NEET UG · Chemistry · Class 12

Solutions: NEET previous year questions

16 questions in ten years of NEET, asked in 8 of 10 years. Here is what this chapter tests and how.

Asked in 10 years: 16; 8 of 10 papers
10-year average: 1.6; a paper · 2.3 since 2024 +1.0
Typical range: 0–2; questions a paper; fewest 0, most 3
Weighted estimate: 1.9; model, recent papers count more · about 8 marks

Typical range (fact)
10-year average (fact)
Weighted estimate (model)

Typical range: questions per paper in the middle eight of the ten papers, leaving out the single highest and lowest year (about the 10th to 90th percentile), each paper scaled to 180 questions. The ten-year average and the range are historical fact. The weighted estimate is a model: each paper's share, with recent papers counting more (half-life three years), and dropped syllabus removed. It is a guide to effort, not a forecast.

What to do

How to spend time on Solutions

Priority

Should do

Among the chapters that took NEET from half to 80% of its questions. How bands are set

Past questions: 16in 8 of 10 papers
Study plan gives it: 13 hover 12 months; 10 h over 6

Study this chapter →Practise →

Ideas asked most often

Positive and Negative Deviations3×
Ideal Solutions2×
Osmotic Pressure2×
Concentration Terms2×
Depression of Freezing Point2×

Questions per year

Kind of question

SHARE OF 10 YEARS

Calculation31%
Concept31%
Recall13%
Application13%
Match the lists6%
Assertion–reason6%

Most common asks: numerical (3); identify mixture showing deviation (1); definition recall of molality (1).

Profile

This chapter in numbers

Where it ranks, how steady it is, and what it costs to study.

Rank, all NEET chapters: #46; of 80 by weighted estimate
Rank in Chemistry: #12; of 21 chapters
Share of the paper: 0.9%; ten-year average
Busiest year: 2025; 3 questions
Year to year: Some swing; varies by about 0.9 questions
Long-run direction: +0.08; questions per paper, per year
Easy questions: 56%; 39% of ideas rated hard
With a figure: 0%; graph, diagram or structure
Study time: 13 h; 10 h on a 6-month plan
Marks per study hour: 0.62; #24 of 80 chapters
Foundation for others: 50%; of its ideas are used in other chapters

Difficulty, year by year

Each question rated easy, medium or hard against NCERT.

20172
2018
20192
20202
20212
20221
2023
20242
20253
20262

Easy
Medium
Hard

What it asks you to do

SHARE OF QUESTIONS

Concept38%
Calculation25%
Recall19%
Application13%
Multi-step6%

Topics

What repeats, topic by topic

Questions per topic in each year's paper. Topics that come every year are worth learning first.

Solutions and Colligative Properties · Every year16
22221232

’17’18’19’20’21’22’23’24’25’26

Topic	2017	’18	2019	’20	2021	’22	2023	’24	2025	’26	Total
Solutions and Colligative PropertiesEvery year	2	·	2	2	2	1	·	2	3	2	16

03+questions in that year’s paper

Solutions and Colligative Properties
Expect a short numerical problem (one or two formula steps, four numeric options) about Solutions and Colligative Properties; a conceptual single-answer item (reasoning rather than recall) is the next most likely shape. Past framings centre on: numerical; identify mixture showing deviation.

Drill down

Topic, idea, question

Open a topic to see every idea NEET tested inside it, then open an idea to read the questions. Each row shows its ten papers.

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

Open16 · 100%100%8/102222232
10 ideas inside
- Repeated3 · 19%19%3/10
- 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

The exact ideas NEET has asked

Inside the topics, 10 different ideas were tested. These came more than once, or are new since 2024.

Positive and Negative Deviations3×
identify mixture showing deviation
Ideal Solutions2×
true statement selection on ideal solution
Osmotic Pressure2×
order/ranking of osmotic pressure
Concentration Terms2×
definition recall of molality
Depression of Freezing Point2×
numerical
Boiling-Point Elevation and van't Hoff FactorNew1×
identify solution with highest boiling point
Types of SolutionsNew1×
match list on types of solutions
Henry's LawNew1×
order/ranking of gas solubility

Idea	Times	Usually asked as
Positive and Negative Deviationsidentify mixture showing deviation	3	One-line MCQ
Ideal Solutionstrue statement selection on ideal solution	2	Assertion–reason
Osmotic Pressureorder/ranking of osmotic pressure	2	Numerical
Concentration Termsdefinition recall of molality	2	One-line MCQ
Depression of Freezing Pointnumerical	2	Numerical
Boiling-Point Elevation and van't Hoff Factoridentify solution with highest boiling point	1	One-line MCQNew
Types of Solutionsmatch list on types of solutions	1	Match the listsNew
Henry's Laworder/ranking of gas solubility	1	One-line MCQNew

Every question

Solutions questions, year by year

The opening words of each question as it appeared in the official paper.

NEET 20262 questions

Q54Assertion 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…Assertion–reason
Q71Consider the following statements about the solutions formed by mixing two liquids. A. An ideal solution thus formed obeys Raoult's law…Other

NEET 20253 questions

Q66Match 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…Match the lists
Q79Which of the following aqueous solution will exhibit highest boiling point?One-line MCQ
Q815 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…One-line MCQ

NEET 20242 questions

Q75The 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…One-line MCQ
Q90The plot of osmotic pressure ( $\Pi$ ) vs concentration (mol L $^{-1}$ ) for a solution gives a straight line with slope 25.73 L bar…Numerical

NEET 20221 question

Q73In one molal solution that contains 0.5 mole of a solute, there isOne-line MCQ

NEET 20212 questions

Q85The 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…One-line MCQ
Q91The 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…Numerical

NEET 20202 questions

Q105The freezing point depression constant ( $K_f$ ) of benzene is 5.12 K kg mol $^{-1}$ . The freezing point depression for the solution of…Numerical
Q115The mixture which shows positive deviation from Raoult's law is :One-line MCQ

NEET 20192 questions

Q66The mixture that forms maximum boiling azeotrope is :One-line MCQ
Q70For an ideal solution, the correct option is :One-line MCQ

NEET 20172 questions

Q54If molality of the dilute solution is doubled, the value of molal depression constant ( $K_f$ ) will beOne-line MCQ
Q76Which of the following is dependent on temperature ?One-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.

More from Physical Chemistry

All NEET chapters NEET Chemistry analysis Study plan