{"id":17597,"date":"2025-11-08T08:37:58","date_gmt":"2025-11-08T08:37:58","guid":{"rendered":"https:\/\/mcqsadda.com\/?p=17597"},"modified":"2025-11-08T09:10:07","modified_gmt":"2025-11-08T09:10:07","slug":"surface-tension-top-100-mcqs-with-answer-and-explanation-2","status":"publish","type":"post","link":"https:\/\/mcqsadda.com\/index.php\/2025\/11\/08\/surface-tension-top-100-mcqs-with-answer-and-explanation-2\/","title":{"rendered":"Surface Tension Top 100 MCQs With Answer and Explanation"},"content":{"rendered":"\n

1. Surface tension is caused by<\/mark><\/strong>
A) Cohesive forces
B) Adhesive forces
C) Friction
D) Gravity
Answer:<\/strong> A) Cohesive forces
Explanation:<\/strong> Molecules at the surface experience an inward pull due to cohesive forces, creating surface tension.<\/p>\n\n\n\n

2. Surface tension acts<\/strong>
<\/mark>A) Tangentially to the surface
B) Perpendicular to the surface
C) Vertically upward
D) Randomly
Answer:<\/strong> A) Tangentially to the surface
Explanation:<\/strong> The force acts along the surface, trying to minimize the area.<\/p>\n\n\n\n

3. The SI unit of surface tension is<\/mark><\/strong>
A) Newton per meter
B) Newton per square meter
C) Joule
D) Pascal
Answer:<\/strong> A) Newton per meter
Explanation:<\/strong> It measures the force per unit length along the surface.<\/p>\n\n\n\n

4. Surface tension of a liquid decreases with<\/mark><\/strong>
A) Increase in temperature
B) Decrease in temperature
C) Increase in pressure
D) Decrease in pressure
Answer:<\/strong> A) Increase in temperature
Explanation:<\/strong> Heat reduces molecular attraction, thus reducing surface tension.<\/p>\n\n\n\n

5. The shape of a liquid drop is spherical because<\/mark><\/strong>
A) Gravity
B) Viscosity
C) Surface tension
D) Adhesion
Answer:<\/strong> C) Surface tension
Explanation:<\/strong> A sphere has the smallest surface area for a given volume.<\/p>\n\n\n\n

6. Surface tension is a property of<\/mark><\/strong>
A) Liquids
B) Solids
C) Gases
D) All states of matter
Answer:<\/strong> A) Liquids
Explanation:<\/strong> It occurs at the liquid-air interface due to molecular attraction.<\/p>\n\n\n\n

7. When detergent is added to water, its surface tension<\/mark><\/strong>
A) Decreases
B) Increases
C) Remains same
D) Becomes zero
Answer:<\/strong> A) Decreases
Explanation:<\/strong> Detergent molecules reduce cohesive forces between water molecules.<\/p>\n\n\n\n

8. The rise of liquid in a thin tube is due to<\/mark><\/strong>
A) Surface tension
B) Viscosity
C) Density
D) Pressure difference
Answer:<\/strong> A) Surface tension
Explanation:<\/strong> Surface tension pulls the liquid along the tube walls causing capillary rise.<\/p>\n\n\n\n

9. The meniscus of water in a glass tube is<\/mark><\/strong>
A) Concave
B) Convex
C) Flat
D) Irregular
Answer:<\/strong> A) Concave
Explanation:<\/strong> Water wets glass, forming a concave surface.<\/p>\n\n\n\n

10. The meniscus of mercury in a glass tube is<\/mark><\/strong>
A) Convex
B) Concave
C) Flat
D) Horizontal
Answer:<\/strong> A) Convex
Explanation:<\/strong> Mercury does not wet glass, creating a convex surface.<\/p>\n\n\n\n

