Masses
  32. 32An aqueous solution of glucose boils at . The number of glucose molecules in a solution containing of water is _________ [ for water is ]2024 (Afternoon Shift)Colligative Properties and Abnormal Molecular Masses
  33. 33In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the 2024 (Afternoon Shift)Colligative Properties and Abnormal Molecular Masses
  34. 34Sulphuric acid used in Lead Storage battery has a concentration of and a density of . The molality of the acid is __________.2024 (Evening Shift)Solubility and Concentration of Solutions
  35. 35Study the graph between partial pressure and mole fraction of some gases and arrange the gases P, Q, R and S dissolved in H O, in the decrea2024 (Evening Shift)Henry's law
  36. 36of an aqueous solution contains of Glucose and of Urea maintained at a temperature equal to . What is the Osmotic pressure of the solution i2024 (Evening Shift)Colligative Properties and Abnormal Molecular Masses
  37. 37Given that the freezing point of benzene is and its value is . What would be the freezing point of a solution of of propane in of benzene?2024 (Evening Shift)Colligative Properties and Abnormal Molecular Masses
  38. 38A solute is found to exist as a dimer in water. A 4 molal solution of shows a boiling point of . What is the percentage association of ? ( f2024 (Evening Shift)Colligative Properties and Abnormal Molecular Masses
  39. 39Which of the following pair of solutions can we expect to be isotonic at the same temperature?2024 (Memory Based)Colligative Properties and Abnormal Molecular Masses
  40. 40From the given aqueous solutions below, arrange them in the order of their increasing boiling points. (i) (ii) urea (iii) (iv)2024 (Memory Based)Colligative Properties and Abnormal Molecular Masses
  41. 41The boiling point of a aqueous solution of a non-volatile solute is equal to the boiling point of solution of another non-volatile solute . 2024 (Morning Shift)Colligative Properties and Abnormal Molecular Masses
  42. 42What is the amount of ice that separates out on cooling a solution containing of Ethylene glycol in of water to ? of MM of ethylene glycol=2024 (Morning Shift)Colligative Properties and Abnormal Molecular Masses
  43. 43Preview not available - open to view this question.2024 (Morning Shift)Colligative Properties and Abnormal Molecular Masses
  44. 44for at is . What should be the partial pressure of gas so that it has a solubility of in water at ? (Density of solution )2024 (Morning Shift)Henry's law
  45. 45Above figure represents Vapour pressure versus Temperature graphs of 2 pure volatile liquids and a solution formed by the 2 liquids. (i) Whi2024 (Morning Shift)Vapour pressure and raoult's law
  46. 46If the depression in freezing point of an aqueous solution containing a solute, which is neither dissociated nor associated, is with , what 2023 (Evening Shift)Colligative Properties and Abnormal Molecular Masses
  47. 47Choose the incorrect statement:2023 (Evening Shift)Henry's law
  48. 48What is the mole fraction of solute in a aqueous solution?2023 (Evening Shift)Solubility and Concentration of Solutions
  49. 49is an electrolyte with a concentration of whose formula is of the type . is a non-electrolyte solution with a concentration of and has an os2023 (Evening Shift)Colligative Properties and Abnormal Molecular Masses
  50. 50What would be the van't Hoff factor for a solution prepared by dissolving of in of water having an Osmotic pressure equal to . at ? Molar ma2023 (Evening Shift)Colligative Properties and Abnormal Molecular Masses

Frequently Asked Questions

1.How many questions are available for Solutions?

This chapter includes 79 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 Solutions chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Solutions an important chapter for COMEDK Chemistry?

Solutions has appeared in 12 of the 15 years of COMEDK papers covered here, with 79 questions across 21 papers - about 4 per paper it appears in.

4.What is the difficulty level of Solutions questions in COMEDK?

Of the 79 questions analysed for this chapter, 22% are easy, 71% moderate and 8% tough. 2025 had the most, with 20 questions.

5.Which topics in Solutions should I focus on?

These topics have carried the most weightage in Solutions:

  • Colligative Properties and Abnormal Molecular Masses - 42 questions (53%)
  • Vapour pressure and raoult's law - 19 questions (24%)
  • Henry's law - 9 questions (11%)
  • Vapour pressure and raoult's law has produced the most tough questions (4).
6.Is Solutions's weightage in COMEDK going up or down?

Across all 21 papers analysed, Solutions has averaged about 3.8 questions per paper. In the last three years (2024–2026), that average has risen, at about 4.5 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.