Q.

Surface tension in a liquid is due to :

A. Adhesive force between molecules
B. Cohesive force between molecules
C. Gravitational force between molecules
D. Electrical force between molecules
Answer» B. Cohesive force between molecules
Explanation: Surface tension is a contractive tendency of the surface of a liquid that allows it to resist an external force. This property is caused by cohesion of similar molecules, and is responsible for many of the behaviors of liquids.
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