Which one of the following substances is used in the preservation of foodstuff?

Correct answer: (c) Sodium benzoate

Explanation

Sodium benzoate (C₆H₅COONa) is a common food preservative: it stops the growth of moulds, yeasts and bacteria in acidic foods such as pickles, jams, sauces and soft drinks.

Common salt also preserves food, by drawing out water, but among the options the chemical preservative meant is sodium benzoate.