NEET UG · Physics · Class 11

Kinetic Theory: NEET previous year questions

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

Asked in 10 years: 14; 10 of 10 papers
10-year average: 1.4; a paper · 1.6 since 2024 +0.4
Typical range: 1–2; questions a paper; fewest 1, most 3
Weighted estimate: 1.5; model, recent papers count more · about 6 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 Kinetic Theory

Priority

Lower priority

Among the chapters that shared the last fifth of the questions. How bands are set

Past questions: 14in 10 of 10 papers
Study plan gives it: 12 hover 12 months; 9 h over 6

Study this chapter →Practise →

Ideas asked most often

Ideal Gas Equation5×
Degrees of Freedom and Internal Energy3×
Mean Free Path2×
RMS Speed of Molecules2×
Molecular Kinetic Energy and Temperature2×

Questions per year

Kind of question

SHARE OF 10 YEARS

Calculation64%
Recall14%
Concept7%
Match the lists7%
Figure-based7%

Most common asks: numerical (9); recall formula for mean free path (1); recall average energy per molecule of gas (1).

Profile

This chapter in numbers

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

Rank, all NEET chapters: #64; of 80 by weighted estimate
Rank in Physics: #18; of 27 chapters
Share of the paper: 0.8%; ten-year average
Busiest year: 2020; 3 questions
Year to year: Steady; varies by about 0.7 questions
Long-run direction: +0.06; questions per paper, per year
Easy questions: 36%; 79% of ideas rated hard
With a figure: 7%; graph, diagram or structure
Study time: 12 h; 9 h on a 6-month plan
Marks per study hour: 0.49; #73 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.

20171
20181
20191
20203
20211
20221
20231
20241
20252
20262

Easy
Medium
Hard

What it asks you to do

SHARE OF QUESTIONS

Calculation36%
Multi-step29%
Recall21%
Concept7%
Data or graph7%

Topics

What repeats, topic by topic

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

Kinetic Theory of Gases · Every year14
1113111122

’17’18’19’20’21’22’23’24’25’26

Topic	2017	’18	2019	’20	2021	’22	2023	’24	2025	’26	Total
Kinetic Theory of GasesEvery year	1	1	1	3	1	1	1	1	2	2	14

03+questions in that year’s paper

Kinetic Theory of Gases
Expect a short numerical problem (one or two formula steps, four numeric options) about Kinetic Theory of Gases. Past framings centre on: numerical; recall formula for mean free path.

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

Open14 · 100%100%10/10322
5 ideas inside
- Repeated5 · 36%36%4/102
- Repeated3 · 21%21%3/10
- Repeated2 · 14%14%2/10
- Repeated2 · 14%14%2/10
- Repeated2 · 14%14%2/10

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, 5 different ideas were tested. These came more than once, or are new since 2024.

Ideal Gas Equation5×
numerical
Degrees of Freedom and Internal Energy3×
numerical
Mean Free Path2×
recall formula for mean free path
RMS Speed of Molecules2×
numerical
Molecular Kinetic Energy and Temperature2×
recall average energy per molecule of gas

Idea	Times	Usually asked as
Ideal Gas Equationnumerical	5	Numerical
Degrees of Freedom and Internal Energynumerical	3	Numerical
Mean Free Pathrecall formula for mean free path	2	Numerical
RMS Speed of Moleculesnumerical	2	Numerical
Molecular Kinetic Energy and Temperaturerecall average energy per molecule of gas	2	One-line MCQ

Every question

Kinetic Theory questions, year by year

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

NEET 20262 questions

Q2The mean free path of molecules in an ideal gas A is half that of another ideal gas B. The diameter of the spherical molecules of gas A is…Numerical
Q45An ideal gas is made of polyatomic molecules. Each of the molecules has three translational, three rotational and f number of vibrational…Numerical

NEET 20252 questions

Q14An oxygen cylinder of volume 30 litre has 18.20 moles of oxygen. After some oxygen is withdrawn from the cylinder, its gauge pressure…Numerical
Q29A container has two chambers of volumes $V_1$ = 2 litres and $V_2$ = 3 litres separated by a partition made of a thermal insulator. The…Numerical

NEET 20241 question

Q47The following graph represents the T-V curves of an ideal gas (where T is the temperature and V the volume) at three pressures $P_1$ ,…Figure-based · figure

NEET 20231 question

Q12The temperature of a gas is −50° C. To what temperature the gas should be heated so that the rms speed is increased by 3 times?Numerical

NEET 20221 question

Q44The volume occupied by the molecules contained in 4.5 kg water at STP, if the intermolecular forces vanish away is :Numerical

NEET 20211 question

Q27Match Column - I and Column - II and choose the correct match from the given choices. Column - I | Column - II (A) Root mean square speed…Match the lists

NEET 20203 questions

Q139A cylinder contains hydrogen gas at pressure of 249 kPa and temperature 27°C. Its density is : (R = 8.3 J mol $^{-1}$ K $^{-1}$ )Numerical
Q155The mean free path for a gas, with molecular diameter d and number density n can be expressed as :One-line MCQ
Q162The average thermal energy for a mono-atomic gas is : ( $k_B$ is Boltzmann constant and T, absolute temperature)One-line MCQ

NEET 20191 question

Q12Increase in temperature of a gas filled in a container would lead to :One-line MCQ

NEET 20181 question

Q3At what temperature will the rms speed of oxygen molecules become just sufficient for escaping from the Earth's atmosphere ? (Given : Mass…Numerical

NEET 20171 question

Q2A gas mixture consists of 2 moles of $\mathrm{O_2}$ and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the total…Numerical

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

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