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प्रश्न
What is meant by ‘surface activity’?
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उत्तर
The surface activity of a substance is the property by virtue of which it can spread on a surface. For example, soapy water easily spreads on any kind of surface and thus is used for cleaning purposes.
संबंधित प्रश्न
While preparing soap a small quantity of common salt is generally added to the reaction mixture of vegetable oil and sodium hydroxide. Which one of the following may be the purpose of adding common salt?
(A) To reduce the basic nature of the soap
(B) To make the soap neutral
(C) To enhance the cleansing power of the soap
(D) To favour the precipitation of the soap
Why is common salt (sodium chloride) added during the preparation of soap?
What is a soap? Name one soap.
The chemical mostly used in the preparation of most of the soaps we use is
(a) Sodium chloride
(b) Potassium hydroxide
(c) Sodium hydroxide
(a) Potassium chloride
What are the differences between Bath soap and soap for washing clothes?
Explain why soap cannot be used in hard water.
TFM in soaps represents ______ content in soap.
Soaps are ester of which type of acids?
Analogy:
Used to join components: Adhesives:: Clean the body ______.
Why do soaps not work effectively in hard water?
