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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. The excess pressure inside a soap bubble of radius is 30 Pa. Find surface tension.

2 / 30

2. In medical applications, the Venturi mask works on the Venturi effect to:

3 / 30

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

4 / 30

4. 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?

5 / 30

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

6 / 30

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

7 / 30

7. Why is fluid mechanics essential in chemical engineering?

8 / 30

8. In which of the following medical technologies is fluid mechanics most relevant?

9 / 30

9. Liquids differ from gases in their response to shear stress because:

10 / 30

10. An obtuse contact angle () signifies that:

11 / 30

11. Which of the following assumptions is made in deriving Stokes’ law?

12 / 30

12. Capillary action in soils is most important for:

13 / 30

13. 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.

14 / 30

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

15 / 30

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

16 / 30

16. In ocean currents, Reynolds numbers are typically of the order of:

17 / 30

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

18 / 30

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

19 / 30

19. Which scientist first formulated Pascal’s law?

20 / 30

20. If a diver is 20 m below the surface of freshwater (), what is the pressure due to water at that depth? (Take )

21 / 30

21. At the critical temperature of a liquid, surface tension becomes:

22 / 30

22. The hydrophilic part of a detergent molecule is:

23 / 30

23. Which of the following correctly describes the effect of gravity on capillary rise?

24 / 30

24. A cylindrical tank of height 6 m is filled with water (). Find the pressure at the bottom of the tank. (Take )

25 / 30

25. Why do overwatered plants often die despite soil saturation?

26 / 30

26. The lift of an airplane wing is explained by:

27 / 30

27. In Bernoulli’s derivation, work done by pressure forces on a fluid element is balanced by:

28 / 30

28. Air () flows with velocity in a duct of diameter . Find Reynolds number.

29 / 30

29. Why is mercury commonly used in barometers and manometers instead of water?

30 / 30

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

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

2 / 50

2. The Reynolds experiment demonstrates:

3 / 50

3. When detergent is added to water, the angle of contact with glass:

4 / 50

4. A tank has kerosene of density to a height of 4 m. Calculate the hydrostatic pressure at the bottom. (Take )

5 / 50

5. A 4 cm radius pipe carries water at 2 m/s. It branches into two pipes each of radius 2 cm. Find velocity in each branch.

6 / 50

6. Which of the following decreases the height of capillary rise?

7 / 50

7. If a diver is 20 m below the surface of freshwater (), what is the pressure due to water at that depth? (Take )

8 / 50

8. The expression for terminal velocity of a spherical particle in a viscous medium is:

9 / 50

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

10 / 50

10. When a soap bubble is blown larger, its internal pressure:

11 / 50

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

12 / 50

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

13 / 50

13. In a hydraulic press, the input piston has an area of . A force of 100 N is applied on it. If the output piston has an area of , calculate the load lifted.

14 / 50

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

15 / 50

15. A horizontal pipe has two sections of diameters and . If velocity at the wider end is , find velocity at the narrow end.

16 / 50

16. Two bubbles of radii are connected by a tube. Which statement is correct?

17 / 50

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

18 / 50

18. A ball of radius 1 mm is moving in a viscous liquid with velocity 0.01 m/s. If the viscous drag experienced is , calculate the viscosity of the liquid.

19 / 50

19. When two soap bubbles of equal size coalesce, the surface energy:

20 / 50

20. A gas flows at in a duct of diameter . If density = and viscosity = , calculate Reynolds number.

21 / 50

21. Hydrostatic pressure does NOT depend on:

22 / 50

22. The excess pressure inside a water drop of radius is . Find surface tension.

23 / 50

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

24 / 50

24. Ocean currents typically belong to which Reynolds number regime?

25 / 50

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

26 / 50

26. 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 ?

27 / 50

27. Why does a soap film contract after formation?

28 / 50

28. If surface tension of water decreases due to detergent, the shape of droplets formed will be:

29 / 50

29. If the pressure difference between two points in a horizontal pipe is , and velocities are and , find the density of the fluid.

30 / 50

30. Why do sandy soils drain water quickly compared to clay soils?

31 / 50

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

32 / 50

32. Why does a gas exert uniform pressure in all directions inside a container, unlike a liquid?

33 / 50

33. Which branch of engineering applies fluid mechanics extensively in the design of aircrafts?

34 / 50

34. In Bernoulli’s derivation, work done by pressure forces on a fluid element is balanced by:

35 / 50

35. A hydraulic lift has two pistons. The smaller piston has an area of and the larger piston has an area of . If a load of 8000 N is to be lifted, calculate the force required on the smaller piston.

36 / 50

36. In capillary rise method, the height of liquid column is inversely proportional to:

37 / 50

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

38 / 50

38. Glycerin () flows in a tube of diameter with velocity . Calculate Reynolds number.

39 / 50

39. The hydrophilic part of a detergent molecule is:

40 / 50

40. The design of submarines is mainly based on:

41 / 50

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

42 / 50

42. The pressure at a depth in a liquid of density is given by:

43 / 50

43. Why do parachutes slow down a falling person?

44 / 50

44. A liquid flows through a capillary tube of radius and length . If the flow rate is under a pressure difference of , calculate its viscosity.

45 / 50

45. Which factor is neglected in Bernoulli’s principle but is important in real-world flows?

46 / 50

46. A ball of radius falls through oil of viscosity with density difference . Calculate terminal velocity.

47 / 50

47. A steel ball of radius is falling through glycerin of viscosity . The densities of steel and glycerin are and . Calculate its terminal velocity. ()

48 / 50

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

49 / 50

49. Which factor is directly measured in all experimental methods of surface tension?

50 / 50

50. Which of the following does NOT affect terminal velocity?

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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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