11. Capillarity is the phenomenon due to<\/mark><\/strong>
A) Surface tension
B) Density
C) Viscosity
D) Friction
Answer:<\/strong> A) Surface tension
Explanation:<\/strong> It causes the liquid to rise or fall in narrow tubes.<\/p>\n\n\n\n

12. The liquid that does not wet the solid surface shows<\/mark><\/strong>
A) Depression in capillary
B) Rise in capillary
C) Flat surface
D) Uniform height
Answer:<\/strong> A) Depression in capillary
Explanation:<\/strong> When cohesion dominates adhesion, the liquid level falls.<\/p>\n\n\n\n

13. Soap solution has lower surface tension than water because<\/mark><\/strong>
A) It contains surfactants
B) It contains salt
C) It contains alcohol
D) It has less density
Answer:<\/strong> A) It contains surfactants
Explanation:<\/strong> Surfactants reduce molecular attraction in the surface layer.<\/p>\n\n\n\n

14. Mercury does not wet glass because<\/mark><\/strong>
A) Cohesive forces are stronger than adhesive forces
B) Adhesive forces are stronger
C) Gravity acts downward
D) Mercury is a metal
Answer:<\/strong> A) Cohesive forces are stronger than adhesive forces<\/p>\n\n\n\n

15. Water wets glass because<\/mark><\/strong>
A) Adhesive forces are stronger than cohesive forces
B) Cohesive forces are stronger
C) It is dense
D) Gravity helps
Answer:<\/strong> A) Adhesive forces are stronger<\/p>\n\n\n\n

16. The insects walking on water are supported by<\/mark><\/strong>
A) Surface tension
B) Buoyancy
C) Density
D) Friction
Answer:<\/strong> A) Surface tension
Explanation:<\/strong> The stretched surface layer of water supports light insects.<\/p>\n\n\n\n

17. The property responsible for spherical soap bubbles is<\/mark><\/strong>
A) Surface tension
B) Elasticity
C) Pressure
D) Viscosity
Answer:<\/strong> A) Surface tension<\/p>\n\n\n\n

18. The addition of salt to water<\/mark><\/strong>
A) Increases surface tension
B) Decreases surface tension
C) Has no effect
D) Destroys surface tension
Answer:<\/strong> A) Increases surface tension
Explanation:<\/strong> Salt strengthens intermolecular attraction.<\/p>\n\n\n\n

19. Surface tension is maximum for<\/mark><\/strong>
A) Mercury
B) Water
C) Alcohol
D) Kerosene
Answer:<\/strong> A) Mercury
Explanation:<\/strong> Metallic bonding gives mercury very strong cohesive forces.<\/p>\n\n\n\n

20. A clean glass capillary shows<\/strong>
<\/mark>A) Rise of water
B) Fall of mercury
C) Both A and B
D) None
Answer:<\/strong> C) Both A and B<\/p>\n\n\n\n

21. Capillary rise is more in<\/mark><\/strong>
A) Narrow tube
B) Wide tube
C) Both same
D) Irregular tube
Answer:<\/strong> A) Narrow tube
Explanation:<\/strong> Narrower tubes have higher capillary action.<\/p>\n\n\n\n

22. The energy associated with the surface of a liquid is called<\/mark><\/strong>
A) Surface energy
B) Kinetic energy
C) Potential energy
D) Thermal energy
Answer:<\/strong> A) Surface energy<\/p>\n\n\n\n

23. The surface tension of hot water is<\/mark><\/strong>
A) Less than that of cold water
B) Greater than cold water
C) Equal
D) Zero
Answer:<\/strong> A) Less than that of cold water<\/p>\n\n\n\n

24. Surface tension depends on<\/mark><\/strong>
A) Nature of liquid
B) Temperature
C) Impurities
D) All of these
Answer:<\/strong> D) All of these<\/p>\n\n\n\n

25. The work done to increase the surface area of a liquid is stored as<\/mark><\/strong>
A) Surface energy
B) Heat energy
C) Kinetic energy
D) Gravitational energy
Answer:<\/strong> A) Surface energy<\/p>\n\n\n\n

