Solutions & Colligative Properties — JEE Main PYQs & Practice Questions

Solutions & Colligative Properties is a Chemistry chapter in the JEE Main syllabus. This page brings together 151 previous-year and practice questions on Solutions & Colligative Properties, organised into 7 topics: Concentration Units, Raoult's Law, Henry's Law, Elevation in Boiling Point, Depression in Freezing Point, Osmotic Pressure and Van't Hoff Factor. Most questions come with a step-by-step solution you can work through free in PrepWiser.

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Chapter weightage: how many questions each chapter had per shift in the 2024–26 papers.

Concentration Units

• The number of units, which are used to express concentration of solutions from the…
• The density of 3 M solution of NaCl is 1.0 g mL⁻¹. Molality of the solution is…
• 10.30 mg of O₂ is dissolved into a liter of sea water of density 1.03 g/mL. The…
• A 6.50 molal solution of KOH (aq.) has a density of 1.89 g cm⁻³. The molarity of the…
• Molality of 0.8 M H₂SO₄ solution (density 1.06 g cm⁻³) is ________ ×10⁻³ m.
• Density of 3 M NaCl solution is 1.25 g / mL. The molality of the solution is :
• Molality (m) of 3 M aqueous solution of NaCl is : (Given : Density of solution =1.25 g…
• Sea water, which can be considered as a 6 molar (6 M) solution of NaCl , has a density…
• The density of NaOH solution is 1.2 g cm⁻³. The molality of this solution is…
• ' x ' g of NaCl is added to water in a beaker with a lid. The temperature of the system…
• Given below are two statements : one is labelled as Assertion (A) and the other is…

Raoult's Law

• Which of the following binary mixture does not show the behaviour of minimum boiling…
• The total pressure observed by mixing two liquids A and B is 350 mm Hg when their mole…
• A solution is made by mixing one mole of volatile liquid A with 3 moles of volatile…
• A set of solutions is prepared using 180 g of water as a solvent and 10 g of different…
• The vapour pressure vs. temperature curve for a solution solvent system is shown below…
• The vapour pressure of 30 %(w / v) aqueous solution of glucose is __________ mm Hg at…
• Match List - I with List - II . List - I | List - II; (A) Solution of chloroform and…
• A gaseous mixture of two substances A and B, under a total pressure of 0.8 atm is in…
• At 300 K, the vapour pressure of a solution containing 1 mole of n-hexane and 3 moles of…
• Mass of Urea (NH₂ CONH₂) required to be dissolved in 1000 g of water in order to reduce…
• At T(K),2 moles of liquid A and 3 moles of liquid B are mixed. The vapour pressure of…
• Identify the mixture that shows positive deviations from Raoult's Law
• Two liquids A and B form an ideal solution at temperature T K . At T K , the vapour…
• Liquid A and B form an ideal solution. The vapour pressures of pure liquids A and B are…
• Two liquids A and B form an ideal solution. At 320 K , the vapour pressure of the…
• Which one of the following graphs accurately represents the plot of partial pressure of…
• When a non-volatile solute is added to the solvent, the vapour pressure of the solvent…
• When 0.25 moles of a non-volatile, non-ionizable solute was dissolved in 1 mole of a…
• A solution of two miscible liquids showing negative deviation from Raoult's law will…
• Two open beakers one containing a solvent and the other containing a mixture of that…

Henry's Law

• CO₂ gas is bubbled through water during a soft drink manufacturing process at 298 K. If…
• The oxygen dissolved in water exerts a partial pressure of 20 kPa in the vapour above…
• For a solution of the gases A, B, C and D in water at 298 K, the values of Henry's law…
• A company dissolves 'x' amount of CO₂ at 298 K in 1 litre of water to prepare soda…
• At 298 K , the mole percentage of N₂( g) in air is 80%. Water is in equilibrium with air…
• Which of the following graph correctly represents the plots of K_H at 1 bar for gases in…
• If O₂ gas is bubbled through water at 303 K, the number of millimoles of O₂ gas that…
• Given below are two statements : Statement I : The Henry's law constant K_H is constant…
• Consider a solution of CO₂( g) dissolved in water in a closed container. Which one of…

