मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

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. - Chemistry

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प्रश्न

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.

पर्याय

  • Assertion and reason both are correct statement but reason does not explain assertion.

  • Assertion and reason both are correct and reason explains the assertion.

  • Both assertion and reason are wrong statement.

  • Assertion is correct statement reason is wrong statement.

  • Assertion is wrong statement reason is correct statement.

MCQ
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उत्तर

Assertion and reason both are correct and reason explains the assertion.

Explanation:

Hydrolysis of esters of long-chain fatty acids by alkali gives soap a colloid. The process is called saponification. Sodium chloride is added to precipitate soap which is in colloidal form.

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 16: Chemistry In Everyday Life - Multiple Choice Questions (Type - I) [पृष्ठ २३८]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
पाठ 16 Chemistry In Everyday Life
Multiple Choice Questions (Type - I) | Q 90 | पृष्ठ २३८

संबंधित प्रश्‍न

Why is bithional added to soap?


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 hydrogen bromide on styrene in the presence of a peroxide


Write balanced chemical equations for the action of methyl bromide on silver propanoate


How soap is prepared?


Which of the following enhances leathering property of soap?


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.


What is the difference between bathing soap and washing soaps?


Match the detergents given in Column I with their uses given in Column II.

Column I Column II
(i)  (a) Dishwashing powder
(ii)  (b) Laundry soap
(iii) \[\ce{C17H33CO\overset{-}{O}\overset{+}{N}a + Na2CO3 + Rosin}\] (c) Hair conditioners
(iv) \[\ce{CH3(CH2)16COO(CH2CH2O)nCH2CH2OH}\] (d) Toothpaste

Assertion: Transparent soaps are made by dissolving soaps in ethanol.

Reason: Ethanol makes things invisible.


Which of the following is not a correct statement?


Green chemistry in day-to-day life is in the use of ______.


Self-cleansing windows are example of the ______.


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