(a) Define surface tension (b) State two methods by which the surface tension of a liquid can be reduced
Question 1 Report
(a) Define surface tension
(b) State two methods by which the surface tension of a liquid can be reduced
Answer Details
(a) Surface tension. Surface tension is the property of the free surface of a liquid by which it behaves like a stretched elastic membrane (skin) and tends to contract so as to occupy the smallest possible surface area. It arises because the molecules at the surface experience a net inward cohesive pull from the molecules below them.
(b) Methods of reducing the surface tension of a liquid:
- Raising the temperature of the liquid.
- Adding an impurity such as soap or detergent to the liquid.
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