In most liquids, with rise in temperature surface tension of liquid (a) decreases (b) increases (c) remains unchanged (d) first decreases and then increases

Answer: (a). On heating, molecules gain kinetic energy and intermolecular (cohesive) forces weaken. Weaker cohesion means lower surface tension; it becomes zero at the critical temperature. So the answer is (a) decreases.

In most liquids, with rise in temperature surface tension of liquid | MHT CET 2026 (19 Apr, Shift 2)

Q1MHT CET 2026 · 19 APR · SHIFT 2Easy

Molecular Theory & Factors

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

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Answer: (a)

On heating, molecules gain kinetic energy and intermolecular (cohesive) forces weaken.
Weaker cohesion means lower surface tension; it becomes zero at the critical temperature.
So the answer is (a) decreases.

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