Class 11 Physics Mechanics Mechanical Properties of Fluids



Surface tension of a liquid is due to:
(a)
gravitational force between molecules
(b)
electrical force between molecules
(c)
adhesive force between molecules
(d)
cohesive force between molecules
Correct answer: (d) 
Solution: Its the cohesive force due to which surface molecules are attracted towards other similar molecules inside the surface, making the surface to behave like a stretched membrane. 

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