Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

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.

• The assertion & reason statement states about 2 different reactions.

• The former (assertion) is precipitation whereas the latter is saponification which is basically heating of glyceryl esters (fatty acids with aqueous NaOH soln –

In this reaction esters of fatty acids are hydrolysed & the soap obtained remains in colloidal form.

• Precipitation of this solution is done by addition of NaCl(sodium chloride) which is a different process.