NEET UG · Chemistry · Solutions

Solutions and Colligative Properties: NEET previous year questions

16 questions in ten years of NEET, in 8 of 10 papers. Pattern: Every year. Here is how it is asked and which ideas come back.

Asked in 10 years: 16; about 1.6 per paper
Years asked: 8/10; last asked 2026
Chance of a question next paper: 84%; historical rate, how we compute it
Weighted estimate: 1.7; model; history: 1.6 a paper on average, typically 0–2

Key findings

01
Asked in 8 of 10 papers, 16 questions in all: #24 of 204 topics by ten-year total. It comes back every 1.3 years on average.
02
57% of its questions since 2018 tested an idea never asked before; 1 repeated an idea from the year before.
03
The most repeated idea is Positive and Negative Deviations, asked 3 times (2020, 2025, 2026), usually as “identify mixture showing deviation”.
04
NEET has asked 0 of the 10 ideas in this topic; 0 have never been asked, directly or indirectly.
05
Mostly asked as one-line MCQ (63%); 56% easy, 0% hard, and up from 1.3 to 2.3 questions a paper since 2024.

Questions per year

Up to 2023: 1.3; per paper
Since 2024: 2.3; +1.0
Usual gap: 1.3 yrs; between papers asking it
Swing: ±0.9; questions, year to year

Recent framings

assertion-reason on ideal solution
count correct statements on solutions
match list on types of solutions

Revise first

Positive and Negative Deviations (2020 2025 2026); Ideal Solutions (2019 2026); Osmotic Pressure (2021 2024)

How it is asked

Difficulty, format and skill

Across all 16 questions on Solutions and Colligative Properties since 2017.

Difficulty

QUESTIONS

Easy9 · 56%
Medium7 · 44%
Hard0 · 0%

Format

One-line MCQ · 10 Q63%
Numerical · 3 Q19%
Assertion–reason · 1 Q6%
Other · 1 Q6%
Match the lists · 1 Q6%

Skill tested

Concept · 6 Q38%
Calculation · 4 Q25%
Recall · 3 Q19%
Application · 2 Q13%
Multi-step · 1 Q6%

Repeats

New idea, or one asked before?

Each column is a paper. Blue questions tested an idea NEET had not asked before; navy ones went back to an idea from an earlier paper. 2017 is the first paper, so everything in it counts as new.

’17’18’19’20’21’22’23’24’25’26

Idea asked for the first time
Idea asked in an earlier paper

Coverage of the topic

NEET has asked 0 of the 10 ideas in this topic. 0 have never been asked yet.

Asked directly0 · 0%
Touched inside another question10 · 100%
Never asked0 · 0%

Ideas come from Lumi’s syllabus map of NCERT. A never-asked idea is not a safe skip: most new questions come from exactly these.

Drill down

Idea, year, question

Every idea NEET tested in this topic, with its ten papers. Open one to read the questions.

ideaAskedShareYears’17’18’19’20’21’22’23’24’25’26

Repeated3 · 19%19%3/10
- 2026 · Q71
  Consider the following statements about the solutions formed by mixing two liquids. A. An ideal solution thus formed obeys Raoult's law…
  mediumOtherAsked the year before
- 2025 · Q81
  5 moles of liquid X and 10 moles of liquid Y make a solution having a vapour pressure of 70 torr. The vapour pressures of pure X and Y are…
  mediumOne-line MCQ
- 2020 · Q115
  The mixture which shows positive deviation from Raoult's law is :
  mediumOne-line MCQNew idea
Repeated2 · 13%13%2/10
Repeated2 · 13%13%2/10
Repeated2 · 13%13%2/10
Repeated2 · 13%13%2/10
1 · 6%6%1/10
1 · 6%6%1/10
1 · 6%6%1/10
1 · 6%6%1/10
1 · 6%6%1/10

Squares are the ten papers, 2017 to 2026; darker means more questions. Share is of the level above.

Ideas

Every idea inside this topic

10 different ideas were tested; 5 came more than once.

Positive and Negative Deviations3×
identify mixture showing deviation
One-line MCQ · 11% next
Ideal Solutions2×
true statement selection on ideal solution
Assertion–reason · 6% next
Osmotic Pressure2×
order/ranking of osmotic pressure
Numerical · 6% next
Concentration Terms2×
definition recall of molality
One-line MCQ · 6% next
Depression of Freezing Point2×
numerical
Numerical · 4% next
Boiling-Point Elevation and van't Hoff Factor1×
identify solution with highest boiling point
One-line MCQ · 6% next
Types of Solutions1×
match list on types of solutions
Match the lists · 6% next
Henry's Law1×
order/ranking of gas solubility
One-line MCQ · 6% next
Raoult's Law and Vapour Pressure1×
numerical
Numerical · 4% next
Azeotropes1×
identify mixture with a given property
One-line MCQ · 4% next

