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Physics - Mechanical Properties of Fluids

Practise 192 JEE Main previous year questions on Mechanical Properties of Fluids, compiled from papers spanning 2002 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty JEE Main tests.

Mechanical Properties of Fluids has been asked in 22 of the 25 years of JEE Main papers analysed (2002–2026), with 192 questions in all. 25% of them were easy, 53% moderate and 22% tough. Most of its questions came from 2024, with 25 questions that year. In the last three years (2024–2026) it had 58 questions across 49 papers, about 1.2 per paper.

The chapter's 7 topics are not weighted equally: Surface tension (72 questions, 38%), Viscosity (38 questions, 20%), and Hydrodynamics (32 questions, 17%) have been asked the most. Surface tension has also led over the last five years, with 41 questions. Surface tension has produced the most tough questions (18).

  1. 1A liquid of density kg/m flowing steadily in a tube of varying cross-section. The cross-section at a point is cm and that at is mm . Both th08 Apr, 2026 (E)Hydrodynamics
  2. 2A spherical liquid drop of radius acquires the terminal velocity when falls through a gas of viscosity . Now the drop is broken into identic08 Apr, 2026 (E)Viscosity
  3. 3A cylindrical vessel of cm radius is completely filled with water and its capacity is dm (dm : decimeter). The vessel is placed on a solid b06 Apr, 2026 (E)Efflux of liquid
  4. 4Eight mercury drops, each of radius , coalesce to form a bigger drop. The surface energy released in this process is _______. ( is the surfa05 Apr, 2026 (E)Surface tension
  5. 5The surface tension of a soap solution is N/m. The work required to increase the radius of a soap bubble from cm to cm is J. The value of is04 Apr, 2026 (M)Surface tension
  6. 6A water spray gun is attached to a hose of cross sectional area cm . The gun comprises of perforations each of cross sectional area mm . If 04 Apr, 2026 (E)Hydrodynamics
  7. 7A liquid drop of diameter mm breaks into droplets. The change in surface energy is J. The value of is _______. (Take surface tension of liqu02 Apr, 2026 (M)Surface tension
  8. 8A tub is filled with water and a wooden cube cm cm cm is placed in the water. The wooden cube is found to float on the water with a part of 02 Apr, 2026 (M)Archmidies Principle
  9. 9The surface tension of a soap bubble is N/m. The work done in increasing the diameter of bubble from cm to cm is J. The value of is _______.02 Apr, 2026 (E)Surface tension
  10. 10If an air bubble of diameter mm rises steadily through a liquid of density kg/m at a rate of cm/s, then the coefficient of viscosity of liqu02 Apr, 2026 (E)Viscosity
  11. 11Sixty four rain drops of radius 1 mm each falling down with a terminal velocity of coalesce to form a bigger drop. The terminal velocity of 24 Jan, 2026 (M)Viscosity
  12. 12A cubical block of density floats in a liquid of density . If the height of block is then height of the submerged part is cm.24 Jan, 2026 (E)Archmidies Principle
  13. 13A soap bubble of surface tension is blown to a diameter of 7 cm. If of work is done in blowing it further to make its diameter 14 cm, then t24 Jan, 2026 (E)Surface tension
  14. 14A small metallic sphere of diameter 2 mm and density is dropped in glycerine having viscosity 10 Poise and density respectively. The termina23 Jan, 2026 (E)Viscosity
  15. 15An air bubble of volume rises from the bottom of a swimming pool of 5 m deep. At the bottom of the pool water temperature is . The volume of23 Jan, 2026 (E)Pressure and thrust
  16. 16Given below are two statements: Statement I : Pressure of a fluid is exerted only on a solid surface in contact as the fluid-pressure does n22 Jan, 2026 (M)Surface tension
  17. 17When a part of a straight capillary tube is placed vertically in a liquid, the liquid raises upto certain height . If the inner radius of th22 Jan, 2026 (E)Surface tension
  18. 18Water flows through a horizontal tube as shown in the figure. The difference in height between the water columns in vertical tubes is 5 cm a21 Jan, 2026 (M)Hydrodynamics
  19. 19A spherical body of radius and density falls freely through a viscous liquid having density and viscosity and attains a terminal velocity . 21 Jan, 2026 (E)Viscosity
  20. 20Surface tension of two liquids (having same densities), and , are measured using capillary rise method utilizing two tubes with inner radii 21 Jan, 2026 (E)Surface tension
  21. 21The terminal velocity of a metallic ball of radius 6 mm in a viscous fluid is . The terminal velocity of another ball of same material and h21 Jan, 2026 (E)Viscosity
  22. 22A capillary tube of radius 0.1 mm is partly dipped in water (surface tension and glass water contact angle ) with inclined with vertical. Th07 Apr, 2025 (E)Surface tension
  23. 23Two liquids A and B have and as contact angles in a capillary tube. If . then identify the correct statement:04 Apr, 2025 (M)Surface tension
  24. 24Consider a completely full cylindrical water tank of height 1.6 m and cross-sectional area . It has a small hole in its side at a height 90 03 Apr, 2025 (M)Hydrodynamics
  25. 25Two cylindrical vessels of equal cross sectional area of contain water up to height 10 m and 6 m , respectively. If the vessels are connecte03 Apr, 2025 (E)Pascal's Law
  26. 26The excess pressure inside a soap bubble A in air is half the excess pressure inside another soap bubble B in air. If the volume of the bubb03 Apr, 2025 (E)Surface tension
  27. 27A solid steel ball of diameter 3.6 mm acquired terminal velocity while falling under gravity through an oil of density . Take density of ste03 Apr, 2025 (E)Viscosity
  28. 28A vessel with square cross-section and height of 6 m is vertically partitioned. A small window of with hinged door is fitted at a depth of 302 Apr, 2025 (M)Archmidies Principle
  29. 29Two water drops each of radius 'r' coalesce to from a bigger drop. If ' T ' is the surface tension, the surface energy released in this proc02 Apr, 2025 (E)Surface tension
  30. 30In a hydraulic lift, the surface area of the input piston is \(6 {~cm}^2\) and that of the output piston is \(1500 {~cm}^2\). If 100 N force29 Jan, 2025 (M)Pascal's Law
  31. 31In the experiment for measurement of viscosity ' ' of given liquid with a ball having radius , consider following statements. A. Graph betwe28 Jan, 2025 (M)Viscosity
  32. 32Consider following statements: A. Surface tension arises due to extra energy of the molecules at the interior as compared to the molecules a28 Jan, 2025 (M)Viscosity
  33. 33A 400 g solid cube having an edge of length 10 cm floats in water. How much volume of the cube is outside the water ? (Given : density of wa28 Jan, 2025 (E)Archmidies Principle
  34. 34A thin transparent film with refractive index 1.4 , is held on circular ring of radius 1.8 cm . The fluid in the film evaporates such that t28 Jan, 2025 (E)Surface tension
  35. 35The amount of work done to break a big water drop of radius ' ' into 27 small drops of equal radius is 10 J . The work done required to brea24 Jan, 2025 (M)Surface tension
  36. 36An air bubble of radius 0.1 cm lies at a depth of 20 cm below the free surface of a liquid of density . If the pressure inside the bubble is24 Jan, 2025 (M)Surface tension
  37. 37Given below are two statements: Statement I: The hot water flows faster than cold water Statement II: Soap water has higher surface tension 23 Jan, 2025 (M)Viscosity
  38. 38Water flows in a horizontal pipe whose one end is closed with a valve. The reading of the pressure gauge attached to the pipe is . The readi23 Jan, 2025 (E)Hydrodynamics
  39. 39An air bubble of radius 1.0 mm is observed at a depth of 20 cm below the free surface of a liquid having surface tension and density . The d23 Jan, 2025 (E)Surface tension
  40. 40Two soap bubbles of radius 2 cm and 4 cm , respectively, are in contact with each other. The radius of curvature of the common surface, in c22 Jan, 2025 (M)Surface tension
  41. 41A small rigid spherical ball of mass M is dropped in a long vertical tube containing glycerine. The velocity of the ball becomes constant af22 Jan, 2025 (E)Viscosity
  42. 42A tube of length is shown in the figure. The radius of cross section at the point (1) is 2 cm and at the point (2) is 1 cm , respectively. I22 Jan, 2025 (E)Hydrodynamics
  43. 43A tube of length 1 m is filled completely with an ideal liquid of mass 2 M , and closed at both ends. The tube is rotated uniformly in horiz22 Jan, 2025 (E)Pascal's Law
  44. 44A sphere of relative density and diameter has concentric cavity of diameter . The ratio of , if it just floats on water in a tank is :09 Apr, 2024 (M)Archmidies Principle
  45. 45The excess pressure inside a soap bubble is thrice the excess pressure inside a second soap bubble. The ratio between the volume of the firs09 Apr, 2024 (E)Surface tension
  46. 46A spherical ball of radius and density falls freely under gravity through a distance before entering a tank of water, If after entering in w09 Apr, 2024 (E)Viscosity
  47. 47Correct Bernoulli's equation is (symbols have their usual meaning) :08 Apr, 2024 (M)Hydrodynamics
  48. 48A liquid column of height balances excess pressure of a soap bubble of certain radius. If density of liquid is and surface tension of soap s08 Apr, 2024 (M)Surface tension
  49. 49A cube of ice floats partly in water and partly in kerosene oil. The ratio of volume of ice immersed in water to that in kerosene oil (speci08 Apr, 2024 (E)Archmidies Principle
  50. 50Small water droplets of radius are formed in the upper atmosphere and falling with a terminal velocity of . Due to condensation, if 8 such d08 Apr, 2024 (E)Viscosity