Elevation in Boiling Point

• A solution containing 2 g of a non-volatile solute in 20 g of water boils at 373.52 K…
• 2 moles each of ethylene glycol and glucose are dissolved in 500 g of water. The boiling…
• Evaluate the following statements for their correctness. A. The elevation in boiling…
• If the boiling points of two solvents X and Y (having same molecular weights) are in the…
• Which of the following statements are not correct? A. For water, magnitude of K_b is…
• 1.24 g of AX₂ (molar mass 124 g mol⁻¹) is dissolved in 1 kg of water to form a solution…
• 1 molal aqueous solution of an electrolyte A₂B₃ is 60% ionised. The boiling point of the…
• Boiling point of a 2 % aqueous solution of a non-volatile solute A is equal to the…
• 2 g of a non-volatile non-electrolyte solute is dissolved in 200 g of two different…
• Consider the following aqueous solutions. I. 2.2 g Glucose in 125 mL of solution. II…
• If a compound AB dissociates to the extent of 75% in an aqueous solution, the molality…
• A non-volatile, non-electrolyte solid solute when dissolved in 40 g of a solvent, the…
• A substance 'X' (1.5 g) dissolved in 150 g of a solvent 'Y' (molar mass = 300 g mol⁻¹)…
• When 3.00 g of a substance 'X' is dissolved in 100 g of CCl₄, it raises the boiling…
• Elevation in boiling point for 1.5 molal solution of glucose in water is 4 K. The…
• A solution containing 10 g of an electrolyte AB₂ in 100 g of water boils at 100.52° C…
• 1.22 g of an organic acid is separately dissolved in 100 g of benzene (K b = 2.6 K kg…
• AB₂ is 10% dissociated in water to A²⁺ and B⁻. The boiling point of a 10.0 molal aqueous…
• Arrange the following solutions in order of their increasing boiling points. (i) 10⁻⁴ M…
• The elevation in boiling point for 1 molal solution of non-volatile solute A is 3 K. The…

Depression in Freezing Point

• Two solutions A and B are prepared by dissolving 1 g of non-volatile solutes X and Y…
• C₆H₆ freezes at 5.5°C. The temperature at which a solution of 10g of C₄H₁₀ in 200g of…
• 1.80 g of solute A was dissolved in 62.5 cm³ of ethanol and freezing point of the…
• 83 g of ethylene glycol dissolved in 625 g of water. The freezing point of the solution…
• When 12.2 g of benzoic acid is dissolved in 100 g of water, the freezing point of…
• What happens to freezing point of benzene when small quantity of napthalene is added to…
• A 0.5 percent solution of potassium chloride was found to freeze at -0.24°C. The…
• Which one of the following 0.06 M aqueous solutions has lowest freezing point?
• When 9.45 g of CICH₂COOH is added to 500 mL of water, its freezing point drops by 0.5°C…
• 25 mL of an aqueous solution of KCl was found to require 20 mL of 1 M AgNO₃ solution…
• 1 kg of 0.75 molal aqueous solution of sucrose can be cooled up to -4°C before freezing…
• Solid Lead nitrate is dissolved in 1 litre of water. The solution was found to boil at…
• When 'x' × 10⁻² mL methanol (molar mass =32 g' density =0.792 g / cm³) is added to 100…
• 2.7 kg of each of water and acetic acid are mixed. The freezing point of the solution…
• Of the following four aqueous solutions, total number of those solutions whose freezing…
• 2 molal solution of a weak acid HA has a freezing point of 3.885°C. The degree of…
• What is the freezing point depression constant of a solvent, 50 g of which contain 1 g…
• Which one of the following 0.10 M aqueous solutions will exhibit the largest freezing…
• Considering acetic acid dissociates in water, its dissociation constant is 6.25 × 10⁻⁵…
• 20 % of acetic acid is dissociated when its 5 g is added to 500 mL of water. The…