26. Soap helps in cleaning because it<\/mark><\/strong>
A) Lowers surface tension of water
B) Increases surface tension
C) Makes water hard
D) Removes cohesion
Answer:<\/strong> A) Lowers surface tension of water

27. The phenomenon of surface tension is absent in<\/mark><\/strong>
A) Solids
B) Liquids
C) Gases
D) Vacuum
Answer:<\/strong> D) Vacuum
Explanation:<\/strong> No molecules exist in vacuum to create tension.<\/p>\n\n\n\n

28. Surface tension tries to<\/mark><\/strong>
A) Decrease the surface area of a liquid
B) Increase the surface area
C) Keep area constant
D) Remove pressure
Answer:<\/strong> A) Decrease the surface area<\/p>\n\n\n\n

29. When small droplets combine to form a big drop,<\/mark><\/strong>
A) Surface energy decreases
B) Surface energy increases
C) Energy remains constant
D) Pressure increases
Answer:<\/strong> A) Surface energy decreases<\/p>\n\n\n\n

30. At the critical temperature of a liquid, surface tension<\/mark><\/strong>
A) Becomes zero
B) Becomes maximum
C) Remains constant
D) Doubles
Answer:<\/strong> A) Becomes zero<\/p>\n\n\n\n

31. Capillary rise stops when<\/mark><\/strong>
A) Weight of liquid balances upward surface force
B) Tube is filled
C) Pressure equals zero
D) Liquid evaporates
Answer:<\/strong> A) Weight of liquid balances upward surface force<\/p>\n\n\n\n

32. The surface of a liquid behaves like<\/mark><\/strong>
A) A stretched elastic membrane
B) A solid wall
C) A porous sheet
D) A rough layer
Answer:<\/strong> A) A stretched elastic membrane<\/p>\n\n\n\n

33. Surface tension is responsible for<\/mark><\/strong>
A) Formation of raindrops
B) Floating of needle on water
C) Capillary rise
D) All of these
Answer:<\/strong> D) All of these<\/p>\n\n\n\n

34. The floating of camphor pieces on water is due to<\/mark><\/strong>
A) Surface tension
B) Density
C) Adhesion
D) Capillarity
Answer:<\/strong> A) Surface tension<\/p>\n\n\n\n

35. Detergents clean better in<\/mark><\/strong>
A) Hot water
B) Cold water
C) Both same
D) Ice water
Answer:<\/strong> A) Hot water
Explanation:<\/strong> Heat lowers surface tension, making detergent more effective.<\/p>\n\n\n\n

36. Surface tension is not affected much by<\/mark><\/strong>
A) Normal pressure changes
B) Temperature
C) Impurities
D) Chemical nature
Answer:<\/strong> A) Normal pressure changes<\/p>\n\n\n\n

37. The property responsible for formation of soap bubbles is<\/mark><\/strong>
A) Surface tension
B) Elasticity
C) Density
D) Viscosity
Answer:<\/strong> A) Surface tension<\/p>\n\n\n\n

38. When oil spreads on water, it forms a thin film because<\/mark><\/strong>
A) Its surface tension is lower
B) It is lighter
C) It mixes with water
D) It evaporates
Answer:<\/strong> A) Its surface tension is lower<\/p>\n\n\n\n

39. Surface tension is measured using<\/mark><\/strong>
A) Capillary rise method
B) Drop method
C) Ring method
D) All of these
Answer:<\/strong> D) All of these<\/p>\n\n\n\n

40. The contact angle for water and glass is<\/mark><\/strong>
A) Small or zero
B) Ninety degrees
C) Large
D) Undefined
Answer:<\/strong> A) Small or zero<\/p>\n\n\n\n

