Answer mock test 3

1. c) Surface

2. a) Attraction between molecules within the liquid

3. c) Adding a surfactant

4. d) Newton per meter

5. c) Strong hydrogen bonding

6. a) Cohesive, gravitational

7. c) Soap

8. b) Adhesive forces

9. c) Surface tension

10. d) High pressure of water

11. c) Buoyant force overcoming gravity

12. d) Meniscus formation

13. b) Gravitational and cohesive forces

14. b) Decrease surface tension

15. c) Surface tension

16. b) Adhesive and cohesive forces

17. a) Inside the bubble

18. c) Surface tension prevents spreading

19. d) Surface tension of water and insect's legs

20. d) Gravitational force

21. c) Aquaplaning

22. b) Adhesive and cohesive forces

23. c) Adding a surfactant

24. a) Water

25. b) Surface area

26. b) Surface tension decreases with increasing temperature.

27. b) Higher than the liquid level outside the tube

28. c) Increasing adhesive forces

29. b) Adhesive and cohesive forces

30. c) Diameter of the tube

31. c) Capillary action and surface tension

32. c) They form spherical droplets to minimize surface area.

33. d) Surface tension-induced droplet formation

34. b) Water

35. d) Buoyancy

36. b) Adhesive and cohesive forces

37. b) Has high viscosity

38. b) Smaller droplets have lower surface tension.

39. a) Cohesive and adhesive forces

40. b) Low surface tension of water

41. c) Oil

42. a) Cohesive forces

43. c) Surface tension

44. a) Adding salt to the water

45. a) Adhesive and cohesive forces