NEET UG · Physics · Class 11

Thermal Properties of Matter: NEET previous year questions

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

Asked in 10 years: 10; 8 of 10 papers
10-year average: 1.0; a paper · 1.0 since 2024 -0.0
Typical range: 0–2; questions a paper; fewest 0, most 2
Weighted estimate: 0.9; model, recent papers count more · about 4 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 Thermal Properties of Matter

Priority

Lower priority

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

Past questions: 10in 8 of 10 papers
Study plan gives it: 7 hover 12 months; 6 h over 6

Study this chapter →Practise →

Ideas asked most often

Conduction through Composite Rods2×
Linear Thermal Expansion2×

90 of the 92 ideas in Lumi’s map of this chapter have not been asked or touched in ten years. New questions often come from ideas like these, so learn the whole chapter, not just the list above.

Questions per year

Kind of question

SHARE OF 10 YEARS

Calculation80%
Recall10%
Figure-based10%

Most common asks: numerical (7); ratio of heat needed for spheres (1); unit of physical quantity (1).

Profile

This chapter in numbers

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

Rank, all NEET chapters: #76; of 80 by weighted estimate
Rank in Physics: #23; of 27 chapters
Share of the paper: 0.6%; ten-year average
Busiest year: 2017; 2 questions
Year to year: Steady; varies by about 0.6 questions
Long-run direction: -0.11; questions per paper, per year
Easy questions: 50%; 53% of ideas rated hard
With a figure: 20%; graph, diagram or structure
Study time: 7 h; 6 h on a 6-month plan
Marks per study hour: 0.54; #46 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
20181
20192
20201
20211
2022
2023
20241
20251
20261

Easy
Medium
Hard

What it asks you to do

SHARE OF QUESTIONS

Calculation50%
Multi-step20%
Application20%
Recall10%

Coverage

How much of the chapter NEET has used

We split the chapter into 92 ideas. In ten years NEET built a question around 2 of them. Most of the chapter has never been asked, which is why learning it whole beats memorising past questions.

Asked as the main idea: 2
Touched on in a question: 0
Never asked: 90

Topics

What repeats, topic by topic

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

Heat Transfer and Thermal Expansion · Every year8
212111
Calorimetry · Gone quiet2
11

’17’18’19’20’21’22’23’24’25’26

Topic	2017	’18	2019	’20	2021	’22	2023	’24	2025	’26	Total
Heat Transfer and Thermal ExpansionEvery year	2	1	2	·	·	·	·	1	1	1	8
CalorimetryGone quiet	·	·	·	1	1	·	·	·	·	·	2

02+questions in that year’s paper

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

Open8 · 80%80%6/1022
6 ideas inside
- Repeated2 · 25%25%2/10
- Repeated2 · 25%25%2/10
- 1 · 13%13%1/10
- 1 · 13%13%1/10
- 1 · 13%13%1/10
- 1 · 13%13%1/10
Open2 · 20%20%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, 8 different ideas were tested. These came more than once, or are new since 2024.

Conduction through Composite Rods2×
effective conductivity of composite rod
Linear Thermal Expansion2×
numerical
Area and Volume ExpansionNew1×
numerical

Idea	Times	Usually asked as
Conduction through Composite Rodseffective conductivity of composite rod	2	Figure-based
Linear Thermal Expansionnumerical	2	Numerical
Area and Volume Expansionnumerical	1	NumericalNew

Every question

Thermal Properties of Matter questions, year by year

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

NEET 20261 question

Q24The temperature of a metallic sphere of radius R is increased by a small amount $\Delta T$ . If the linear coefficient of thermal expansion…Numerical

NEET 20251 question

Q19Three identical heat conducting rods are connected in series as shown in the figure. The rods on the sides have thermal conductivity $2K$ …Numerical · figure

NEET 20241 question

Q42A metallic bar of Young's modulus, $0.5\times10^{11}$ N m $^{-2}$ and coefficient of linear thermal expansion $10^{-5}$ °C $^{-1}$ , length 1…Numerical

NEET 20211 question

Q8A cup of coffee cools from 90°C to 80°C in t minutes, when the room temperature is 20°C. The time taken by a similar cup of coffee to cool…Numerical

NEET 20201 question

Q174The quantities of heat required to raise the temperature of two solid copper spheres of radii $r_1$ and $r_2$ ( $r_1 = 1.5\,r_2$ ) through 1…Numerical

NEET 20192 questions

Q14A copper rod of 88 cm and an aluminium rod of unknown length have their increase in length independent of increase in temperature. The…Numerical
Q20The unit of thermal conductivity is :One-line MCQ

NEET 20181 question

Q43The power radiated by a black body is P and it radiates maximum energy at wavelength, $\lambda_0$ . If the temperature of the black body is…Numerical

NEET 20172 questions

Q11Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are $K_1$ and $K_2$ . The…Figure-based · figure
Q35A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temperature doubled, the…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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