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Class 11 Physics — Chapter 10: Mechanical Properties of Fluids Online Test

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Class 11 Physics: Mechanical Properties of Fluids Online Test (Paper 1)

Welcome to Paper 1! This is your foundation to build confidence and get you ready to tackle the challenges ahead.

  • Total Questions: 20
  • Time Allotted: 30 minutes
  • Passing Score: 40%
  • Randomization: No
  • Certificate: No
  • Retake: Allowed
  • Price: 100% Free

Good luck! 👍

1 / 20

1. A soap bubble of radius is formed. Surface tension is . Calculate excess pressure inside the bubble.

2 / 20

2. A U-tube manometer contains mercury () and is connected to a pipeline carrying water. The difference in mercury levels is . Find gauge pressure in the pipe. (g = 9.8)

3 / 20

3. Which phenomenon demonstrates detergent’s role in reducing surface tension?

4 / 20

4. In bubbles, why is the pressure inside greater than outside?

5 / 20

5. Which of the following phenomena is due to poor wetting?

6 / 20

6. Which instrument is used to measure the angle of contact accurately?

7 / 20

7. A square wire frame of side is dipped into a soap solution and lifted out, forming a soap film. If surface tension is , find the work required to break the film.

8 / 20

8. A liquid rises to height in a capillary of radius . If , find surface tension.

9 / 20

9. The drop weight method of measuring surface tension is based on:

10 / 20

10. A water jet of velocity comes out of a pipe at ground level. Using Bernoulli’s principle, find the maximum height it can reach. ()

11 / 20

11. Kerosene () flows at velocity in a 0.03 m diameter pipe. Calculate Reynolds number.

12 / 20

12. Water () flows at velocity through a pipe of diameter . Calculate Reynolds number.

13 / 20

13. If the Reynolds number for flow in a pipe is 800, the flow is:

14 / 20

14. Water of density and viscosity flows through a pipe of diameter with average velocity . Calculate the Reynolds number and state the flow type.

15 / 20

15. Oil () flows in a tube of diameter at velocity . Calculate Reynolds number.

16 / 20

16. What will happen to the height of the mercury column in a barometer if taken to the top of a mountain?

17 / 20

17. A tank has oil of density up to a height of 5 m. Find the pressure at the bottom due to oil. (Take )

18 / 20

18. A solid block of area rests at the bottom of a tank 10 m deep filled with water. Find the total force acting on the top surface of the block. (Take )

19 / 20

19. In airplane hydraulic systems, Pascal’s principle is used to:

20 / 20

20. A container is filled with water () to a height of 10 m. Find the hydrostatic pressure at the bottom. (Take )

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Class 11 Physics: Mechanical Properties of Fluids Online Test (Paper 2)

Welcome to Paper 2! You’ve mastered the basics, and now it’s time to test your understanding with a more challenging set of questions.

Get new questions on each attempt

  • Total Questions: 30
  • Time Allotted: 45 minutes
  • Passing Score: 50%
  • Randomization: Yes
  • Certificate: No
  • Retake: Allowed
  • Price: 100% Free

Good luck! 👍

1 / 30

1. A car weighing 15,000 N is lifted using a hydraulic lift. The large piston has an area of . What is the minimum pressure required in the system?

2 / 30

2. In applying Bernoulli’s principle to airplane wings, a misconception is that:

3 / 30

3. Why does stretching a soap film require energy?

4 / 30

4. In Reynolds’ experiment, transitional flow occurs in the range of Reynolds number:

5 / 30

5. The height of liquid rise in a capillary is directly proportional to:

6 / 30

6. In fluid mechanics, the constant velocity reached by an air bubble rising in water is also called:

7 / 30

7. If the surface area of a liquid film increases by , the work done is:

8 / 30

8. In capillary action, the rise of liquid is possible only if the angle of contact is:

9 / 30

9. Which assumption of Bernoulli’s theorem is not valid in turbulent flow?

10 / 30

10. In which type of fluids does viscosity remain constant irrespective of applied stress?

11 / 30

11. Which of the following explains why two containers of different shapes but same depth have the same pressure at the bottom?