Osmotic Pressure

• Solution A is prepared by dissolving 1 g of a protein (molar mass = 50,000 g mol⁻¹) in…
• The number of pairs of the solutions having the same value of the osmotic pressure from…
• 1.46 g of a biopolymer dissolved in a 100 mL water at 300 K exerted an osmotic pressure…
• The osmotic pressure of a solution of NaCl is 0.10 atm and that of a glucose solution is…
• 20 g hemoglobin in a 1 L aqueous solution (A) at 300 K is separated from pure water by…
• Consider the dissociation of the weak acid HX as given below HX(aq) ⇌ H⁺(aq)+X⁻(aq)…
• An aqueous solution of volume 300 cm³ contains 0.63 g of protein. The osmotic pressure…
• A solution is prepared by dissolving 0.3 g of a non-volatile non-electrolyte solute 'A'…
• Consider the following pairs of solution which will be isotonic at the same temperature…
• The osmotic pressure exerted by a solution prepared by dissolving 2.0 g of protein of…
• The osmotic pressure of a living cell is 12 atm at 300 K. The strength of sodium…
• The osmotic pressure of solutions of PVC in cyclohexanone at 300 K are plotted on the…
• 2.5 g of protein containing only glycine (C₂H₅NO₂) is dissolved in water to make 500 mL…
• At 27°C,0.1M,1 L K₄[Fe(CN)₆] aqueous solution and 0.1M,1 LFeCl₃ aqueous solution are…
• Given below are two statements : Statement I : H₂O molecules move from the chamber 1 to…
• 0.05 M CuSO₄ when treated with 0.01 M K₂ Cr₂ O₇ gives green colour solution of Cu₂ Cr₂…
• X Y is the membrane/partition between two chambers 1 and 2 containing sugar solutions of…
• If 250 cm³ of an aqueous solution containing 0.73 g of a protein A is isotonic with one…
• The osmotic pressure of blood is 7.47 bar at 300 K. To inject glucose to a patient…
• The osmotic pressure of a dilute solution is 7 × 10⁵ Pa at 273 K. Osmotic pressure of…

Van't Hoff Factor

• ' W ' g of a non-volatile electrolyte solid solute of molar mass ' M ' gmol⁻¹ when…
• If A₂B is 30% ionised in an aqueous solution, then the value of van't Hoff factor (i) is…
• 0.004 M K₂SO₄ solution is isotonic with 0.01 M glucose solution. Percentage dissociation…
• Match List I with List II List I | List II; A. | van't Hoff factor, i | I. | Cryoscopic…
• The percentage dissociation of a salt (MX₃) solution at given temperature (van't Hoff…
• 19.5 g of fluoro acetic acid (molar mass = 78 g mol⁻¹) is dissolved in 500 g of water at…
• We have three aqueous solutions of NaCl labelled as ' A ', ' B ' and ' C ' with…
• In a solvent 50% of an acid HA dimerizes and the rest dissociates. The van't Hoff factor…
• The observed and normal molar masses of compound MX₂ are 65.6 and 164 respectively. The…
• 80 mole percent of MgCl₂ is dissociated in aqueous solution. The vapour pressure of 1.0…

More Chemistry chapters

• Mole Concept & Stoichiometry
• Atomic Structure
• Gaseous State
• Chemical Thermodynamics
• Chemical Equilibrium
• Ionic Equilibrium
• Redox Reactions
• Electrochemistry
• Chemical Kinetics
• Solid State
• Surface Chemistry
• Nuclear & Radiochemistry
• Periodic Table & Periodicity
• Chemical Bonding & Molecular Structure
• Hydrogen & s-Block Elements
• p-Block Elements — Part I (Group 13 & 14)
• Environmental Chemistry
• p-Block Elements — Part II (Group 15-18)
• d & f Block Elements
• Coordination Compounds
• Metallurgy
• Qualitative Analysis — Salt Analysis
• Purification & Characterisation of Organic Compounds
• General Organic Chemistry (GOC)
• Hydrocarbons — Alkanes
• Hydrocarbons — Alkenes & Alkynes
• Hydrocarbons — Aromatic (Arenes)
• Halogen Derivatives — Haloalkanes & Haloarenes
• Alcohols, Phenols & Ethers
• Aldehydes & Ketones
• Carboxylic Acids & Their Derivatives
• Amines & Diazonium Salts
• Carbohydrates & Biomolecules
• Polymers
• Chemistry in Everyday Life
• Practical Organic Chemistry

Frequently asked questions

How many Solutions & Colligative Properties questions are there for JEE Main?

PrepWiser has 151 Solutions & Colligative Properties questions for JEE Main, grouped into 7 topics such as Concentration Units, Raoult's Law and Henry's Law.

Are these Solutions & Colligative Properties questions from previous-year JEE Main papers?

Yes — most are genuine previous-year questions from past JEE Main papers, and the rest are practice questions written to match the JEE Main pattern and difficulty.

Where can I see the answers and solutions to these Solutions & Colligative Properties questions?

Open any Solutions & Colligative Properties question in PrepWiser (it is free) to attempt it; most come with a step-by-step solution.