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Chemistry - Solutions

Practise 231 JEE Main previous year questions on Solutions, 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 JEE Main tests.

Solutions has been asked in 25 of the 25 years of JEE Main papers analysed (2002–2026), with 231 questions in all. 28% of them were easy, 60% moderate and 12% tough. Most of its questions came from 2023, with 31 questions that year. In the last three years (2024–2026) it had 61 questions across 49 papers, about 1.2 per paper.

The chapter's 4 topics are not weighted equally: Colligative Properties and Abnormal Molecular Masses (126 questions, 55%), Vapour pressure and raoult's law (62 questions, 27%), and Solubility and Concentration of Solutions (31 questions, 13%) have been asked the most. Colligative Properties and Abnormal Molecular Masses has also led over the last five years, with 71 questions. Colligative Properties and Abnormal Molecular Masses has produced the most tough questions (17).

  1. 1Given below are two statements: Given: Molar mass of C, H, O, Cl are and g mol , respectively. Statement I: In (w/w) solution of methanol in08 Apr, 2026 (E)Solubility and Concentration of Solutions
  2. 2Which of the following statements are not correct? A. For water, magnitude of is more than the magnitude of . B. The elevation in boiling po08 Apr, 2026 (E)Colligative Properties and Abnormal Molecular Masses
  3. 3When moles of a non-volatile, non-ionizable solute was dissolved in mole of a solvent the vapor pressure of solution was of vapor pressure o06 Apr, 2026 (M)Vapour pressure and raoult's law
  4. 4Given below are two statements : Statement I : H O molecules move from the chamber to chamber . Statement II : The osmotic pressure of a sol06 Apr, 2026 (E)Colligative Properties and Abnormal Molecular Masses
  5. 5What is the mole fraction of water in % by weight (w/w) of aqueous urea solution? [Given: Molar mass of H, O, C and N are , , and g mol resp05 Apr, 2026 (M)Solubility and Concentration of Solutions
  6. 6hemoglobin in a aqueous solution (A) at is separated from pure water by semi permeable membrane. At equilibrium the height of solution in a 05 Apr, 2026 (E)Colligative Properties and Abnormal Molecular Masses
  7. 7A non-volatile, non-electrolyte solid solute when dissolved in g of a solvent, the vapour pressure of the solvent decreased from mm Hg to mm04 Apr, 2026 (M)Vapour pressure and raoult's law
  8. 8At C, M, L aqueous solution and M, L aqueous solution are placed in a container separated by a semi permeable membrane AB. Assume complete d04 Apr, 2026 (E)Colligative Properties and Abnormal Molecular Masses
  9. 9g of fluoro acetic acid (molar mass g mol ) is dissolved in g of water at K. The depression in the freezing point of water was C. What is of02 Apr, 2026 (M)Colligative Properties and Abnormal Molecular Masses
  10. 10Given below are two statements : Statement (I) : 1,2,3-Trihydroxypropane can be separated from water by simple distillation. Statement (II) 02 Apr, 2026 (M)Vapour pressure and raoult's law
  11. 11Solution A is prepared by dissolving g of a protein (molar mass g mol ) in L of water at K. Its osmotic pressure is bar. Solution B is made 02 Apr, 2026 (E)Colligative Properties and Abnormal Molecular Masses
  12. 12At moles of liquid A and 3 moles of liquid B are mixed. The vapour pressure of ideal solution formed is 320 mm Hg. At this stage, one mole o28 Jan, 2026 (M)Vapour pressure and raoult's law
  13. 13Consider the following aqueous solutions. I. 2.2 g Glucose in 125 mL of solution. II. 1.9 g Calcium chloride in 250 mL of solution. III. 9.028 Jan, 2026 (E)Colligative Properties and Abnormal Molecular Masses
  14. 14A solution is prepared by dissolving 0.3 g of a non-volatile non-electrolyte solute 'A' of molar mass and 0.9 g of a non-volatile non-electr24 Jan, 2026 (M)Colligative Properties and Abnormal Molecular Masses
  15. 15' W ' g of a non-volatile electrolyte solid solute of molar mass ' M ' when dissolved in 100 mL water, decreases vapour pressure of water fr24 Jan, 2026 (M)Colligative Properties and Abnormal Molecular Masses
