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
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Explanation:
The surface tension of a liquid results from an imbalance of intermolecular attractive forces, the cohesive forces between molecules: A molecule in the bulk liquid experiences cohesive forces with other molecules in all directions. A molecule at the surface of a liquid experiences only net inward cohesive forces.
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