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Friday, 9 October

JEE Main Chemistry · Solutions

Colligative Properties in JEE Main

Colligative Properties (Chemistry, Solutions) came 36 times in 36 of the 42 JEE Main shifts Lumi analysed, across 16 distinct ideas. 21 of them came in 2024–26; it was last asked in 2026.

Questions
36
in 36 shifts
Ideas asked
16
8 asked more than once
Numerical answer
17
47% of its questions
Pattern
Asked most years
last asked 2026
Questions each year
0481’174’202’214’224’236’247’258’26

In the shifts Lumi analysed for each year.

Difficulty and format
Easy 9Medium 26Hard 1

Format

  • Numerical value17 Q
  • Single correct15 Q
  • Two statements2 Q
  • Other2 Q
Ideas inside the topic
16 ideas
Where it sits

Part of Solutions, which had 53 questions in all. Colligative Properties accounts for 68% of them. In Lumi's JEE taxonomy it belongs to Inorganic Chemistry.

Some questions sit in other chapters too: States of Matter.

Every question

All 36 Colligative Properties questions

Newest first, each with its options and official answer.

  1. 2 Apr 2026, Shift 1 · Q5519.519.5 g of fluoro acetic acid (molar mass =78 g mol−1=78\ \mathrm{g\ mol^{-1}}) is dissolved in 500500 g of water at 298298 K. The depression in the…MediumSingle correct
  2. 2 Apr 2026, Shift 2 · Q55Solution A is prepared by dissolving 1 g of a protein (molar mass = 50000 g mol−1^{-1}) in 0.5 L of water at 300 K. Its osmotic pressure…EasySingle correct
  3. 4 Apr 2026, Shift 1 · Q75A non-volatile, non-electrolyte solid solute when dissolved in 4040 g of a solvent, the vapour pressure of the solvent decreased from…MediumNumerical value
  4. 4 Apr 2026, Shift 2 · Q54At 27 ∘^\circC, 0.1 M, 1 L K4[Fe(CN)6]\mathrm{K_4[Fe(CN)_6]} aqueous solution and 0.1 M, 1 L FeCl3\mathrm{FeCl_3} aqueous solution are placed in a…MediumSingle correctHas a figure
  5. 5 Apr 2026, Shift 2 · Q7320 g hemoglobin in a 1 L aqueous solution (A) at 300 K is separated from pure water by semi permeable membrane. At equilibrium the height…MediumNumerical value
  6. 6 Apr 2026, Shift 1 · Q56When 0.25 moles of a non-volatile, non-ionizable solute was dissolved in 1 mole of a solvent the vapor pressure of solution was xx % of…EasySingle correct
  7. 6 Apr 2026, Shift 2 · Q55Given below are two statements : Statement I : H2O\mathrm{H_2O} molecules move from the chamber 1 to chamber 2. Statement II : The osmotic…MediumTwo statementsHas a figure
  8. 8 Apr 2026, Shift 2 · Q54Which of the following statements are not correct ? A. For water, magnitude of Kb\mathrm{K_b} is more than the magnitude of…MediumOtherHas a figure
  9. 2 Apr 2025, Shift 1 · Q55A 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 mm Hg…MediumSingle correct
  10. 2 Apr 2025, Shift 2 · Q73When 1 g each of compounds AB and AB2\mathrm{AB_2} are dissolved in 15 g of water separately, they increased the boiling point of water by…MediumNumerical value
  11. 3 Apr 2025, Shift 1 · Q542 moles each of ethylene glycol and glucose are dissolved in 500 g of water. The boiling point of the resulting solution is: (Given :…EasySingle correct
  12. 4 Apr 2025, Shift 2 · Q53Given below are two statements : Statement (I) : Molal depression constant KfK_f is given by M1RTfΔSfus\frac{M_1RT_f}{\Delta S_{fus}}, where…MediumTwo statements
  13. 7 Apr 2025, Shift 1 · Q72The percentage dissociation of a salt (MX3\mathrm{MX_3}) solution at given temperature (van't Hoff factor i=2i = 2) is ___________ %(Nearest…EasyNumerical value
  14. 7 Apr 2025, Shift 2 · Q55Liquid A and B form an ideal solution. The vapour pressures of pure liquids A and B are 350 and 750 mm Hg respectively at the same…MediumSingle correct
  15. 8 Apr 2025, Shift 2 · Q53HA(aq)⇌H+(aq)+A−(aq)\mathrm{HA(aq) \rightleftharpoons H^+(aq) + A^-(aq)} The freezing point depression of a 0.1 m aqueous solution of a monobasic weak acid…MediumSingle correct
