Solutions & Colligative Properties JEE Main PYQs PDF, 2020–2026

Solutions & Colligative Properties has 153 questions in JEE Main papers from 2020 to 2026, about 22 per year across all shifts. The free PDF has 150 of them, each with its answer. The most asked topic is Depression in Freezing Point (36 questions), followed by Raoult's Law (33) and Elevation in Boiling Point (28).

Asked in JEE Main: 1532020–2026, all shifts
In this free PDF: 150with answers
Asked in 2026: 22Latest paper: 2026 Apr S2
Most asked topic: Depression in Freezing Point36 Qs · 23% of the chapter
Difficulty mix: 39% easy · 60% medium · 1% hardof the questions in the PDF

Answer key includedNo loginPractise online

Source: official NTA JEE Main papers · Updated 17 Oct 2026

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8 of this chapter's questions came back in a later paper (2021–2026). See the most repeated.

How often it's asked in JEE Main

Solutions & Colligative Properties had about 1.1 questions per shift in recent JEE Main papers (2024–26). Most asked topic in 2024–26: Raoult's Law. About 22 questions in the 2026 papers.

It came up in most 2024–26 shifts in our bank (about 51 shifts). Question types in 2020–2026: about 62 MCQs and about 91 numerical.

How many questions from Solutions & Colligative Properties in JEE Main, year by year

Year	Questions	Per shift	MCQ	Numerical
2026	22	1.2	17	5
2025	25	1.3	20	5
2024	18	0.9	7	11
2023	26	1.1	4	22
2022	22	1.0	6	16
2021	27	1.0	2	25
2020	13	0.8	6	7
2020–2026	153	1.0	62	91

Most asked Solutions & Colligative Properties topics, 2020–2026

Topic	Questions
Depression in Freezing Point	36
Raoult's Law	33
Elevation in Boiling Point	28
Osmotic Pressure	26
Concentration Units	11

Every topic, year by year, is in the topic-wise table further down.

Counted from PrepWiser's question bank of JEE Main papers, 2020–2026. Per shift = questions that year ÷ shifts in our bank. Updated 17 Oct 2026.

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Two free sheets, made from the past JEE Main questions on this chapter.

Revision notes11 pages, 21 ideas with the usual mistakes.Open the revision notes Formula sheet2 pages, all 21 formulas.Open the formula sheet

Solutions & Colligative Properties questions per year

Year	Asked	In PDF
2026	22	22
2025	25	24
2024	18	18
2023	26	26
2022	22	22
2021	27	26
2020	13	12

in the free PDF asked, not in the PDFThe PDF only has questions we can print in full with a checked answer, so it holds 150 of the 153 asked.

Topic-wise weightage by year

How many Solutions & Colligative Properties questions each topic had in every JEE Main year (all shifts), counting every question asked, including ones not in the PDF. Darker cells mean more questions.

Topic	Asked	Share	2026	2025	2024	2023	2022	2021	2020
Depression in Freezing Point	36	23%	·	5	6	6	7	10	2
Raoult's Law	33	22%	6	6	3	5	3	4	6
Elevation in Boiling Point	28	18%	5	4	2	4	5	7	1
Osmotic Pressure	26	17%	6	3	4	6	3	1	3
Concentration Units	11	7%	·	3	2	2	1	2	1
Van't Hoff Factor	10	7%	2	3	1	3	·	1	·
Henry's Law	9	6%	3	1	·	·	3	2	·
All topics	153	100%	22	25	18	26	22	27	13

Swipe the table sideways for older years.

Newest questions (2026)

The 12 newest of the 22 JEE Main 2026 Solutions & Colligative Properties questions in the free PDF, latest shift first.

JEE Main 2026 · 8 Apr · Shift 2 · Elevation in Boiling Point

Which of the following statements are not correct?

A. For water, magnitude of ${\mathrm{K}}_{{{\mathrm{b}}}}$ is more than the magnitude of ${\mathrm{K}}_{{{\mathrm{f}}}}$ .

