JEE Main levelSingle correct optionDifficulty 2 of 3el179
After saponification, sodium chloride is added to the hot reaction mixture. The purpose is to
Aconvert the soap into free fatty acids
Boxidise glycerol to a ketone
Cprecipitate (salt out) the soap, which separates from the aqueous glycerol layer
Dneutralise the excess fat
Answer: C
Soap is much less soluble in concentrated brine, so it separates as a curd on adding common salt. Glycerol remains in the aqueous layer and can be recovered. NaCl does not react with fat or glycerol.