Soap and detergents show cleansing action because of the presence of certain molecules.
Correct answer: B. Polar part
- A. Opposite poles
- B. Polar part
- C. Non-polar part
- D. Positive end
Explanation
The cleansing action of both soaps and detergents results from their ability to lower the surface tension of water, to emulsify oil or grease, and to hold them in suspension in water; however, the cleansing ability is due to the polar part of the groups.
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About Properties of Liquids
Liquid behavior depends on intermolecular forces, which produce surface tension, viscosity, capillary action and a definite volume without a fixed shape. The topic also covers vapor pressure, evaporation, boiling point and the effect of temperature and external pressure, while distinguishing evaporation at the surface from boiling throughout the liquid.
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