The value of surface tension of a liquid at c | vedclass

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(A) Surface tension is a property arising from the cohesive forces between molecules at the surface of a liquid.As the temperature of a liquid increas

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Zero

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(A) Surface tension is a property arising from the cohesive forces between molecules at the surface of a liquid.As the temperature of a liquid increases,the kinetic energy of the molecules increases,which weakens the cohesive forces.At the critical temperature,the distinction between the liquid phase and the vapor phase disappears,and the density of the liquid becomes equal to the density of the vapor.Consequently,the cohesive forces become negligible,and the surface tension of the liquid drops to $0$.

The value of surface tension of a liquid at critical temperature is

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