MHT CET 2024 Physics question

In most liquids, with rise in temperature, surface tension of a liquid

(A)first decrease and then increase
(B)increase
(C)decreasesCorrect
(D)remains unchanged

Answer: (C)

Solution

Surface tension arises from cohesive forces between molecules at the surface. As temperature rises, the molecules gain kinetic energy, the average intermolecular attraction effectively weakens, and the surface tension falls almost linearly; it becomes zero at the critical

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Question ID VK-099756