In most liquids, with rise in temperature, surface tension of a liquid
In most liquids, with rise in temperature, surface tension of a liquid
first decreases and then increases.
increases.
decreases.
remains unchanged.
Solution
The magnitude of the surface tension of a liquid depends on the attractive forces between the molecules. When the attractive forces are large, the surface tension is large. An increase in temperature increases the kinetic energy of the molecules, and the effectiveness of intermolecular attraction decreases. So the surface tension decreases as the temperature is raised.