Sodium salts of some acids are very useful as food preservatives. Suggest a few such acids ?

Explanation

A preservative is naturally occuring or sunthetically produced substance that is added to food to prevent decomposition by microbial growth or by undesirable chemical changes.
Sodium salts of same acids are very useful as food preservatives. Some example of such acid are as follows
(i) Benzoic acid in the form of its sodium salt, constitues one of the most common food preservative, Sodium benzoats is a common preservative in acid or acidified foods such as fruit, juices, pickles etc.Yeasts are inhibited by benzoate to a greater extent than are moulds and bacteria.
(ii) Sorbic acid and its salts (sodium, potassium and calcium) also have presservative acitivities bu the applications of sodium sorbate `C_(6)H_(7)NaO_(2)` are limited compared to that for potassium drinks.
(iii) Sodium erythorbate `C_(6)H_(7)NaO_(6)` is a food additive used predominate iin meats, popultry and soft drinks
(iv) Sodium propanoate `Na(C_(2)H_(5)COO)` is used in bakery products as mold inhibitor.