Question

In the preparation of soap, sodium chloride causes:
(a) complete saponification.
(b) complete hydrolysis.
(c) complete neutralization.
(d) complete precipitation.

Answer 1

NaCl is used to precipitate out all the soap from from solution because NaCl reduces the solubility of soap which causes its precipitation.
Option D
Complete precipitation is answer

Answer 2

In the 'preparation of soap', 'sodium chloride' causes complete precipitation.  

Option (d)

Explanation:

• The soap is formed by the precipitation by the 'common salt or NaCl'. When the 'common salt is added' in the aqueous solution then the reaction occurs and the soap is precipitate out from the solution.
• When the soap added to the solution then the solubility of the soap became decreased and the soap precipitates out from the solution as a solid form of the soap.

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