Frequently Asked Questions

1.How many questions are available for Mechanical Properties of Fluids?

This chapter includes 192 questions compiled from JEE Main papers spanning 2002 to 2026.

2.Are these questions only from JEE Main, or from other exams too?

These are JEE Main questions specifically for the Mechanical Properties of Fluids chapter. Questions from other exams like NTA Abhyas (JEE Main) or JEE Advanced are organised separately under their respective exam sections.

3.Is Mechanical Properties of Fluids an important chapter for JEE Main Physics?

Mechanical Properties of Fluids has appeared in 22 of the 25 years of JEE Main papers covered here, with 192 questions across 144 papers - about one per paper it appears in.

4.What is the difficulty level of Mechanical Properties of Fluids questions in JEE Main?

Of the 192 questions analysed for this chapter, 25% are easy, 53% moderate and 22% tough. 2024 had the most, with 25 questions.

5.Which topics in Mechanical Properties of Fluids should I focus on?

These topics have carried the most weightage in Mechanical Properties of Fluids:

  • Surface tension - 72 questions (38%)
  • Viscosity - 38 questions (20%)
  • Hydrodynamics - 32 questions (17%)
  • Surface tension has produced the most tough questions (18).
6.Is Mechanical Properties of Fluids's weightage in JEE Main going up or down?

Across all 144 papers analysed, Mechanical Properties of Fluids has averaged about 1.3 questions per paper. In the last three years (2024–2026), that average has stayed about the same, at about 1.2 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.