# MCQ for Class 11 Physics Chapter 10 Mechanical Properties of Fluids with answer

MCQ for Class 11 Physics Chapter 10 : MCQs for Class 11 Physics Chapter 10 Mechanical Properties of Fluids with Answers PDF Free Download prepared here according to the latest CBSE RBSE and Other State Board syllabus and NCERT Books.

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## MCQ for Class 11 Physics Chapter 10 Mechanical Properties of Fluids with answer

Q1. A number of small drops of mercury coalesce adiabatically to form a single drop. The temperature of drop

(a) Increases
(b) Is infinite
(c) Remains unchanged
(d) May decrease or increase depending upon size

(d) May decrease or increase depending upon size

Q2. Surface tension of a soap solution is 1.9 × 10-2N/m. work done in blowing a bubble of 2.0 cm diameter will be

(a) 7.6 × 10-6 p J
(b) 15.2 × 10-6 p J
(c) 1.9 × 10-6 p J
(d) 1 × 10-4 p J

(b) 15.2 × 10-6 p J

Q3. Plants get water through the roots because of

(a) Capillarity
(b) Viscosity
(c) Gravity
(d) Elasticity

(a) Capillarity

Q4. Choose the wrong statement from the following.

(a) Small droplets of a liquid are spherical due to surface tension
(b) Oil rises through the wick due to capillarity
(c) In drinking the cold drinks through a straw, we use the phenomenon of capillarity
(d) Gum is used to stick two surfaces. In this process we use the property of Adhesion

(c) In drinking the cold drinks through a straw, we use the phenomenon of capillarity

Q5. The height of a liquid in a fine capillary tube

(a) Increases with an increase in the density of a liquid
(b) Decreases with a decrease in the diameter of the tube
(c) Decreases with an increase in the surface tension
(d) Increases as the effective value of acceleration due to gravity is decreased

(d) Increases as the effective value of acceleration due to gravity is decreased

Q6. At critical temperature, the surface tension of a liquid

(a) Is zero
(b) Is infinity
(c) Is the same as that at any other temperature
(d) Can not be determined

(a) Is zero

Q7. A capillary tube when immersed vertically in a liquid records a rise of 3 cm. if the tube is immersed in the liquid at an angle of 60° with the vertical, then length of the liquid column along the tube will be

(a) 2 cm
(b) 3 cm
(c) 6 cm
(d) 9 cm

(c) 6 cm

Q8. When the angle of contact between a solid and a liquid is 90°, then

(a) Cohesive force > Adhesive force
(b) Cohesive force < Adhesive force

(c) Cohesive force = Adhesive force

(d) Cohesive force >> Adhesive force

(c) Cohesive force = Adhesive force

Q9. Water rises up to a height of 5 cm in a capillary tube of radius 2 mm. what is the radius of the radius of the capillary tube if the water rises up to a height of 10 cm in another capillary?

(a) 4 mm
(b) 1 mm
(c) 3 mm
(d) 1 cm

(b) 1 mm

Q10. If the surface of a liquid is plane, then the angle of contact of the liquid with the walls of container is

(a) Acute angle
(b) Obtuse angle
(c) 90°
(d) 0°

(d) 0°

Q11. Liquid pressure depends upon

a) height of the liquid column
b) directions
c) shape of the liquid surface
d) area of the liquid surface

a) height of the liquid column

Q12. Hydraulic lifts and hydraulic brakes are based on

a) Pascal’s law
b) Bernoulli’s principle
c) Archimedes’ principle
d) Stoke’s law

a) Pascal’s law

Q13. According to archimedes’ principle, loss of weight of a body immersed in a liquid is equal to

a) weight of the liquid displaced
b) weight of the total liquid
c) weight of the body
d) None of these

a) weight of the liquid displaced

Q14. ——- and—– play the same role in case of fluids as force and mass play in case of solids

a) Pressure and density
b) Thrust and volume
c) Thrust and density
d) Pressure and thrust

a) Pressure and density

Q15. Pressure applied to enclosed fluid is

a) transmitted unchanged to every portion of the fluid and wall of containing vessel.
b) increased in proportion to the mass of the fluid and then transmitted
c) diminished and transmitted to wall of container
d) increased and applied to every part of the fluid

a) transmitted unchanged to every portion of the fluid and wall of containing vessel.

Q16. The pressure at the bottom of a tank containing a liquid does not depend on

a) area of the bottom surface
b) nature of the liquid
c) height of the liquid column
d) acceleration due to gravity

a) area of the bottom surface

Q17. Specific gravity of a body is numerically equal to

a) relative density of the body
b) density of body in water
c) weight of the body in water
d) weight of the body in air

a) relative density of the body

Q18. Assertion: A small iron needle sinks in water while a large iron ship floats.
Reason: The shape of iron needle is like a flat surface while the shape of a ship is that which makes it easier to float.

a) Assertion is correct, reason is incorrect
b) Assertion is incorrect, reason is correct
c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
d) Assertion is correct, reason is correct; reason is a correct explanation for assertion

a) Assertion is correct, reason is incorrect

Q19. Consider an iceberg floating in sea water. The density of sea water is 1.03 g/cc and that of ice is 0.92 g/cc. The fraction of total volume of iceberg above the level of sea water is near by

a) 11%
b) 8%
c) 3%
d) 1.8%

a) 11%

Q20. A block of ice floats on a liquid of density 1.2 in a beaker then level of liquid when ice completely melt

a) rises
b) remains same
c) lowers
d) None of these

a) rises

Q21. Water rises up to a height of 4 cm, in a capillary tube immersed vertically in water. What will be the length of water column in the capillary tube, if the tube is immersed in water, at an angle of 60° with the vertical?

(a) 4 cm
(b) 6 cm
(c) 8 cm
(d) 2 cm

(c) 8 cm

Q22. The surface of water in contact with glass wall is

(a) Plane
(b) concave
(c) convex
(d) Both b and c

(b) concave

## MCQ Questions for Class 11 Physics Multiple Choice Questions with Answers

CBSE RBSE Gujarat Board UP Board Bihar Board MP Board Hariyana Board Panjab Board NCERT Objective MCQ Questions of Class 11 Physics with Answers PDF.

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