41. The pressure inside a soap bubble is<\/mark><\/strong>
A) Greater than outside pressure
B) Equal to outside pressure
C) Less than outside pressure
D) Same as atmosphere
Answer:<\/strong> A) Greater than outside pressure
Explanation:<\/strong> Surface tension compresses the air inside, increasing its pressure.<\/p>\n\n\n\n

42. When the radius of a bubble decreases, the pressure inside<\/mark><\/strong>
A) Increases
B) Decreases
C) Remains constant
D) Becomes zero
Answer:<\/strong> A) Increases
Explanation:<\/strong> Smaller bubbles have more curvature, so surface tension makes the internal pressure higher.<\/p>\n\n\n\n

43. When a soap bubble bursts,<\/mark><\/strong>
A) The air inside escapes
B) The bubble collapses
C) Surface energy is released
D) All of these
Answer:<\/strong> D) All of these<\/p>\n\n\n\n

44. The temperature at which the surface tension becomes zero is called<\/strong>
<\/mark>A) Critical temperature
B) Boiling point
C) Melting point
D) Triple point
Answer:<\/strong> A) Critical temperature
Explanation:<\/strong> At this point, liquid and vapor become indistinguishable.<\/p>\n\n\n\n

45. The rise of a liquid in a capillary tube is due to<\/strong>
<\/mark>A) Surface tension and adhesion
B) Gravity
C) Viscosity
D) Elasticity
Answer:<\/strong> A) Surface tension and adhesion<\/p>\n\n\n\n

46. When water is cooled, its surface tension<\/mark><\/strong>
A) Increases
B) Decreases
C) Remains constant
D) Becomes zero
Answer:<\/strong> A) Increases
Explanation:<\/strong> Lower temperature strengthens molecular attraction.<\/p>\n\n\n\n

47. Surface tension of liquids is generally<\/mark><\/strong>
A) Greater for pure liquids
B) Greater for impure liquids
C) Independent of purity
D) Random
Answer:<\/strong> A) Greater for pure liquids<\/p>\n\n\n\n

48. If the surface area of a liquid increases, its potential energy<\/mark><\/strong>
A) Increases
B) Decreases
C) Remains same
D) Becomes zero
Answer:<\/strong> A) Increases
Explanation:<\/strong> Larger surface area means more surface molecules and higher energy.<\/p>\n\n\n\n

49. When a needle floats on water, it is due to<\/mark><\/strong>
A) Surface tension
B) Density difference
C) Buoyancy
D) Adhesion
Answer:<\/strong> A) Surface tension<\/p>\n\n\n\n

50. Liquids which wet solids have<\/mark><\/strong>
A) Stronger adhesive forces than cohesive forces
B) Stronger cohesive forces
C) Equal forces
D) No molecular forces
Answer:<\/strong> A) Stronger adhesive forces than cohesive forces<\/p>\n\n\n\n

51. Surface tension is not observed in<\/mark><\/strong>
A) Gases
B) Solids
C) Liquids
D) Plasma
Answer:<\/strong> A) Gases
Explanation:<\/strong> Gas molecules are far apart, so cohesive forces are negligible.<\/p>\n\n\n\n

52. The liquid which shows capillary depression is<\/mark><\/strong>
A) Mercury
B) Water
C) Alcohol
D) Milk
Answer:<\/strong> A) Mercury
Explanation:<\/strong> Mercury does not wet glass; its level falls.<\/p>\n\n\n\n

53. The meniscus of mercury in glass is<\/mark><\/strong>
A) Convex
B) Concave
C) Flat
D) Irregular
Answer:<\/strong> A) Convex<\/p>\n\n\n\n

54. The meniscus of water in glass is<\/mark><\/strong>
A) Concave
B) Convex
C) Flat
D) Circular
Answer:<\/strong> A) Concave<\/p>\n\n\n\n

55. Surface tension acts<\/mark><\/strong>
A) Along the surface of the liquid
B) Normal to the surface
C) Vertically downward
D) Upward
Answer:<\/strong> A) Along the surface of the liquid<\/p>\n\n\n\n