B. The elevation in boiling point of water when a non-volatile solute is added to it is larger in magnitude than its depression in freezing point.

C. Osmotic pressure measurement is preferred over any other colligative property to determine molar mass of proteins and polymers.

$\text{ D. The dimerised form of benzoic acid in benzene is}$ $\mathrm{C_6H_5-\overset{\overset{\displaystyle O}{\|}}{C}-OH\;\cdot\cdot\cdot\cdot\;O=\overset{\overset{\displaystyle OH}{|}}{C}-C_6H_5}$

Choose the correct answer from the options given below :
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JEE Main 2026 · 8 Apr · Shift 2 · Raoult's Law

Given below are two statements :

Given : Molar mass of ${\mathrm{C}},{\mathrm{H}},{\mathrm{O}},{\mathrm{Cl}}$ are $12,1,16$ and $35.5{\ \mathrm{g}}{\ \mathrm{mol}}^{{-1}}$ , respectively

Statement I : In $30\%({\mathrm{w}}/{\mathrm{w}})$ solution of methanol in ${\mathrm{CCl}}_{4}($ at T K $)$ , the mole fraction of ${\mathrm{CCl}}_{4}$ is equal to 0.33 .

Statement II : Mixture of methanol and ${\mathrm{CCl}}_{4}$ shows positive deviation from Raoult's law. In the light of the above statements, choose the correct answer from the options given below :
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JEE Main 2026 · 6 Apr · Shift 1 · Raoult's Law

When 0.25 moles of a non-volatile, non-ionizable solute was dissolved in 1 mole of a solvent the vapor pressure of solution was $x\%$ of vapor pressure of pure solvent. What is $x\%$ ?

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JEE Main 2026 · 6 Apr · Shift 2 · Osmotic Pressure

Given below are two statements :

Statement I : $\;{\mathrm{H}}_{2}{\mathrm{O}}$ molecules move from the chamber 1 to chamber 2 .

Statement II : The osmotic pressure of a solution prepared by dissolving 50 mg of potassium sulphate (molar mass $=174{\ \mathrm{g}}/{\mathrm{mol}}$ ) in 2 L of water (at ${27}^{{\circ}}{\mathrm{C}}$ ) is 0.0107 bar. (Given: ${\mathrm{R}}=0.083{\mathrm{dm}}^{3}$ bar ${\mathrm{K}}^{{-1}}{\ \mathrm{mol}}^{{-1}}$ and assume complete dissociation of electrolyte)

In the light of the above statements, choose the correct answer from the options given below :
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JEE Main 2026 · 5 Apr · Shift 2 · Osmotic Pressure

20 g hemoglobin in a 1 L aqueous solution $({\mathrm{A}})$ at 300 K is separated from pure water by semi permeable membrane. At equilibrium the height of solution in a tube dipped in a solution (A) is found to be 80.0 mm higher than the tube dipped in water.

The molar mass of hemoglobin is $\_\_\_\_$ ${\mathrm{kg}}{\mathrm{mol}}^{{-1}}$ . (Nearest integer)

(Given : ${\mathrm{g}}=10{\ \mathrm{m}}{\ \mathrm{s}}^{{-2}},{\mathrm{R}}=8.3{\mathrm{kPa}}{\mathrm{dm}}{\mathrm{K}}^{{-1}}{\ \mathrm{mol}}^{{-1}}$ , density of solution $=1000{\ \mathrm{kg}}{\ \mathrm{m}}^{{-3}}$ )
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JEE Main 2026 · 4 Apr · Shift 1 · Elevation in Boiling Point

A non-volatile, non-electrolyte solid solute when dissolved in 40 g of a solvent, the vapour pressure of the solvent decreased from 760 mm Hg to 750 mm Hg . If the same solution boils at 320 K , then the number of moles of the solvent present in the solution is $\_\_\_\_$ . (Nearest integer)

