MCQ Questions for Class 11 Physics Chapter 10 Mechanical Properties of Fluids with Answers

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

Check the below NCERT MCQ Questions for Class 11 Physics Chapter 10 Mechanical Properties of Fluids with Answers Pdf free download. MCQ Questions for Class 11 Physics with Answers were prepared based on the latest exam pattern. We have provided Mechanical Properties of Fluids Class 11 Physics MCQs Questions with Answers to help students understand the concept very well.

## 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

(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

(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

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

(b) 1 mm

(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

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

a) 11%

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

a) rises

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

(c) 8 cm

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

(b) concave