Test Instructions:
- This Mock test contains 30 MCQ questions.
- Choice and sequence for attempting questions will be as per the convenience of the candidate.
- Read each question carefully.
- Determine the one correct answer out of the four available options given for each question.
- Each question awards you 1 point.
- You can end the test any time by clicking “quiz summary>finish quiz”.
- The mock test will automatically be submitted when the time is up.
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- You can apply for Leaderboard when the result is displayed.
- You can re-attempt the exam as per your wish, yet scores of the first attempt will be recorded!
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- Question 1 of 30
1. Question
1 point(s)Water rises up to a height h1 in a capillary tube of radius r. the mass of the water lifted in the capillary tube is M. if the radius of the capillary tube is doubled, the mass of water that will rise in the capillary tube will be
CorrectIncorrect - Question 2 of 30
2. Question
1 point(s)A number of small drops of mercury coalesce adiabatically to form a single drop. The temperature of drop
CorrectIncorrect - Question 3 of 30
3. Question
1 point(s)The angle of contact between a glass capillary tube of length 10 cm and a liquid is 90°. If the capillary tube is dipped vertically in the liquid, then the liquid
CorrectIncorrect - Question 4 of 30
4. Question
1 point(s)Choose the wrong statement from the following.
CorrectIncorrect - Question 5 of 30
5. Question
1 point(s)If the surface of a liquid is plane, then the angle of contact of the liquid with the walls of container is
CorrectIncorrect - Question 6 of 30
6. Question
1 point(s)The excess pressure in a soap bubble of radius r is proportional to
CorrectIncorrect - Question 7 of 30
7. Question
1 point(s)Water rises in a capillary tube to a certain height such that the upward force due to surface tension is balanced by a force of 75 x 10^-4 N due to the weight of liquid. If the surface tension of water is 6 x 10^-2 N/m then the inner circumference of capillary must be
CorrectIncorrect - Question 8 of 30
8. Question
1 point(s)Coefficient of viscosity does not depends on
CorrectIncorrect - Question 9 of 30
9. Question
1 point(s)Viscous Force on a small sphere of radius r moving in a fluid varies directly with
CorrectIncorrect - Question 10 of 30
10. Question
1 point(s)Two small spheres of radii r and 2r fall through a viscous liquid with same constant speed. The viscous forces experienced by them are in ratio
CorrectIncorrect - Question 11 of 30
11. Question
1 point(s)In streamline flow velocity of liquid at the bottom layer is______
CorrectIncorrect - Question 12 of 30
12. Question
1 point(s)The surface tension of soap is T. The work done in blowing a soap bubble of radius 3R to that of radius 5R is
CorrectIncorrect - Question 13 of 30
13. Question
1 point(s)Two soap bubbles have radii in the ratio of 4:3. What is the ratio of work done to blow this bubbles ?
CorrectIncorrect - Question 14 of 30
14. Question
1 point(s)A soap bubble in vacuum has a radius of 3cm and another soap bubble in vacuum has a radius of 4cm. If the two bubbles coalesce under isothermal condition, then the radius of new bubble is
CorrectIncorrect - Question 15 of 30
15. Question
1 point(s)8000 identical water drops are combined to form a big drop . Then the ratio of final surface energy to initial surface energy of all drops together is
CorrectIncorrect - Question 16 of 30
16. Question
1 point(s)Two tubes of same material but of different radii are dipped in a liquid. The height to a which liquid rises in one tube is 2.2cm and in other tube is 6.6cm . The ratio of their radii is
CorrectIncorrect - Question 17 of 30
17. Question
1 point(s)The U-tube with limbs of diameters 6mm and 3mm contain water of surface tension 7×10-² N/m . The angle of contact is zero and density 10³ kg /m³. If g is 10 m/s² . then the difference in levels in two limbs is
CorrectIncorrect - Question 18 of 30
18. Question
1 point(s)Molecules on the surface of liquid have
CorrectIncorrect - Question 19 of 30
19. Question
1 point(s)A rectangular film of liquid is extended from (4cm x 2cm ) to (5cm x 4cm ). If the work done is 3 x 10^-4J.The value of surface tension of liquid is
CorrectIncorrect - Question 20 of 30
20. Question
1 point(s)Water from pipe is coming at the rate of 100liters per minute. If the radius of pipe is 5cm , the Reynolds number for the flow is of the order of :(density of water : 1000 kg/m³ , coefficient of viscosity of water = 1mPa s)
CorrectIncorrect - Question 21 of 30
21. Question
1 point(s)The work done in blowing a soap bubble of radius R is W1 and that to a radius 3R is W2. the ratio of work done is
CorrectIncorrect - Question 22 of 30
22. Question
1 point(s)Rain drops are spherical in shape because of
CorrectIncorrect - Question 23 of 30
23. Question
1 point(s)The height of water in a capillary tube of radius 2 cm is 4 cm. what should be the radius of capillary, if the water rises to 8 cm in tube?
CorrectIncorrect - Question 24 of 30
24. Question
1 point(s)The surface tension for pure water in a capillary tube experiment is
A.
B.
C.
D.
CorrectIncorrect - Question 25 of 30
25. Question
1 point(s)One thousand small water droplets of equal size combine to form a big drop. The ratio of the final surface energy to the initial surface energy is
(Surface tension of water = 70 dyne/cm)
CorrectIncorrect - Question 26 of 30
26. Question
1 point(s)Water can rise up to a height of 12 cm in a capillary tube. If the tube is lowered to keep only 9 cm above the water level then the water at the upper end of the capillary will
CorrectIncorrect - Question 27 of 30
27. Question
1 point(s)A square frame of length L is immersed in soap solution and taken out. The force experienced by the square plate is
CorrectIncorrect - Question 28 of 30
28. Question
1 point(s)A drop of liquid of diameter 2.8 mm beaks up into 125 identical drops. The change in energy is nearly
(S.T. of liquid = 75 × 10–3 N/m)
CorrectIncorrect - Question 29 of 30
29. Question
1 point(s)5 g of water rises in the bore of capillary tube when it is dipped in water. If the radius of bore capillary tube is doubled, the mass of water that rises in the capillary tube above the outside water level is
CorrectIncorrect - Question 30 of 30
30. Question
1 point(s)The dimension of surface tension are
CorrectIncorrect