Idea	Times	Format	Chance next	Foundation for
Positive and Negative Deviationsidentify mixture showing deviation	3	One-line MCQCalculation	11%	–
Ideal Solutionstrue statement selection on ideal solution	2	Assertion–reasonConcept	6%	–
Osmotic Pressureorder/ranking of osmotic pressure	2	NumericalCalculation	6%	–
Concentration Termsdefinition recall of molality	2	One-line MCQConcept	6%	–
Depression of Freezing Pointnumerical	2	NumericalCalculation	4%	–
Boiling-Point Elevation and van't Hoff Factoridentify solution with highest boiling point	1	One-line MCQApplication	6%	–
Types of Solutionsmatch list on types of solutions	1	Match the listsRecall	6%	–
Henry's Laworder/ranking of gas solubility	1	One-line MCQApplication	6%	–
Raoult's Law and Vapour Pressurenumerical	1	NumericalCalculation	4%	–
Azeotropesidentify mixture with a given property	1	One-line MCQRecall	4%	–

Chance next is the historical rate at which an idea with this record came back in the following paper. It is low for every idea, which is why learning the topic beats memorising past questions. All repeated ideas

Every question

Solutions and Colligative Properties questions, year by year

The opening words of each question as it appeared in the official paper, with the idea it tested.

NEET 20262 questions

Q54
Assertion A: For an ideal solution formed by mixing liquids P and Q, $\Delta_{mix}H=0$ and $\Delta_{mix}V=0$ Reason R: No interactions…
Idea: Ideal Solutions
MediumAssertion–reason
Q71
Consider the following statements about the solutions formed by mixing two liquids. A. An ideal solution thus formed obeys Raoult's law…
Idea: Positive and Negative Deviations
Asked last yearMediumOther

NEET 20253 questions

Q66
Match List - I with List - II List-I (Example) | List-II (Type of Solution) A. Humidity | I. Solid in solid B. Alloys | II. Liquid in gas…
Idea: Types of Solutions
New ideaEasyMatch the lists
Q79
Which of the following aqueous solution will exhibit highest boiling point?
Idea: Boiling-Point Elevation and van't Hoff Factor
New ideaEasyOne-line MCQ
Q81
5 moles of liquid X and 10 moles of liquid Y make a solution having a vapour pressure of 70 torr. The vapour pressures of pure X and Y are…
Idea: Positive and Negative Deviations
MediumOne-line MCQ

NEET 20242 questions

Q75
The Henry's law constant (K $_H$ ) values of three gases (A, B, C) in water are 145, $2\times10^{-5}$ and 35 kbar, respectively. The…
Idea: Henry's Law
New ideaEasyOne-line MCQ
Q90
The plot of osmotic pressure ( $\Pi$ ) vs concentration (mol L $^{-1}$ ) for a solution gives a straight line with slope 25.73 L bar…
Idea: Osmotic Pressure
MediumNumerical

NEET 20221 question

Q73
In one molal solution that contains 0.5 mole of a solute, there is
Idea: Concentration Terms
EasyOne-line MCQ

NEET 20212 questions

Q85
The following solutions were prepared by dissolving 10 g of glucose ( $\mathrm{C_6H_{12}O_6}$ ) in 250 ml of water ( $P_1$ ), 10 g of urea…
Idea: Osmotic Pressure
New ideaMediumOne-line MCQ
Q91
The correct option for the value of vapour pressure of a solution at 45°C with benzene to octane in molar ratio 3 : 2 is : [At 45°C vapour…
Idea: Raoult's Law and Vapour Pressure
New ideaEasyNumerical

NEET 20202 questions

Q105
The freezing point depression constant ( $K_f$ ) of benzene is 5.12 K kg mol $^{-1}$ . The freezing point depression for the solution of…
Idea: Depression of Freezing Point
EasyNumerical
Q115
The mixture which shows positive deviation from Raoult's law is :
Idea: Positive and Negative Deviations
New ideaMediumOne-line MCQ

NEET 20192 questions

Q66
The mixture that forms maximum boiling azeotrope is :
Idea: Azeotropes
New ideaMediumOne-line MCQ
Q70
For an ideal solution, the correct option is :
Idea: Ideal Solutions
New ideaEasyOne-line MCQ

NEET 20172 questions

Q54
If molality of the dilute solution is doubled, the value of molal depression constant ( $K_f$ ) will be
Idea: Depression of Freezing Point
EasyOne-line MCQ
Q76
Which of the following is dependent on temperature ?
Idea: Concentration Terms
EasyOne-line MCQ

Questions from the official NEET UG papers published by NTA (CBSE before 2019). Topic and idea tags, counts and notes are Lumi’s.