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Question
Free surface of a liquid behaves like a sheet and tends to contract to the smallest possible area due to the
Options:
A .  centrifugal force
B .  force of adhesion
C .  force of friction
D .  force of cohesion
Answer: Option D
Free surface of a liquid behaves like a sheet and tends to contract to the smallest possible area due to the force of cohesion. The force of cohesion is defined as the force of attraction between molecules of the same substance.

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