56. Surface tension is maximum in<\/mark><\/strong>
A) Mercury
B) Alcohol
C) Kerosene
D) Water
Answer:<\/strong> A) Mercury<\/p>\n\n\n\n

57. Capillary rise or fall depends on<\/mark><\/strong>
A) Surface tension and adhesive forces
B) Density of air
C) Volume of liquid
D) Mass of liquid
Answer:<\/strong> A) Surface tension and adhesive forces<\/p>\n\n\n\n

58. Surface tension decreases when<\/mark><\/strong>
A) Temperature rises
B) Impurities are added
C) Soap is mixed
D) All of these
Answer:<\/strong> D) All of these<\/p>\n\n\n\n

59. A detergent acts as a<\/mark><\/strong>
A) Surface tension reducing agent
B) Surface tension increasing agent
C) Neutral agent
D) Solidifier
Answer:<\/strong> A) Surface tension reducing agent<\/p>\n\n\n\n

60. The floating of camphor pieces on water surface is due to<\/mark><\/strong>
A) Surface tension variation
B) Buoyancy
C) Density
D) Cohesion
Answer:<\/strong> A) Surface tension variation<\/p>\n\n\n\n

61. Oil spreads over water because<\/mark><\/strong>
A) Oil has less surface tension than water
B) Oil is heavier
C) Oil dissolves in water
D) Oil repels water
Answer:<\/strong> A) Oil has less surface tension than water<\/p>\n\n\n\n

62. The shape of a free soap bubble is<\/mark><\/strong>
A) Spherical
B) Elliptical
C) Cylindrical
D) Irregular
Answer:<\/strong> A) Spherical
Explanation:<\/strong> Surface tension makes the bubble\u2019s surface area minimum.<\/p>\n\n\n\n

63. When two soap bubbles join, the new bubble has<\/mark><\/strong>
A) Larger radius
B) Smaller radius
C) Same radius
D) No definite shape
Answer:<\/strong> A) Larger radius<\/p>\n\n\n\n

64. The rise of water in a glass tube shows that<\/mark><\/strong>
A) Water wets glass
B) Water does not wet glass
C) Mercury wets glass
D) Surface tension is zero
Answer:<\/strong> A) Water wets glass<\/p>\n\n\n\n

65. If the radius of a capillary tube is reduced, the rise of liquid<\/mark><\/strong>
A) Increases
B) Decreases
C) Remains constant
D) Stops
Answer:<\/strong> A) Increases<\/p>\n\n\n\n

66. The value of surface tension for water is approximately<\/mark><\/strong>
A) High
B) Medium
C) Low
D) Very low
Answer:<\/strong> A) High<\/p>\n\n\n\n

67. When impurities are added to a liquid, its surface tension<\/mark><\/strong>
A) May increase or decrease
B) Always increases
C) Always decreases
D) Remains constant
Answer:<\/strong> A) May increase or decrease<\/p>\n\n\n\n

68. Surface tension depends upon<\/mark><\/strong>
A) Nature of liquid
B) Surrounding medium
C) Temperature
D) All of these
Answer:<\/strong> D) All of these<\/p>\n\n\n\n

69. Surface energy and surface tension are<\/mark><\/strong>
A) Numerically equal
B) Opposite in nature
C) Unrelated
D) Always different
Answer:<\/strong> A) Numerically equal<\/p>\n\n\n\n

70. The spherical shape of raindrops is due to<\/mark><\/strong>
A) Surface tension
B) Air resistance
C) Gravity
D) Pressure difference
Answer:<\/strong> A) Surface tension<\/p>\n\n\n\n

71. The pressure inside small raindrops is<\/mark><\/strong>
A) More than the outside
B) Less than outside
C) Same as outside
D) Equal to atmospheric
Answer:<\/strong> A) More than the outside<\/p>\n\n\n\n

