Uses of Carboxylic Acids and Their Derivatives Questions in English

(N/A) $(i)$ Methanoic acid is used in rubber,textile,dyeing,leather,and electroplating industries.
$(ii)$ Ethanoic acid is used as a solvent and as vinegar in the food industry.
$(iii)$ Hexanedioic acid is used in the manufacture of nylon-$6, 6$.
$(iv)$ Esters of benzoic acid are used in perfumery.
$(v)$ Sodium benzoate is used as a food preservative.
$(vi)$ Higher fatty acids are used for the manufacture of soaps and detergents.

(N/A) Sodium salts of some acids are very useful as food preservatives. Some examples of such acids are as follows:
$(i)$ Benzoic acid: Its sodium salt,sodium benzoate,is a common preservative in acidic or acidified foods such as fruits,juices,and pickles.
$(ii)$ Sorbic acid: Its sodium salt is a food additive used predominantly in meats,poultry,and soft drinks.
$(iii)$ Propanoic acid: Its sodium salt,sodium propanoate $(CH_3CH_2COONa)$,is used in bakery products as a mold inhibitor.