[Given: boiling point of the pure solvent $=319.5{\ \mathrm{K}}$ ,

${\mathrm{K}}_{{{\mathrm{b}}}}$ of the solvent $=0.3{\ \mathrm{K}}{\ \mathrm{kg}}{\ \mathrm{mol}}^{{-1}}$ ]
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JEE Main 2026 · 4 Apr · Shift 2 · Osmotic Pressure

At ${27}^{{\circ}}{\mathrm{C}},0.1{\mathrm{M}},1{\ \mathrm{L}}{\ \mathrm{K}}_{4}[{\mathrm{Fe}}({\mathrm{CN}})_{6}]$ aqueous solution and $0.1{\mathrm{M}},1{\ \mathrm{L}}{\mathrm{FeCl}}_{3}$ aqueous solution are placed in a container separated by a semi permeable membrane AB . Assume complete dissociation of both the solutes. Which of the following statement is correct?
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JEE Main 2026 · 2 Apr · Shift 2 · Osmotic Pressure

Solution A is prepared by dissolving 1 g of a protein (molar mass = 50,000 g mol^-1) in 0.5 L of water at 300 K. Its osmotic pressure is $x$ bar. Solution B is made by dissolving 2 g of the same protein in 1 L of water at 300 K. Osmotic pressure of solution B is $y$ bar. Entire solution of A is mixed with entire solution of B at the same temperature. The osmotic pressure of resultant solution is $z$ bar. $x$ , $y$ and $z$ respectively are:
(R = 0.083 L bar mol^-1 K^-1)
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JEE Main 2026 · 2 Apr · Shift 1 · Van't Hoff Factor

19.5 g of fluoro acetic acid (molar mass = 78 g mol⁻¹) is dissolved in 500 g of water at 298 K. The depression in the freezing point of water was 1^∘C. What is $K_{a}$ of fluoro acetic acid?

(For water, $K_{f}=1.86$ K kg mol⁻¹). Assume molarity and molality to have same values.
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JEE Main 2026 · 28 Jan · Shift 2 · Elevation in Boiling Point

Consider 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. 9.0 g Urea in 500 mL of solution.

IV. 20.5 g Aluminium sulphate in 750 mL of solution.

The correct increasing order of boiling point of these solutions will be :

[Given : Molar mass in g mol⁻¹ : H = 1, C = 12, N = 14, O = 16, Cl = 35.5, Ca = 40, Al = 27 and S = 32]
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JEE Main 2026 · 28 Jan · Shift 1 · Raoult's Law

At ${\mathrm{T}}({\mathrm{K}}),2$ 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 of A and one mole of B are added to the solution. The vapour pressure is now measured as 328.6 mm Hg . The vapour pressure (in mm Hg ) of A and B are respectively:

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JEE Main 2026 · 24 Jan · Shift 1 · Van't Hoff Factor

' W ' g of a non-volatile electrolyte solid solute of molar mass ' M ' ${\mathrm{g}}{\mathrm{mol}}^{{-1}}$ when dissolved in 100 mL water, decreases vapour pressure of water from 640 mm Hg to 600 mm Hg . If aqueous solution of the electrolyte boils at 375 K and ${\mathrm{K}}_{{{\mathrm{b}}}}$ for water is $0.52{\ \mathrm{K}}{\ \mathrm{kg}}{\ \mathrm{mol}}^{{-1}}$ , then the mole fraction of the electrolyte solute $(x_{2})$ in the solution can be expressed as

(Given : density of water $=1{\ \mathrm{g}}/{\mathrm{mL}}$ and boiling point of water $=373{\ \mathrm{K}}$ )
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Sample questions from recent papers

JEE Main 2026 · 24 Jan · Shift 2 · Henry's Law

At 298 K , the mole percentage of ${\mathrm{N}}_{2}({\ \mathrm{g}})$ in air is $80\%$ . Water is in equilibrium with air at a pressure of 10 atm . What is the mole fraction of ${\mathrm{N}}_{2}({\ \mathrm{g}})$ in water at 298 K ? $({\mathrm{K}}_{{{\mathrm{H}}}}$ for ${\mathrm{N}}_{2}$ is $\left.6.5\times {10}^{7}{\ \mathrm{mm}}{\mathrm{Hg}}\right)$

