Question
Write the factors affecting surface tension?
✓
Answer
The surface tension of a liquid is affected by many factors. Some examples are given below :
1. Effect of temperature : On increasing the temperature the surface tension of liquid decreases and at critical temperature the value of surface tension becomes zero.
2. Effect of solute : If the solute is highly soluble then the surface tension of the liquid increases (like salt or sugar in water). If the solute is less soluble (like kerosene oil in water) then the surface tension of the liquid decreases.
3. Effect of contamination : The presence of dust particles and oily substance on the surface of water decreases its surface tension.
1. Effect of temperature : On increasing the temperature the surface tension of liquid decreases and at critical temperature the value of surface tension becomes zero.
2. Effect of solute : If the solute is highly soluble then the surface tension of the liquid increases (like salt or sugar in water). If the solute is less soluble (like kerosene oil in water) then the surface tension of the liquid decreases.
3. Effect of contamination : The presence of dust particles and oily substance on the surface of water decreases its surface tension.
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