72. Surface tension of liquids is reduced by<\/mark><\/strong>
A)<\/strong> Heating
B)<\/strong> Adding soap
C)<\/strong> Adding alcohol
D)<\/strong> All of these
Answer:<\/strong> D) All of these<\/p>\n\n\n\n

73. The capillary action will be less if<\/mark><\/strong>
A) Tube is wide
B) Tube is narrow
C) Adhesion is strong
D) Cohesion is weak
Answer:<\/strong> A) Tube is wide<\/p>\n\n\n\n

74. When a liquid wets the surface of a solid, the angle of contact is<\/mark><\/strong>
A) Acute
B) Right angle
C) Obtuse
D) Zero
Answer:<\/strong> A) Acute<\/p>\n\n\n\n

75. The excess pressure inside a bubble depends on<\/mark><\/strong>
A) Surface tension
B) Size of the bubble
C) Both A and B
D) None
Answer:<\/strong> C) Both A and B<\/p>\n\n\n\n

76. Surface tension decreases sharply when<\/mark><\/strong>
A) Detergent is added
B) Salt is added
C) Temperature falls
D) Pressure increases
Answer:<\/strong> A) Detergent is added<\/p>\n\n\n\n

77. Which of the following liquids has least surface tension?<\/mark><\/strong>
A) Alcohol
B) Water
C) Mercury
D) Kerosene
Answer:<\/strong> A) Alcohol<\/p>\n\n\n\n

78. The rise of liquid in a capillary is greater if<\/mark><\/strong>
A) Density of liquid is small
B) Tube is thinner
C) Adhesion is stronger
D) All of these
Answer:<\/strong> D) All of these

79. The angle of contact for mercury and glass is<\/mark><\/strong>
A) Obtuse
B) Acute
C) Zero
D) Ninety degrees
Answer:<\/strong> A) Obtuse<\/p>\n\n\n\n

80. The unit of surface tension can also be expressed as<\/mark><\/strong>
A) Energy per unit area
B) Force per unit length
C) Both A and B
D) Pressure
Answer:<\/strong> C) Both A and B<\/p>\n\n\n\n

81. Surface tension causes small drops of liquid to<\/strong>
<\/mark>A) Merge into a single larger drop
B) Repel each other
C) Spread widely
D) Evaporate faster
Answer:<\/strong> A) Merge into a single larger drop<\/p>\n\n\n\n

82. The value of surface tension of water is greater than that of<\/mark><\/strong>
A) Alcohol
B) Kerosene
C) Petrol
D) All of these
Answer:<\/strong> D) All of these<\/p>\n\n\n\n

83. The rise of a liquid in a narrow tube is called<\/mark><\/strong>
A) Capillary rise
B) Diffusion
C) Adhesion
D) Viscosity
Answer:<\/strong> A) Capillary rise<\/p>\n\n\n\n

84. The depression of mercury in a glass tube is called<\/mark><\/strong>
A) Capillary fall
B) Capillary rise
C) Surface fall
D) None
Answer:<\/strong> A) Capillary fall<\/p>\n\n\n\n

85. When two drops combine to form one, the total energy<\/mark><\/strong>
A) Decreases
B) Increases
C) Remains same
D) Becomes zero
Answer:<\/strong> A) Decreases<\/p>\n\n\n\n

86. A soap bubble is lighter than air because<\/mark><\/strong>
A) It contains air under low pressure
B) It is filled with vacuum
C) It floats by surface tension
D) It contains hydrogen
Answer:<\/strong> A) It contains air under low pressure<\/p>\n\n\n\n

87. The work done in blowing a bubble appears as<\/mark><\/strong>
A) Surface energy
B) Heat
C) Elastic energy
D) Sound
Answer:<\/strong> A) Surface energy<\/p>\n\n\n\n

