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प्रश्न
Distinguish between esterification and saponification reactions of organic compounds.
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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
Describe in brief the cleansing action of soap.
List two problems that arise due to the use of detergents instead of soaps.
In a locality, hard water, required for an experiment, is not available. However, the following salts are available in the school laboratory:
1. Sodium sulphate
2. Calcium sulphate
3. Magnesium chloride
4. Sodium chloride
5. Calcium chloride
6. Potassium sulphate
Which of the above salts may be dissolved in water to obtain hard water for the experiment?
(A) 2, 3 and 5
(B) 1, 2 and 5
(C) 1, 2, 4 and 6
(D) 3 and 5 only
While studying the saponification reaction, what do you observe when you mix an equal amount of colourless vegetable oil and 20% aqueous solution of NaOH in a beaker?
(A) The colour of the mixture has become dark brown
(B) A brisk effervescence is taking place in the beaker
(C) The outer surface of the beaker has become hot
(D) The outer surface of the beaker has become cold
Explain the cleansing action of soap. Draw diagrams to illustrate your answer.
Give the reason of formation of scum when soaps are used with hard water.
The saponification of a fat or oil is done using _____ solution for hot process.
Arrange the following statements in correct sequence
- Pour that solution into an empty matchbox, soap can be obtained after drying.
- Take the necessary quantity of water in a jar.
- Then add coconut oil drop by drop and stir it well.
- Add concentrated sodium hydroxide in the jar and allow it to cool.
- Try this soap to wash your hand kerchief.
- Cover your work area with old newspaper.
What are the two different types of molecules found in the soap?
In the soap micelles
