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प्रश्न
Describe the structure of a soap molecule with the help of a diagram.
उत्तर
A molecule of soap has a tadpole like structure and is made up of two parts, a long hydrocarbon part and a short ionic part. The hydrocarbon part of the soap molecule is soluble in grease and oil but remains insoluble in water (hydrophobic), whereas the short ionic group is soluble in water (hydrophilic) because of the polar nature of the water molecules.
The structure of a soap molecule is as follows:
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संबंधित प्रश्न
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
What change will you observe if you test soap with litmus paper (red and blue)?
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
How is soap made? Write a word equation involved in soap making.
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?
Distinguish between esterification and saponification reactions of organic compounds.
What is the difference between soaps and detergents? State, in brief, the cleansing action of soaps in removing an oily spot from a fabric. Why are soaps not very effective when a fabric is washed in hard water? How is this problem resolved?
TFM in soaps represents ______ content in soap.
In the soap micelles