88. A liquid with high surface tension tends to<\/mark><\/strong>
A) Form spherical drops
B) Spread easily
C) Evaporate quickly
D) Mix with others
Answer:<\/strong> A) Form spherical drops<\/p>\n\n\n\n

89. A liquid wets a solid when<\/strong>
<\/mark>A) Adhesion exceeds cohesion
B) Cohesion exceeds adhesion
C) Both equal
D) Surface tension is high
Answer:<\/strong> A) Adhesion exceeds cohesion<\/p>\n\n\n\n

90. A non-wetting liquid forms<\/mark><\/strong>
A) Convex meniscus
B) Concave meniscus
C) Flat surface
D) Irregular surface
Answer:<\/strong> A) Convex meniscus<\/p>\n\n\n\n

91. Surface tension is responsible for<\/mark><\/strong>
A) Formation of soap bubbles
B) Rise of liquid in capillaries
C) Floating of insects on water
D) All of these
Answer:<\/strong> D) All of these<\/p>\n\n\n\n

92. The property of liquids that resists external force on the surface is<\/strong>
<\/mark>A) Surface tension
B) Viscosity
C) Density
D) Elasticity
Answer:<\/strong> A) Surface tension<\/p>\n\n\n\n

93. Surface tension acts only at<\/mark><\/strong>
A) The surface layer
B) The bottom
C) The sides
D) Entire volume
Answer:<\/strong> A) The surface layer<\/p>\n\n\n\n

94. The angle between the tangent to liquid surface and solid surface is called<\/mark><\/strong>
A) Angle of contact
B) Angle of friction
C) Angle of cohesion
D) Angle of adhesion
Answer:<\/strong> A) Angle of contact<\/p>\n\n\n\n

95. Surface tension tends to<\/mark><\/strong>
A) Reduce surface area
B) Increase volume
C) Increase surface area
D) Reduce volume
Answer:<\/strong> A) Reduce surface area<\/p>\n\n\n\n

96. The molecules at the surface of a liquid have<\/mark><\/strong>
A) Higher potential energy
B) Lower potential energy
C) Equal energy
D) No energy
Answer:<\/strong> A) Higher potential energy<\/p>\n\n\n\n

97. The unit of surface energy is same as that of<\/mark><\/strong>
A) Surface tension
B) Energy
C) Pressure
D) Work
Answer:<\/strong> A) Surface tension<\/p>\n\n\n\n

98. The cleaning power of soap solution depends on<\/mark><\/strong>
A) Low surface tension
B) High viscosity
C) High surface tension
D) Density
Answer:<\/strong> A) Low surface tension<\/p>\n\n\n\n

99. Surface tension helps in<\/mark><\/strong>
A) Movement of water in plants
B) Formation of drops
C) Capillary action
D) All of these
Answer:<\/strong> D) All of these<\/p>\n\n\n\n

100. The phenomenon of surface tension disappears when<\/mark><\/strong>
A) The liquid boils
B) The liquid solidifies
C) Temperature reaches critical point
D) Pressure increases
Answer:<\/strong> C) Temperature reaches critical point<\/p>\n","protected":false},"excerpt":{"rendered":"

1. Surface tension is caused byA) Cohesive forcesB) Adhesive forcesC) FrictionD) GravityAnswer: A) Cohesive forcesExplanation: Molecules at the surface experience an inward pull due to cohesive forces, creating surface tension. 2. Surface tension actsA) Tangentially to the surfaceB) Perpendicular to the surfaceC) Vertically upwardD) RandomlyAnswer: A) Tangentially to the surfaceExplanation: The force acts along the<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-17597","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-blog"},"_links":{"self":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/17597","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/comments?post=17597"}],"version-history":[{"count":2,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/17597\/revisions"}],"predecessor-version":[{"id":17636,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/17597\/revisions\/17636"}],"wp:attachment":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/media?parent=17597"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/categories?post=17597"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/tags?post=17597"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}