alleryThe free surface of a liquid tends to contract to the smallest possible area due to the:
AForce of adhesion
BForce of cohesion
CForce of friction
DCentrifugal force
Answer & Solution
Correct answer: B. Force of cohesion
1. This tendency is the property of surface tension.
2. Surface tension arises from attraction between like molecules of the liquid.
3. Attraction between like molecules is the force of cohesion.
_Source: RRB Group D (RRC) PYQ, held 27-10-2013, Q.90._
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