NEET UG · Physics · Class 11

Mechanical Properties of Fluids: NEET previous year questions

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

Asked in 10 years: 15; 10 of 10 papers
10-year average: 1.4; a paper · 1.6 since 2024 0.3
Typical range: 1–2; questions a paper; fewest 1, most 2
Weighted estimate: 1.7; model, recent papers count more · about 7 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 Mechanical Properties of Fluids

Priority

Lower priority

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

Past questions: 15in 10 of 10 papers
Study plan gives it: 14 hover 12 months; 11 h over 6

Study this chapter →Practise →

Ideas asked most often

Speed of Efflux2×
Excess Pressure in Bubbles2×

163 of the 174 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

Calculation53%
Figure-based27%
Recall7%
Concept7%
Application7%

Most common asks: numerical (7); dependence of viscous heating rate on radius (1); identify principle behind device (1).

Profile

This chapter in numbers

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

Rank, all NEET chapters: #56; of 80 by weighted estimate
Rank in Physics: #14; of 27 chapters
Share of the paper: 0.8%; ten-year average
Busiest year: 2019; 2 questions
Year to year: Steady; varies by about 0.5 questions
Long-run direction: +0.08; questions per paper, per year
Easy questions: 33%; 94% of ideas rated hard
With a figure: 33%; graph, diagram or structure
Study time: 14 h; 11 h on a 6-month plan
Marks per study hour: 0.50; #67 of 80 chapters
Foundation for others: 67%; of its ideas are used in other chapters

Difficulty, year by year

Each question rated easy, medium or hard against NCERT.

20171
20181
20192
20201
20211
20222
20232
20241
20252
20262

Easy
Medium
Hard

What it asks you to do

SHARE OF QUESTIONS

Calculation33%
Multi-step27%
Application13%
Data or graph13%
Recall7%
Concept7%

Coverage

How much of the chapter NEET has used

We split the chapter into 174 ideas. In ten years NEET built a question around 8 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: 8
Touched on in a question: 3
Never asked: 163

Topics

What repeats, topic by topic

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

Surface Tension · Every year6
111111
Fluid Statics and Dynamics · Every year5
11111
Fluid Viscosity · Most years4
1111

’17’18’19’20’21’22’23’24’25’26

Topic	2017	’18	2019	’20	2021	’22	2023	’24	2025	’26	Total
Surface TensionEvery year	·	·	1	1	·	1	1	1	1	·	6
Fluid Statics and DynamicsEvery year	1	·	1	·	·	·	1	·	1	1	5
Fluid ViscosityMost years	·	1	·	·	1	1	·	·	·	1	4

01+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

Open6 · 40%40%6/10
5 ideas inside
- Repeated2 · 33%33%2/10
- 1 · 17%17%1/10
- 1 · 17%17%1/10
- 1 · 17%17%1/10
- 1 · 17%17%1/10
Open5 · 33%33%5/10
Open4 · 27%27%4/10

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

Speed of Efflux2×
numerical
Excess Pressure in Bubbles2×
effect of expanding soap bubble on pressure
Equation of ContinuityNew1×
numerical
Terminal Velocity Density DependenceNew1×
graph of terminal velocity versus density ratio
Shape of a Liquid SurfaceNew1×
derive differential equation of liquid surface
Lifting Force for a DiscNew1×
numerical

Idea	Times	Usually asked as
Speed of Effluxnumerical	2	Numerical
Excess Pressure in Bubbleseffect of expanding soap bubble on pressure	2	Numerical
Equation of Continuitynumerical	1	NumericalNew
Terminal Velocity Density Dependencegraph of terminal velocity versus density ratio	1	Figure-basedNew
Shape of a Liquid Surfacederive differential equation of liquid surface	1	Figure-basedNew
Lifting Force for a Discnumerical	1	NumericalNew

Every question

Mechanical Properties of Fluids questions, year by year

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

NEET 20262 questions

Q10Water flows in a streamline motion through a horizontal pipe of circular cross-section as shown in the figure. The pressure difference of…Numerical · figure
Q12In the measurement of viscosity of liquids using terminal velocity experiment, spherical balls of same radius but having different…Figure-based · figure

NEET 20252 questions

Q1Consider a water tank shown in the figure. It has one wall at $x = L$ and can be taken to be very wide in the $z$ direction. When filled…Figure-based · figure
Q24A balloon is made of a material of surface tension $S$ and its inflation outlet (from where gas is filled in it) has small area $A$ . It is…One-line MCQ

NEET 20241 question

Q24A thin flat circular disc of radius 4.5 cm is placed gently over the surface of water. If surface tension of water is 0.07 N m $^{-1}$ ,…Numerical

NEET 20232 questions

Q27The amount of energy required to form a soap bubble of radius 2 cm from a soap solution is nearly : (surface tension of soap solution =…Numerical
Q34The venturi-meter works on :One-line MCQ

NEET 20222 questions

Q4If a soap bubble expands, the pressure inside the bubble :One-line MCQ
Q10A spherical ball is dropped in a long column of a highly viscous liquid. The curve in the graph shown, which represents the speed of the…Figure-based · figure

NEET 20211 question

Q20The velocity of a small ball of mass M and density d, when dropped in a container filled with glycerine becomes constant after some time.…One-line MCQ

NEET 20201 question

Q178A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is 5 g.…Numerical

NEET 20192 questions

Q7A soap bubble, having radius of 1 mm, is blown from a detergent solution having a surface tension of $2.5\times10^{-2}$ N/m. The pressure…Numerical
Q38A small hole of area of cross-section 2 mm² is present near the bottom of a fully filled open tank of height 2 m. Taking $g = 10$ m/s²,…Numerical

NEET 20181 question

Q42A small sphere of radius 'r' falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of…One-line MCQ

NEET 20171 question

Q4A U tube with both ends open to the atmosphere, is partially filled with water. Oil, which is immiscible with water, is poured into one…Figure-based · figure

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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