(A)
$9.35\times {10}^{{-5}}$
(B)
$9.35\times {10}^{5}$
(C)
$1.23\times {10}^{{-7}}$
(D)
$1.17\times {10}^{{-4}}$

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Answer: (A)

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JEE Main 2025 · 8 Apr · Shift 2 · Depression in Freezing Point

\mathrm{HA}(a q) \rightleftharpoons \mathrm{H}^{+}(a q)+\mathrm{A}^{-}(a q)

The freezing point depression of a 0.1 m aqueous solution of a monobasic weak acid HA is 0.20 °C. The dissociation constant for the acid is

Given: $K_f$ (H₂O) = 1.8 K kg mol⁻¹, molality ≡ molarity

(A)
$1.90 \times 10^{-3}$
(B)
$1.38 \times 10^{-3}$
(C)
$1.1 \times 10^{-2}$
(D)
$1.89 \times 10^{-1}$

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Answer: (B)

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JEE Main 2025 · 7 Apr · Shift 1 · Van't Hoff Factor

The percentage dissociation of a salt $\left(\mathrm{MX}_3\right)$ solution at given temperature (van't Hoff factor $\mathrm{i}=2$ ) is ___________ %(Nearest integer)

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Answer: 33

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JEE Main 2025 · 4 Apr · Shift 2 · Concentration Units

Sea water, which can be considered as a 6 molar $(6 \mathrm{M})$ solution of NaCl , has a density of $2 \mathrm{~g} \mathrm{~mL}^{-1}$ . The concentration of dissolved oxygen $\left(\mathrm{O}_2\right)$ in sea water is 5.8 ppm . Then the concentration of dissolved oxygen $\left(\mathrm{O}_2\right)$ in sea water, is $x \times 10^{-4} \mathrm{~m}$ .

$x=$ ___________. (Nearest integer)

Given: Molar mass of NaCl is $58.5 \mathrm{~g} \mathrm{~mol}^{-1}$

Molar mass of $\mathrm{O}_2$ is $32 \mathrm{~g} \mathrm{~mol}^{-1}$

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Answer: 2

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Frequently asked

How many questions come from Solutions & Colligative Properties in JEE Main?

153 questions from 2020 to 2026, about 22 per year. In 2026 it had 22. The free PDF has 150 of them.

Which Solutions & Colligative Properties topics are most important for JEE Main?

By past papers: Depression in Freezing Point (23%), Raoult's Law (22%) and Elevation in Boiling Point (18%) of all Solutions & Colligative Properties questions.

Is the Solutions & Colligative Properties PYQ PDF free?

Yes. The PDF and its answer key are free, and you can practise the questions online with no login, with step-by-step solutions where available.

Prefer to solve online? Practise Solutions & Colligative Properties online with step-by-step solutions where available, or work through JEE Main papers shift by shift.

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JEE Main PYQs by year: 2026 · 2025 · 2024 · 2023 · 2022 · 2021 · 2020

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Answers follow NTA's final answer keys. Typing errors are possible, so check doubtful answers against the official key. Spotted a mistake? prepwiser.in/feedback · Terms: prepwiser.in/terms

Solutions & Colligative Properties JEE Main PYQs PDF, 2020–2026

How often it's asked in JEE Main

How many questions from Solutions & Colligative Properties in JEE Main, year by year

Most asked Solutions & Colligative Properties topics, 2020–2026

Revise Solutions & Colligative Properties before you practise

Send this chapter to your study group

Solutions & Colligative Properties questions per year

Topic-wise weightage by year

Newest questions (2026)

Sample questions from recent papers

Practise these online, free, no login

Frequently asked

How many questions come from Solutions & Colligative Properties in JEE Main?

Which Solutions & Colligative Properties topics are most important for JEE Main?

Is the Solutions & Colligative Properties PYQ PDF free?

More Chemistry chapters