12 / 30

12. Which of the following is independent of the shape of the container?

13 / 30

13. The excess pressure inside a soap bubble of radius is:

14 / 30

14. Which of the following examples best demonstrates turbulent flow?

15 / 30

15. A container has a liquid of density up to 2.5 m height. Find the pressure at the bottom due to the liquid. (Take )

16 / 30

16. Which factor increases surface tension of a liquid?

17 / 30

17. The SI unit of pressure is:

18 / 30

18. For Reynolds number equal to 2500, the flow regime is:

19 / 30

19. What will happen to the height of the mercury column in a barometer if taken to the top of a mountain?

20 / 30

20. A fluid with density and viscosity flows at velocity through a pipe of diameter . Calculate the Reynolds number.

21 / 30

21. Which limitation is true about Stokes’ law in sedimentation experiments?

22 / 30

22. Liquids transmit pressure equally in all directions because:

23 / 30

23. Which real-life example demonstrates both Pascal’s principle and hydraulic system application?

24 / 30

24. The molecular cause of surface tension is:

25 / 30

25. Two soap bubbles of radii and are joined by a tube. Which bubble will shrink?

26 / 30

26. The instrument used in aircrafts to measure altitude based on atmospheric pressure is:

27 / 30

27. If the diameter of a pipe is halved while keeping velocity and other factors constant, the Reynolds number will:

28 / 30

28. Why are hydraulic brakes preferred in modern vehicles?

29 / 30

29. The radius of a water droplet is . Find excess pressure inside. ()

30 / 30

30. The relationship between surface energy and surface tension is:

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Class 11 Physics: Mechanical Properties of Fluids Online Test (Paper 3)

Welcome to Paper 3! You’ve warmed up—now it's time to step up your game and conquer the challenge with tougher questions!

Earn a certificate upon passing

Get new questions with every attempt

  • Total Questions: 50
  • Time Allotted: 75 minutes
  • Passing Score: 70%
  • Randomization: Yes
  • Certificate: Yes
  • Retake: Allowed
  • Price: 100% Free

Good luck! 👍

1 / 50

1. Stokes’ law is valid only when the Reynolds number is:

2 / 50

2. Which of the following instruments is most suitable for measuring viscosity of highly viscous liquids like tar or bitumen?

3 / 50

3. Stokes’ law is applicable to:

4 / 50

4. In applying Bernoulli’s principle to airplane wings, a misconception is that:

5 / 50

5. A raindrop of radius falls through air (, ). If density of water = , find its terminal velocity.

6 / 50

6. A spherical raindrop of radius falls through air with viscosity . Density of water = , air density negligible. Find terminal velocity. (g = 9.8)

7 / 50

7. Which type of manometer is used for measuring very small pressure differences?

8 / 50

8. Why do larger raindrops fall faster than smaller raindrops?

9 / 50

9. In a siphon, water rises to a height of above reservoir level before falling. What minimum velocity at outlet is required to sustain flow? ()

10 / 50

10. In lubrication systems, flow usually belongs to which regime?

11 / 50

11. The unit of Reynolds number is:

12 / 50

12. A raindrop of radius 1 mm is formed by condensation of small droplets each of radius 0.1 mm. Find number of droplets.

13 / 50

13. In a hydraulic system, the pressure applied on the input piston is . If the output piston has an area of , find the output force.

14 / 50

14. The "Lotus Effect," where water droplets roll off leaves carrying dirt, is due to:

15 / 50

15. A hydraulic lift has a piston of diameter 1.5 m used to lift a car of mass 1200 kg. If the smaller piston has area , calculate the force required on it.

16 / 50

16. The pressure at a depth of 1 m in mercury () is: (Take )

17 / 50

17. Why does water form a concave meniscus in a glass tube?

18 / 50

18. Why do detergents and soaps clean oily clothes effectively?

19 / 50

19. A gas exerts a pressure of . If the force exerted is 500 N, calculate the area of the surface.

20 / 50

20. For Reynolds number equal to 2500, the flow regime is:

21 / 50

21. The variation of pressure with height in a fluid under gravity is expressed as:

22 / 50

22. The relationship used in an Ostwald viscometer for comparing viscosities of two liquids is:

23 / 50

23. A square wire frame of side is dipped into a soap solution and lifted out, forming a soap film. If surface tension is , find the work required to break the film.

24 / 50

24. Fluids are defined as substances that:

25 / 50

25. A water jet of velocity comes out of a pipe at ground level. Using Bernoulli’s principle, find the maximum height it can reach. ()

26 / 50

26. Which of the following is a correct description of detergent action?

27 / 50

27. A spherical pollen grain of radius settles in air with viscosity . If density difference is , calculate the terminal velocity. ()

28 / 50

28. Which statement is correct regarding molecules inside the liquid compared to those at the surface?

29 / 50

29. Why are soap bubbles spherical in shape?

30 / 50

30. A capillary tube of radius is dipped in water (). Assuming , calculate the rise of water in the tube.

31 / 50

31. Which of the following explains why tall buildings use water tanks at the top for water supply?

32 / 50

32. Why does stretching a soap film require energy?

33 / 50

33. Which of the following is a practical application of turbulent flow in aerodynamics?

34 / 50

34. Which of the following correctly matches flow regimes with Reynolds number?

35 / 50

35. Why do detergents work better in hot water?

36 / 50

36. Which statement is TRUE about Newtonian fluids?

37 / 50

37. In Reynolds’ experiment, the flow becomes turbulent when Reynolds number:

38 / 50

38. A liquid of density rises to in a capillary tube of radius . Find the surface tension. ()

39 / 50

39. In a hydraulic brake system, if the master cylinder exerts a pressure of and each brake piston has an area of , what force is exerted on each brake shoe?