  16. 16At 298 K, the mole percentage of in air is . Water is in equilibrium with air at a pressure of 10 atm. What is the mole fraction of in water24 Jan, 2026 (E)Henry's law
  17. 17Two liquids A and B form an ideal solution at temperature T K. At T K, the vapour pressures of pure A and B are 55 and respectively. What is24 Jan, 2026 (E)Vapour pressure and raoult's law
  18. 18Which one of the following graphs accurately represents the plot of partial pressure of vs its mole fraction in a mixture of acetone and at 23 Jan, 2026 (M)Vapour pressure and raoult's law
  19. 19Two liquids A and B form an ideal solution. At 320 K, the vapour pressure of the solution, containing 3 mol of A and 1 mol of B is 500 mm Hg23 Jan, 2026 (E)Vapour pressure and raoult's law
  20. 20Consider a solution of dissolved in water in a closed container. Which one of the following plots correctly represents variation of log (par22 Jan, 2026 (M)Henry's law
  21. 21Given below are two statements: Statement I : The Henry's law constant is constant with respect to variations in solution's concentration ov22 Jan, 2026 (M)Henry's law
  22. 22At of aqueous solution is mixed with 100 g of aqueous solution. What is the mole fraction of in the resultant solution? (Given : Atomic mass22 Jan, 2026 (E)Solubility and Concentration of Solutions
  23. 23Elements P and Q form two types of non-volatile, non-ionizable compounds PQ and . When 1 g of PQ is dissolved in 50 g of solvent was 1.176 K21 Jan, 2026 (M)Colligative Properties and Abnormal Molecular Masses
  24. 24A substance ' X ' (1.5 g) dissolved in 150 g of a solvent ' Y ' (molar mass ) led to an elevation of the boiling point by 0.5 K. The relativ21 Jan, 2026 (E)Colligative Properties and Abnormal Molecular Masses
  25. 25The osmotic pressure of a living cell is 12 atm at 300 K. The strength of sodium chloride solution that is isotonic with the living cell at 21 Jan, 2026 (E)Colligative Properties and Abnormal Molecular Masses
  26. 26Which of the following binary mixture does not show the behaviour of minimum boiling azeotropes?08 Apr, 2025 (E)Vapour pressure and raoult's law
  27. 27Preview not available - open to view this question.08 Apr, 2025 (E)Colligative Properties and Abnormal Molecular Masses
  28. 28The percentage dissociation of a salt solution at given temperature (van't Hoff factor 2) is ______ % (Nearest integer)07 Apr, 2025 (M)Colligative Properties and Abnormal Molecular Masses
  29. 29Liquid A and B form an ideal solution. The vapour pressure of pure liquids A and B are 350 and 750 mm Hg respectively at the same temperatur07 Apr, 2025 (E)Vapour pressure and raoult's law
  30. 30Match List-I with List-II Choose the correct answer from the options given below :07 Apr, 2025 (E)Vapour pressure and raoult's law
  31. 31is the membrane / partition between two chambers 1 and 2 containing sugar solutions of concentration and . For the reverse osmosis to take p04 Apr, 2025 (M)Colligative Properties and Abnormal Molecular Masses
  32. 32Sea water, which can be considered as a 6 molar solution of NaCl , has a density of . The concentration of dissolved oxygen in sea water is 04 Apr, 2025 (E)Solubility and Concentration of Solutions
  33. 33Given below are two statements : Statement (I) : Molal depression constant is given by , where symbols have their usual meaning. Statement (04 Apr, 2025 (E)Colligative Properties and Abnormal Molecular Masses
  34. 342 moles each of ethylene glycol and glucose are dissolved in 500 g of water. The boiling point of the resulting solution is : (Given : Ebull03 Apr, 2025 (M)Colligative Properties and Abnormal Molecular Masses
  35. 35A solution is made by mixing one mole of volatile liquid \(A\) with 3 moles of volatile liquid \(B\). The vapour pressure of pure A is 200 m02 Apr, 2025 (M)Vapour pressure and raoult's law
  36. 36Which of the following graph correctly represents the plots of \( {K}_{ {H}}\) at 1 bar gases in water versus temperature?02 Apr, 2025 (M)Henry's law
  37. 37When 1 g each of compounds AB and are dissolved in 15 g of water separately, they increased the boiling point of water by 2.7 K and 1.5 K re02 Apr, 2025 (E)Colligative Properties and Abnormal Molecular Masses
