Ncert Exercises & Solutions

Given below are two statements:

Assertion (A):	Sodium chloride is added to precipitate soap after saponification.
Reason (R):	Hydrolysis of esters of long-chain fatty acids by alkali produces Soap in colloidal form.

1.	Assertion and reason both are correct statements but reason does not explain assertion.
2.	Assertion and reason both are correct and reason explains the assertion.
3.	Both assertion and reason are wrong statements.
4.	Assertion is the correct statement reason is the wrong statement.

Hint: Soaps are chemically classified as salts of fatty acids

Soaps are chemically classified as salts of fatty acids. fat (i.e., glyceryl ester of fatty acid) reacts with an aqueous sodium hydroxide solution and formed soap. This reaction is known as saponification.

Sodium chloride is added to precipitate soap after saponification because hydrolysis of esters of long-chain fatty acids by alkali produces soap in colloidal form.

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