NEET Physics Surface Tension MCQ Question
Which of the following statements about surface tension are correct?
Molecules at the surface of a liquid have higher potential energy than those in the interior.
Surface tension is responsible for the shape of a liquid droplet.
The pressure difference at the surface of a curved liquid interface can be expressed as (P_i - P_o) = 2S/r.
Surface tension acts equally on all sides of a liquid molecule at the surface.
Correct Answer
Detailed Explanation
Molecules at the surface experience different forces compared to those in the bulk, leading to higher potential energy. The pressure difference due to surface tension only applies to curved interfaces, not flat surfaces. Surface tension does not act equally on all sides, as it creates a net inward force on the surface molecules.
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