  38. 38' x ' g of NaCl is added to water in a beaker with a lid. The temperature of the system is raised from to . Which out of the following plots02 Apr, 2025 (E)Solubility and Concentration of Solutions
  39. 391.24 g of \( {AX}_2\) (molar mass \(124 {~g} {~mol}^{-1}\) ) is dissolved in 1 kg of water to form a solution with boiling point of \(100.0129 Jan, 2025 (M)Colligative Properties and Abnormal Molecular Masses
  40. 40If \(A_2 B\) is \(30 \%\) ionised in an aqueous solution, then the value of van't Hoff factor (i) is ______ \( 10^{-1}\).29 Jan, 2025 (M)Colligative Properties and Abnormal Molecular Masses
  41. 41Given below are two statements : Statement (I) : NaCl is added to the ice at , present in the ice cream box to prevent the melting of ice cr29 Jan, 2025 (E)Colligative Properties and Abnormal Molecular Masses
  42. 42What is the freezing point depression constant of a solvent, 50 g of which contain 1 g non volatile solute (molar mass ) and the decrease in28 Jan, 2025 (M)Colligative Properties and Abnormal Molecular Masses
  43. 43Assume a living cell with of glucose solution (aqueous). This cell is immersed in another solution having equal mole fraction of glucose and28 Jan, 2025 (E)Solubility and Concentration of Solutions
  44. 44Consider the given plots of vapour pressure (VP) vs temperature(T/K). Which amongst the following options is correct graphical representatio24 Jan, 2025 (M)Colligative Properties and Abnormal Molecular Masses
  45. 45The observed and normal molar masses of compound are 65.6 and 164 respectively. The percent degree of ionisation of is %. (Nearest integer)24 Jan, 2025 (E)Colligative Properties and Abnormal Molecular Masses
  46. 46Consider a binary solution of two volatile liquid components 1 and and are the mole fractions of component 1 in liquid and vapour phase, res23 Jan, 2025 (E)Vapour pressure and raoult's law
  47. 47When a non-volatile solute is added to the solvent, the vapour pressure of the solvent decreases by 10 mm of Hg . The mole fraction of the s23 Jan, 2025 (E)Vapour pressure and raoult's law
  48. 48Arrange the following solutions in order of their increasing boiling points. (i) (ii) Urea (iii) (iv)22 Jan, 2025 (M)Colligative Properties and Abnormal Molecular Masses
  49. 49The vapour pressure of pure benzene and methyl benzene at \(27^{ } {C}\) is given as 80 Torr and 24 Torr, respectively. The mole fraction of09 Apr, 2024 (E)Vapour pressure and raoult's law
  50. 50A solution containing \(10 {~g}\) of an electrolyte \( {AB}_2\) in \(100 {~g}\) of water boils at \(100.52^{ } {C}\). The degree of ionizati08 Apr, 2024 (M)Colligative Properties and Abnormal Molecular Masses

Frequently Asked Questions

1.How many questions are available for Solutions?

This chapter includes 231 questions compiled from JEE Main papers spanning 2002 to 2026.

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

These are JEE Main questions specifically for the Solutions chapter. Questions from other exams like NTA Abhyas (JEE Main) or JEE Advanced are organised separately under their respective exam sections.

3.Is Solutions an important chapter for JEE Main Chemistry?

Solutions has appeared in 25 of the 25 years of JEE Main papers covered here, with 231 questions across 182 papers - about one per paper it appears in.

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

Of the 231 questions analysed for this chapter, 28% are easy, 60% moderate and 12% tough. 2023 had the most, with 31 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 - 126 questions (55%)
  • Vapour pressure and raoult's law - 62 questions (27%)
  • Solubility and Concentration of Solutions - 31 questions (13%)
  • Colligative Properties and Abnormal Molecular Masses has produced the most tough questions (17).
6.Is Solutions's weightage in JEE Main going up or down?

Across all 182 papers analysed, Solutions has averaged about 1.3 questions per paper. In the last three years (2024–2026), that average has stayed about the same, at about 1.2 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.