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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 is fluid mechanics essential in chemical engineering?

2 / 30

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

3 / 30

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

4 / 30

4. A spherical drop of radius is divided into smaller drops of equal size. If the initial surface energy was , what is the final surface energy?

5 / 30

5. For a liquid-solid interface, the relation between surface tensions and contact angle is given by:

6 / 30

6. Why do ships made of steel float on water despite being denser than water?

7 / 30

7. For water at 20°C, surface tension is about . At 100°C, it is about . This shows that:

8 / 30

8. At terminal velocity, the acceleration of the falling body is:

9 / 30

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

10 / 30

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

11 / 30

11. In a Venturi meter, Bernoulli’s principle is applied to measure:

12 / 30

12. A cubic film frame of side is dipped in soap solution. Calculate the surface energy if surface tension is .

13 / 30

13. For water in a clean glass tube, the meniscus is concave because:

14 / 30

14. The instrument commonly used to measure viscosity of liquids in laboratories is:

15 / 30

15. The smoke rising straight from an incense stick is an example of which regime?

16 / 30

16. Water is flowing through a pipe of diameter with speed . The pipe narrows to . Find pressure difference between the two sections. ()

17 / 30

17. A hydraulic lift is used to raise a car of mass 1500 kg. If the area of the large piston is , find the pressure needed in the system. (Take )

18 / 30

18. If the angle of contact , the liquid:

19 / 30

19. Stokes’ law is applied in sedimentation to:

20 / 30

20. The energy required to form a bubble of radius and surface tension is:

21 / 30

21. Bernoulli’s equation relates to which type of flow?

22 / 30

22. 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?

23 / 30

23. Which of the following conditions favors transition to turbulence?

24 / 30

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

25 / 30

25. A tank is filled with water up to 5 m. Calculate the pressure at the bottom. ()

26 / 30

26. The SI unit of pressure is:

27 / 30

27. In Reynolds’ experiment, the flow is laminar when the dye filament:

28 / 30

28. Which factor determines the surface energy of a liquid?

29 / 30

29. Why does kerosene spread easily on water?

30 / 30

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

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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. Surface tension is defined as:

2 / 50

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

3 / 50

3. What happens to the surface tension of a liquid when its temperature increases?

4 / 50

4. Which factor determines the surface energy of a liquid?

5 / 50

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

6 / 50

6. The hydrophilic part of a detergent molecule is:

7 / 50

7. 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.

8 / 50

8. The relation between surface tension (T) and surface energy (E) is:

9 / 50

9. A cylindrical vessel is filled with oil () up to a height of 5 m. Find the pressure at the bottom due to oil. ()

10 / 50

10. In ultrasound imaging, stability of bubbles is improved by:

11 / 50

11. Which equation describes the behavior of gases but not liquids?

12 / 50

12. Effect of pressure on viscosity of liquids is generally:

13 / 50

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

14 / 50

14. A lead shot of radius falls through oil of viscosity . If density of lead = and oil = , calculate terminal velocity. ()

15 / 50

15. The hydrostatic pressure at 10 m depth in mercury is: ()

16 / 50

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

17 / 50

17. A liquid has surface tension . If the surface area increases by , calculate the work done.

18 / 50

18. Which of the following is NOT a hydraulic system application?

19 / 50

19. Which factor increases surface tension of a liquid?

20 / 50

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

21 / 50

21. Which application of surface tension and capillarity is used in wicks of lamps?

22 / 50

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

23 / 50

23. For a smooth glass tube, flow is laminar up to Reynolds number:

24 / 50

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

25 / 50

25. For maximum capillary rise, the contact angle should be:

26 / 50

26. Which part of a detergent molecule lowers water’s surface tension?

27 / 50

27. Why is surface chemistry important in corrosion studies?

28 / 50

28. Stokes’ law is not applicable when:

29 / 50

29. Which of the following methods is commonly used to measure surface tension of a liquid?

30 / 50

30. A ball of radius falls through a fluid and attains terminal velocity of . If the viscosity of the fluid is and density of fluid = , density of ball = ?

31 / 50

31. A steel ball of radius falls in oil of viscosity . If density of steel = and density of oil = , calculate terminal velocity.

32 / 50

32. Which force resists the expansion of a soap bubble?

33 / 50

33. Why are nanoparticles effective as catalysts in surface chemistry?

34 / 50

34. A liquid of density and viscosity flows with velocity in a pipe of diameter . Find Reynolds number.

35 / 50

35. Atomizers used in perfumes and sprays work on Bernoulli’s principle because:

36 / 50

36. Water at () flows through a tube of diameter at velocity . Calculate Reynolds number.

37 / 50

37. A hydraulic lift is used to raise a car of mass 1500 kg. If the area of the large piston is , find the pressure needed in the system. (Take )

38 / 50

38. Density () of a fluid is defined as:

39 / 50

39. A steel ball of radius is dropped in oil of viscosity . If densities of steel and oil are and , calculate its terminal velocity. ()

40 / 50

40. Pressure is defined as:

41 / 50

41. For a liquid-solid interface, the relation between surface tensions and contact angle is given by:

42 / 50

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

43 / 50

43. Why do paper towels absorb water?

44 / 50

44. Pressure at a point in a liquid depends on:

45 / 50

45. Which of the following factors increases the chance of turbulent flow?

46 / 50

46. A capillary tube of radius is dipped in water. Water rises to . Find surface tension. ()

47 / 50

47. Which of the following summarizes the overall importance of studying fluid mechanics?

48 / 50

48. Which of the following is NOT a pressure-measuring device?

49 / 50

49. Which phenomenon in bubble dynamics is useful in cleaning delicate instruments (like surgical tools)?

50 / 50

50. Which of the following best describes terminal velocity in everyday life?

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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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