NDA General Ability Question (2025) — Solution

Step-by-step solution

Surface tension is the property of a liquid that arises due to intermolecular forces of attraction between its molecules. When the temperature of a liquid increases, the kinetic energy of its molecules also increases. This increased kinetic energy helps to overcome the intermolecular forces of attraction, leading to a decrease in the cohesive forces between the molecules. Consequently, the surface tension of the liquid decreases with an increase in temperature. At the critical temperature, the surface tension becomes zero. Answer: It decreases when temperature increases