MHT CET 2026 Physics question

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

(A)decreasesCorrect
(B)increases
(C)remains unchanged
(D)first decreases and then increases

Answer: (A)

Solution

With a rise in temperature the average kinetic energy of the molecules increases and the intermolecular cohesive forces become relatively weaker, so the net inward pull on surface molecules decreases. Hence the surface tension of most liquids

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Question ID VK-100818