In Class 11 Final Exams there will be Case studies and Passage Based Questions will be asked, So practice these types of questions. Study Rate is always there to help you. Free PDF Downloads of CBSE Class 11 Physics Chapter 10 Case Study and Passage-Based Questions with Answers were Prepared Based on the Latest Exam Pattern. Students can solve Class 11 Physics Case Study Questions Mechanical Properties of Fluids to know their preparation level.
Join our Telegram Channel, there you will get various e-books for CBSE 2024 Boards exams for Class 9th, 10th, 11th, and 12th.
In CBSE Class 11 Physics Paper, There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.
Mechanical Properties of Fluids Case Study Questions With Answers
Here, we have provided case-based/passage-based questions for Class 11 Physics Chapter 10 Mechanical Properties of Fluids
Case Study/Passage-Based Questions
Case Study 1: The property due to which the free surface of liquid tends to have the minimum surface area and behaves like a stretched membrane is called surface tension. It is a force per unit length acting in the plane of interface between the liquid and the bounding surface i.e., S = F/L, where F = force acting on either side of an imaginary line on the surface and L = length of the imaginary line. Surface tension decreases with a rise in temperature. Highly soluble impurities increase surface tension and sparingly soluble impurities decrease surface tension.
The excess pressure inside a soap bubble is three times than excess pressure inside a second soap bubble, then the ratio of their surface area is
(a) 9 : 1 (b) 1 : 3 (c) 1 : 9 (d) 3 : 1
Answer: (c) 1:9
Which of the following statements is not true about surface tension?
(a) A small liquid drop takes spherical shape due to surface tension.
(b) Surface tension is a vector quantity.
(c) Surface tension of liquid is a molecular phenomenon.
(d) Surface tension of liquid depends on length but not on the area.
Answer: (b) Surface tension is a vector quantity.
Which of the following statement is not true about the angle of contact?
(a) The value of the angle of contact for pure water and glass is zero.
(b) Angle of contact increases with an increase in the temperature of the liquid.
(c) If the angle of contact between a liquid and a solid surface is less than 90°, then the liquid spreads on the surface of the solid.
(d) Angle of contact depends upon the inclination of the solid surface to the liquid surface.
Answer: (d) Angle of contact depends upon the inclination of the solid surface to the liquid surface.
Which of the following statements is correct?
(a) Viscosity is a vector quantity.
(b) Surface tension is a vector quantity.
(c) Reynolds number is a dimensionless quantity.
(d) Angle of contact is a vector quantity
Answer: (c) Reynolds number is a dimensionless quantity.
A liquid does not wet the solid surface if the angle of contact is
(a) 0° (b) equal to 45°
(c) equal to 90° (d) greater than 90°
Answer: (d) greater than 90°
Case Study 2:It has been found that a liquid in small quantity at rest, free from an external force like gravity, always tends to have a spherical shape. Since for a given volume, a sphere has the least surface area, hence it shows that the free surface of every liquid at rest has a tendency to have the least surface area. The free surface of a liquid behaves as if covered by a stretched membrane, having tension in all directions parallel to the surface. This tension in the free surface of the liquid at rest is called surface tension. It arises due to the fact that the free surface of the liquid at rest has some additional potential energy.
Why does a liquid in small quantity and at rest, free from external forces, tend to have a spherical shape?
a) Because the sphere has the maximum surface area for a given volume.
b) Because the sphere has the least surface area for a given volume.
c) Because the sphere is the most stable geometric shape.
d) Because liquids naturally prefer the spherical shape.
Answer: b) Because the sphere has the least surface area for a given volume.
How does the free surface of a liquid at rest behave?
a) As if covered by a compressed membrane, having tension in all directions perpendicular to the surface.
b) As if covered by a stretched membrane, having tension in all directions parallel to the surface.
c) As if covered by a porous membrane, having tension in all directions perpendicular to the surface.
d) As if covered by a thin film, having tension in all directions parallel to the surface.
Answer: b) As if covered by a stretched membrane, having tension in all directions parallel to the surface.
What is the term for the tension in the free surface of a liquid at rest?
a) Volume tension
b) Surface tension
c) Liquid tension
d) Membrane tension
Answer: b) Surface tension
Why does the free surface of a liquid at rest have additional potential energy?
a) Because of the extra energy required to maintain its shape.
b) Because of the high kinetic energy of the molecules at the surface.
c) Because of the tension in the free surface of the liquid.
d) Because of the gravitational potential energy of the liquid.
Answer: c) Because of the tension in the free surface of the liquid.
Which of the following could disrupt the spherical shape of a small liquid quantity at rest in the absence of gravity?
a) Changes in temperature
b) Addition of a solute
c) Both A and B
d) None of the above
Answer: c) Both A and B
Hope the information shed above regarding Case Study and Passage Based Questions for Class 11 Physics Chapter 10 Mechanical Properties of Fluids with Answers Pdf free download has been useful to an extent. If you have any other queries about the CBSE Class 11 Physics Mechanical Properties of Fluids Case Study and Passage-Based Questions with Answers, feel free to comment below so that we can revert back to us at the earliest possible.
By Team Study Rate
