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प्रश्न
What is a soap?
उत्तर
A soap can be defined as a sodium or potassium salt of higher fatty acids such as oleic acid (C17H33COOH), stearic acid (C17H35COOH), palmitic acid (C15H31COOH), etc.
संबंधित प्रश्न
A student requires hard water for an experiment in his laboratory which is not available in the neighbouring area. In the laboratory there are some salts, which when dissolved in distilled water can convert it into hard water. Select from the following groups of salts, a group, each salt of which when dissolved in distilled water will make it hard.
(A) Sodium chloride, Potassium chloride
(B) Sodium sulphate, Potassium sulphate
(C) Sodium sulphate, Calcium sulphate
(D) Calcium sulphate, Calcium chloride
Fill in the following blank with suitable word:
............. is better than soap for washing clothes when the water is hard.
What is saponification? Write the chemical equation of the reaction involved in this process. Name all the substances which take part in this process and also those which are formed.
Describe the structure of a soap molecule with the help of a diagram.
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 is the difference between the chemical composition of soaps and detergents? State in brief the action of soaps in removing an oily spot from a shirt. Why are sops not considered suitable for washing where water is hard?
Soap is a salt of ______ and sodium hydroxide.
Soaps were originally made from ______.
Water, coconut oil, and _______ are necessary for soap preparation.
______ molecules go and join with dirt and oil in the cloth.
