Exams › SSC CGL (Prelims) › General

The surface tension of a liquid:

1. Is a force per unit area, independent of temperature
2. Is a vector quantity, increasing with temperature
3. Is a scalar quantity, generally decreasing as temperature increases
4. Is a dimensionless constant for all fluids

Correct answer: Is a scalar quantity, generally decreasing as temperature increases

Solution

Surface tension is a scalar property of a liquid. It generally decreases as temperature increases because molecular cohesion becomes weaker at higher temperatures.

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