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प्रश्न
The sodium salt of a long chain fatty acid is called ______.
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उत्तर
The sodium salt of a long chain fatty acid is called soap.
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संबंधित प्रश्न
Describe in brief the cleansing action of soap.
List two problems that arise due to the use of detergents instead of soaps.
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
In the neighbourhood of your school, hard water required for an experiment is not available. Select from the following group of salts available in your school, a group each member of which, if dissolved in distilled water, will make it hard:
(a) Sodium chloride, calcium chloride
(b) Potassium chloride, sodium chloride
(c) Sodium chloride, magnesium chloride
(d) Calcium chloride, magnesium chloride
Would you be able to check if water is hard by using a detergent?
What is a detergent?
Give any two differences between soaps and detergents.
What is a soap?
Describe the structure of a soap molecule with the help of a diagram.
A student is testing water to know which is best for cleansing purposes with soaps. He would find that the cleansing action of soaps is best when he uses water obtained from
(a) rain
(b) tap
(c) hand pump
(d) pond
A student takes 4 mL of distilled water in each of four test tubes I, II, III and IV, and then dissolves an equal amount of four different salts namely NaCl in I, CaCl2 in II, MgCl2 in III and KCl in IV. He then adds 8 drops of the given soap solution to each test tube and shakes the contents of the test tube 10 times. In which test tubes will enough lather (foam) be formed ?
(A) I and II
(B) II and III
(C) I and IV
(D) III and IV
What are detergents chemically? List two merits and two demerits of using detergents for cleansing. State the reason for the suitability of detergents for washing, event in the case of water having calcium and magnesium ions.
What is a soap?
Why are soaps not suitable for washing clothes when the water is hard?
What are the differences between Soap and synthetic detergent?
Explain why soap cannot be used in hard water.
Water, coconut oil, and _______ are necessary for soap preparation.
Why do soaps not work effectively in hard water?
