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प्रश्न
How soap is prepared?
उत्तर
Soaps are formed by heating fat or oil (i.e. glyceryl esters of fatty acids) with aqueous sodium hydroxide solution. This reaction is called saponification.
During the process of hydrolysis esters of fatty acids are hydrolyzed and the soap is obtained in the colloidal form. It floats in solution as curd. It is precipited from the solution by adding sodium chloride.
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संबंधित प्रश्न
Explain cationic detergents.
Why is bithional added to soap?
What is a soap ?
Write the chemical equation for preparing sodium soap from Glyceryl palmitate . Structural formulae of the compounds are given below.
(C15H31COO)3C3H5 – Glyceryl palmitate
Write the chemical equation for preparing sodium soap from glyceryl oleate . Structural formulae of the compounds are given below.
(C17H32COO)3C3H5 – Glyceryl oleate
Following type of nom-ionic detergents are present in liquid detergents, emulsifying agents and wetting agents. Label the hydrophilic and hydrophobic parts in the molecule. Identify the functional group (s) present in the molecule.
Explain the mechanism of cleansing action of soaps.
Write balanced chemical equations for the action of methyl bromide on silver propanoate
Which of the following enhances leathering property of soap?
Glycerol is added to soap. It functions ______.
What is a soft soap?
If soap has high alkali content it irritates skin. How can the amount of excess alkali be determined? What can be the source of excess alkali?
Why is it safer to use soap from the environmental point of view?
What is the side product of soap industry? Give reactions showing soap formation.
How are transparent soaps manufactured?
What are fillers and what role these fillers play in soap?
Assertion: Transparent soaps are made by dissolving soaps in ethanol.
Reason: Ethanol makes things invisible.
Assertion: Sodium chloride is added to precipitate soap after saponification.
Reason: Hydrolysis of esters of long-chain fatty acids by alkali produces soap in colloidal form.
