What is the effect of impurities present in the liquid on the surface – InterviewSolution

1.	What is the effect of impurities present in the liquid on the surface tension?
Answer» Impurities affect surface tension appreciably. It is observed that the impurities which lead to concentrate on the surface of the liquid as compared to the bulk, lower the surface tension. Substances like alcohols, soaps, detergents, etc. lower the surface tension of water. Inorganic impurities, e.g. NaCl etc. tend to increase the surface tension of water.

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