  16. 6 Apr 2024, Shift 2 · Q84When 'xx' ×10−2\times 10^{-2} mL methanol (molar mass =32= 32 g; density =0.792= 0.792 g/cm3^3) is added to 100 mL water (density =1= 1…MediumNumerical valueHas a figure
  17. 8 Apr 2024, Shift 1 · Q84A solution containing 10 g of an electrolyte AB2\mathrm{AB_2} in 100 g of water boils at 100.52∘100.52^\circC. The degree of ionization of the…MediumNumerical value
  18. 9 Apr 2024, Shift 1 · Q630.05M CuSO40.05\mathrm{M}\ \mathrm{CuSO_4} when treated with 0.01M K2Cr2O70.01\mathrm{M}\ \mathrm{K_2Cr_2O_7} gives green colour solution of…MediumSingle correctHas a figure
  19. 9 Apr 2024, Shift 2 · Q84The vapor pressure of pure benzene and methyl benzene at 27∘27^\circC is given as 80 Torr and 24 Torr, respectively. The mole fraction of…MediumNumerical value
  20. 29 Jan 2024, Shift 1 · Q84The osmotic pressure of a dilute solution is 7×1057\times10^{5} Pa at 273K. Osmotic pressure of the same solution at 283K is ________…EasyNumerical value
  21. 30 Jan 2024, Shift 2 · Q64The solution from the following with highest depression in freezing point/lowest freezing point isMediumSingle correct
  22. 6 Apr 2023, Shift 1 · Q85Mass of Urea (NH2CONH2\mathrm{NH_2CONH_2}) required to be dissolved in 1000 g of water in order to reduce the vapour pressure of water by 25% is…MediumNumerical value
  23. 8 Apr 2023, Shift 2 · Q84If the boiling points of two solvents X and Y (having same molecular weights) are in the ratio 2:1 and their enthalpy of vaporizations are…MediumNumerical value
  24. 11 Apr 2023, Shift 1 · Q840.004 M K2SO4\mathrm{K_2SO_4} solution is isotonic with 0.01 M glucose solution. Percentage dissociation of K2SO4\mathrm{K_2SO_4} is…MediumNumerical value
  25. 13 Apr 2023, Shift 2 · Q84Sea water contains 29.25% NaCl and 19% MgCl2\mathrm{MgCl_2} by weight of solution. The normal boiling point of the sea water is ______…MediumNumerical value
  26. 25 Jul 2022, Shift 1 · Q63The depression in freezing point observed for a formic acid solution of concentration 0.5 mL L−10.5\ \mathrm{mL\,L^{-1}} is 0.0405∘0.0405^\circC.…MediumSingle correct
  27. 28 Jul 2022, Shift 1 · Q84150 g of acetic acid was contaminated with 10.2 g ascorbic acid (C6H8O6\mathrm{C_6H_8O_6}) to lower down its freezing point by…EasyNumerical value
  28. 24 Jun 2022, Shift 1 · Q83The osmotic pressure of blood is 7.47 bar at 300 K. To inject glucose to a patient intravenously, it has to be isotonic with blood. The…EasyNumerical value
  29. 29 Jun 2022, Shift 1 · Q831.2 mL of acetic acid is dissolved in water to make 2.0 L of solution. The depression in freezing point observed for this strength of acid…MediumNumerical value
  30. 3 Aug 2021, Shift 2 · Q32The lowest freezing point among the following solutions will be observed in [Atomic weight : C = 12, Mg = 24, Na = 23, Cl = 35.5, O = 16,…EasySingle correct
  31. 18 Mar 2021, Shift 1 · Q542 molal solution of a weak acid HA has a freezing point of 3.885°C. The degree of dissociation of this acid is __________ ×10−3\times10^{-3}.…MediumNumerical value
  32. 8 Jan 2020, Shift 1 · Q31A graph of vapour pressure and temperature for three different liquids X, Y, and Z is shown below : The following inferences are made :…MediumOtherHas a figure
  33. 9 Jan 2020, Shift 2 · Q46A cylinder containing an ideal gas (0.1 mol of 1.0 dm3^3) is in thermal equilibrium with a large volume of 0.5 molal aqueous solution of…HardNumerical valueHas a figure
  34. 2 Sep 2020, Shift 1 · Q26An open beaker of water in equilibrium with water vapour is in a sealed container. When a few grams of glucose are added to the beaker of…MediumSingle correct
  35. 6 Sep 2020, Shift 2 · Q43A set of solutions is prepared using 180 g of water as a solvent and 10 g of different non-volatile solutes A, B and C. The relative…EasySingle correct
  36. 2 Apr 2017 (offline) · Q37The freezing point of benzene decreases by 0.45°C when 0.2 g of acetic acid is added to 20 g of benzene. If acetic acid associates to form…MediumSingle correct