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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. Why are bubbles used in drug delivery systems in medicine?

2 / 30

2. A dam is built to hold water of depth 40 m. What is the hydrostatic pressure at the base of the dam? ()

3 / 30

3. If the angle of contact , the liquid:

4 / 30

4. The condition for reaching terminal velocity depends strongly on:

5 / 30

5. In ink pens, ink rises into the nib due to:

6 / 30

6. Which of the following decreases surface tension of water?

7 / 30

7. Which of the following devices is used to measure the pressure of a gas in a closed container?

8 / 30

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

9 / 30

9. A liquid has viscosity and density . Calculate its kinematic viscosity.

10 / 30

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

11 / 30

11. Reynolds number is defined as the ratio of:

12 / 30

12. In a hydraulic press, a force of 200 N is applied on a piston of area . The area of the larger piston is . What is the output force?

13 / 30

13. For blood flow in a capillary of diameter , velocity = , viscosity = , density = . Calculate Reynolds number.

14 / 30

14. When does a falling particle fail to reach terminal velocity in a fluid?

15 / 30

15. When smoke from incense suddenly starts swirling after some height, it indicates flow has entered:

16 / 30

16. In an Ostwald viscometer, the viscosity of a liquid is determined relative to:

17 / 30

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

18 / 30

18. Why does it become difficult to breathe at high altitudes?

19 / 30

19. Which of the following is NOT an assumption in the derivation of Stokes’ law?

20 / 30

20. Which of the following is true about gases but NOT about liquids?

21 / 30

21. Why does mercury depress in a glass capillary tube?

22 / 30

22. For very small pollen grains in air, terminal velocity is extremely small because:

23 / 30

23. A horizontal pipe carries water with a speed of at pressure . At a constriction, speed rises to . Find pressure at the constriction. ()

24 / 30

24. Which principle does an Ostwald viscometer use for viscosity measurement?

25 / 30

25. A streamline in fluid flow is defined as:

26 / 30

26. In industrial pipelines, turbulence is sometimes intentionally created because:

27 / 30

27. The terminal velocity of a spherical particle in a viscous medium is given by:

28 / 30

28. In a Venturi tube, why does the fluid velocity increase in the throat (narrow part)?

29 / 30

29. Which principle explains why toothpaste can be squeezed out of a closed tube by pressing at any point?

30 / 30

30. The radius of a capillary tube is . Water rises 6 cm in it. Calculate surface tension. ()

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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. In ink pens, ink rises into the nib due to:

2 / 50

2. The slope of surface tension vs. temperature curve is generally:

3 / 50

3. A steel ball of radius falls in oil of viscosity . If density difference is , calculate its terminal velocity.

4 / 50

4. Which factor is responsible for mercury showing a depression in a capillary tube?

5 / 50

5. The Reynolds experiment demonstrates:

6 / 50

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

7 / 50

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

8 / 50

8. The unit of Reynolds number is:

9 / 50

9. Who invented the mercury barometer to measure atmospheric pressure?

10 / 50

10. The Venturi effect refers to:

11 / 50

11. A spherical ball of radius 0.5 cm and density 8000 falls in water (ρ=1000). Terminal velocity = 5 cm/s. Find viscosity of water.

12 / 50

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

13 / 50

13. A U-tube manometer connected to a gas container shows the mercury level on the container side higher by 15 cm compared to the open side. The atmospheric pressure is 76 cm Hg. What is the gas pressure?

14 / 50

14. A ball of radius falls in glycerin (, ). If terminal velocity is found to be , calculate the density of the ball.

15 / 50

15. In pharmaceuticals, surface tension is reduced in liquid medicines to:

16 / 50

16. Blood () flows in an artery of diameter with velocity . Calculate Reynolds number.

17 / 50

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

18 / 50

18. In a Venturi tube, why does the fluid velocity increase in the throat (narrow part)?

19 / 50

19. Why does mercury form a convex meniscus in glass tubes?

20 / 50

20. Which of the following is NOT correct about viscosity?

21 / 50

21. A hydraulic jack has an input piston of radius 5 cm and an output piston of radius 20 cm. If a force of 200 N is applied on the input piston, calculate the output force.

22 / 50

22. Which of the following is NOT a unit of pressure?

23 / 50

23. A tank of height is filled with water. Find the velocity of efflux from a hole above the bottom.

24 / 50

24. In a biomedical application, blood flow in capillaries usually has . This indicates the flow is:

25 / 50

25. Which of the following is an example of zero contact angle?

26 / 50

26. Why does viscosity of liquids decrease with rise in temperature?

27 / 50

27. The equation of motion for a small sphere falling in a viscous fluid before reaching terminal velocity is:

28 / 50

28. Why are soap bubbles more stable than pure liquid bubbles?

29 / 50

29. A pollen grain of radius settles in air. If , calculate terminal velocity.

30 / 50

30. Which factor determines the curvature of a liquid drop?

31 / 50

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

32 / 50

32. Superhydrophobic surfaces, such as lotus leaves, have contact angles:

33 / 50

33. In bubble dynamics, the collapse of bubbles in a liquid (cavitation) can be harmful because:

34 / 50

34. A small sphere of radius falls in a liquid of viscosity . If terminal velocity is and density of liquid = , calculate density of the sphere.

35 / 50

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

36 / 50

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

37 / 50

37. A horizontal pipe carries water with a speed of at pressure . At a constriction, speed rises to . Find pressure at the constriction. ()

38 / 50

38. A spherical soap bubble of radius requires work of to be formed. Find surface tension.

39 / 50

39. Which of the following is a correct assumption of Bernoulli’s principle?

40 / 50

40. Water flows through a horizontal pipe of cross-sectional areas and . The pressure difference between these sections is . Find the flow rate of water. ()

41 / 50

41. In a hydraulic system, the input piston area is and the output piston area is . If an input force of 100 N is applied, calculate the output force.

42 / 50

42. A capillary of radius shows a rise of in water at . Calculate surface tension.

43 / 50

43. The pressure difference between two points in a fluid at depths and is:

44 / 50

44. In ink pens, capillary action works effectively when:

45 / 50

45. The working of a perfume spray is based on:

46 / 50

46. Which of the following phenomena is influenced by reduction of surface tension at high temperature?

47 / 50

47. When smoke from incense suddenly starts swirling after some height, it indicates flow has entered:

48 / 50

48. Which factor is responsible for collapse of small bubbles faster than large ones?

49 / 50

49. A car weighing is lifted using a hydraulic lift. The large piston has an area of . What minimum force is required on the small piston of area ?

50 / 50

50. In particle size analysis, smaller particles settle more slowly because:

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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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