NEET UG · Physics · Mechanical Properties of Fluids
Fluid Viscosity: NEET previous year questions
4 questions in ten years of NEET, in 4 of 10 papers. Pattern: Most years. Here is how it is asked and which ideas come back.
- Asked in 10 years
- 4
- about 0.4 per paper
- Years asked
- 4/10
- last asked 2026
- Weighted estimate
- 0.4
- model; history: 0.4 a paper on average, typically 0–1
Key findings
- 01
Asked in 4 of 10 papers, 4 questions in all: #165 of 204 topics by ten-year total. It comes back every 2.7 years on average.
- 02
100% of its questions since 2018 tested an idea never asked before; none repeated an idea from the year before.
- 03
No idea in this topic has been asked twice: every question tested something new.
- 04
NEET has asked 4 of the 85 ideas in this topic; 79 have never been asked, directly or indirectly.
- 05
Mostly asked as figure-based (50%); 25% easy, 0% hard.
Questions per year
- Up to 2023
- 0.4
- per paper
- Since 2024
- 0.3
- -0.1
- Usual gap
- 2.7 yrs
- between papers asking it
- Swing
- ±0.5
- questions, year to year
How it is asked
Difficulty, format and skill
Across all 4 questions on Fluid Viscosity since 2017.
Difficulty
QUESTIONS- Easy1 · 25%
- Medium3 · 75%
- Hard0 · 0%
Format
SHARE- Figure-based · 2 Q50%
- One-line MCQ · 2 Q50%
Skill tested
SHARE- Data or graph · 2 Q50%
- Application · 1 Q25%
- Multi-step · 1 Q25%
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.
- Idea asked for the first time
- Idea asked in an earlier paper
Coverage of the topic
NEET has asked 4 of the 85 ideas in this topic. 79 have never been asked yet.
- Asked directly4 · 5%
- Touched inside another question2 · 2%
- Never asked79 · 93%
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.
- 1 · 25%
- 2018 · 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…
mediumOne-line MCQNew idea
- 2018 · Q42
- 1 · 25%
- 1 · 25%
- 1 · 25%
Squares are the ten papers, 2017 to 2026; darker means more questions. Share is of the level above.
Ideas
Every idea inside this topic
4 different ideas were tested; none came more than once. Terminal Velocity Calculation is the foundation for 26 other ideas in the syllabus.
- Terminal Velocity Density Dependence1×
graph of terminal velocity versus density ratio
Figure-based · 6% next · foundation for 3 - Velocity-Time Graph for Falling Body1×
graph interpretation of speed vs time
Figure-based · 4% next · foundation for 3 - Terminal Velocity Calculation1×
viscous force at terminal velocity with buoyancy
One-line MCQ · 4% next · foundation for 26 - Power Dissipation by Viscous Drag1×
dependence of viscous heating rate on radius
One-line MCQ · 4% next
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
Fluid Viscosity questions, year by year
The opening words of each question as it appeared in the official paper, with the idea it tested.
NEET 20261 question
- Q12In the measurement of viscosity of liquids using terminal velocity experiment, spherical balls of same radius but having different…
Idea: Terminal Velocity Density Dependence
New ideaMediumFigure-based · figure
NEET 20221 question
- 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…
Idea: Velocity-Time Graph for Falling Body
New ideaEasyFigure-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.…
Idea: Terminal Velocity Calculation
New ideaMediumOne-line MCQ
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…
Idea: Power Dissipation by Viscous Drag
New ideaMediumOne-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.