40 / 50

40. The height of liquid rise in a capillary is directly proportional to:

41 / 50

41. According to Stokes’ law, the viscous drag force acting on a spherical body of radius moving with velocity in a fluid of viscosity is:

42 / 50

42. If surface tension of water is , find surface energy per unit area.

43 / 50

43. In turbulent flow:

44 / 50

44. A spherical raindrop of radius 2 mm falls with terminal velocity 0.5 m/s. Find viscosity of air. (ρwater = 1000, ρair negligible)

45 / 50

45. The stability of foams (collection of bubbles) depends on:

46 / 50

46. Flow regime in a pipe for is:

47 / 50

47. Why does a raindrop become flattened while falling through the air?

48 / 50

48. Reynolds number is defined as the ratio of:

49 / 50

49. In soap bubbles, detergents help by:

50 / 50

50. Which of the following examples best demonstrates laminar flow?

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Practice Mechanical Properties of Fluids MCQs
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Class 11 Physics — Chapter 10: Mechanical Properties of Fluids Online Test

The Mechanical Properties of Fluids Online Test is a perfect way for Class 11 students to understand how liquids and gases behave under different conditions of pressure and flow. This chapter beautifully connects real-life applications like flying of airplanes, floating of ships, and working of hydraulic brakes with Physics principles. By solving MCQs on Mechanical Properties of Fluids, you will gain a deeper understanding of Pascal’s law, Bernoulli’s theorem, viscosity, surface tension, and buoyancy.

These tests are based on the NCERT Class 11 Physics Chapter 10 and follow the latest CBSE and competitive exam pattern. Each test paper is timed, automatically checked, and shows your results instantly. Whether you are preparing for school exams, JEE, or NEET, this online test helps you evaluate your strengths and improve your weak areas through practice.

The test format is designed to make you feel like you are in a real exam environment. Each question is carefully prepared to test your clarity of formulas and concepts. Students who practice these questions regularly develop better visualization and analytical thinking — especially in numerical topics like fluid pressure, flow rate, and capillary action.

About this Online Test

The Chapter 10 Online Test is divided into three progressive papers. Start with basics, then move to mixed problems, and finally test your complete understanding with challenging questions.

  • Paper 1 — Basic Concepts: 20 questions · 30 min · Pass ≥ 40%
  • Paper 2 — Mixed Practice: 30 questions · 45 min · Pass ≥ 50% · New questions each attempt
  • Paper 3 — Advanced Challenge: 50 questions · 75 min · Pass ≥ 70% · Certificate after pass

Papers 2 and 3 bring fresh sets of questions on each reattempt, while Paper 1 remains fixed for quick revision. All tests include automatic evaluation, instant score display, and complete answer review.

Key Topics Covered (Mechanical Properties of Fluids)

  • Density and pressure of fluids
  • Pascal’s law and hydraulic lift applications
  • Archimedes’ principle and buoyancy
  • Bernoulli’s theorem and its practical uses
  • Equation of continuity and streamlines
  • Viscosity and Stoke’s law
  • Surface tension and capillary rise
  • Reynolds number and flow of liquids

Why You Should Take This Test

Many students find fluid mechanics confusing because they can’t visualize how pressure, force, and flow are related. This online test turns theory into understanding through simple but effective MCQs. It helps you:

  • Revise all major formulas related to fluid mechanics
  • Strengthen concepts of pressure, buoyancy, and viscosity
  • Develop logical thinking for problem-solving
  • Track improvement through instant scoring and retakes
  • Build accuracy and speed for board and competitive exams

Who Should Attempt

  • Class 11 CBSE/NCERT students revising Chapter 10
  • JEE and NEET aspirants preparing for Mechanics-based questions
  • Students who want more practice in numerical and conceptual topics
  • Teachers looking for ready-to-use timed chapter tests

Preparation Tips for Chapter 10 — Mechanical Properties of Fluids

  • Understand pressure-depth relation and Pascal’s law clearly.
  • Practice numerical problems on Bernoulli’s equation and continuity equation.
  • Revise definitions of viscosity, surface tension, and capillary action.
  • Attempt Paper 1 for concepts, Paper 2 for accuracy, and Paper 3 for full-chapter mastery.
  • Reattempt weak areas until you can solve questions confidently within time.

Before You Start

  • Use updated Chrome or Edge browser for smooth access.
  • Keep your internet connection stable during the test.
  • Don’t refresh or close the tab while attempting the paper.

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