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प्रश्न
Distinguish between esterification and saponification reactions of organic compounds.
उत्तर
Esterification reaction is the reaction between carboxylic acids and alcohols. In such reactions, esters get formed. Esters are sweet-smelling organic compounds with the general formula RCOOR. The general reaction for esterification reaction is:
Alcohol and carboxylic acid can be re-obtained from an ester by treating it with an acid or a base. This reaction is used in the preparation of soaps and is known as saponification reaction.
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संबंधित प्रश्न
A student took four test tubes P, Q, R and S and filled about 8 mL of distilled water in each. After that he dissolved an equal amount of Na2SO4 in P, K2SO4 in Q, CaSO4 in R and MgSO4 in S. On adding an equal amount of soap solution and shaking each test tube well, a good amount of lather will be obtained in the test tubes:
(a) P and Q
(b) P and R
(c) P, Q and S
(d) Q, R and S
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
Why is common salt (sodium chloride) added during the preparation of soap?
Why have detergents replaced soap as a washing agent?
The soap molecule has a ______.
Which one of the following sets of materials can be used to prepare soap?
(A) Neem oil and calcium hydroxide
(B) Castor oil and sodium hydroxide
(C) Mineral oil and sodium hydroxide
(D) Neem oil and magnesium hydroxide
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
Differentiate between:
Detergents and Soaps.
Explain why synthetic detergents are superior to soap.
Analogy:
Used to join components: Adhesives:: Clean the body ______.
