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5 July, 10:58

In a liquid, the energy required to increase the surface of the area by a unit amount is called : a. dipole-dipole force. b. viscosity. c. capillary action. d. surface tension. e. hydrogen bonding

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  1. 5 July, 14:41
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    D. Surface tension.

    Explanation:

    Surface tension is defined as the energy required to increase the surface area of a liquid by a unit amount.

    The surface tension of a liquid results from an imbalance of intermolecular attractive forces, the cohesive forces between molecules:

    A molecule in a liquid experiences cohesive forces with other molecules in all directions while molecules at the surface of a liquid experiences only net inward cohesive forces.
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