Question

Write the names of two preservatives used in fruit preservation.

Hint:

Remember: Potassium metabisulphite = used in light-colored juices, Sodium benzoate = used in dark-colored products.

Answer 1

Step 1: Understand fruit preservation.
Fruits are perishable commodities and need preservation to prevent microbial spoilage and enzymatic deterioration. Preservatives are added to increase shelf life.
Step 2: Examples of preservatives.
1. Potassium metabisulphite (K$_2$S$_2$O$_5$) – releases sulphur dioxide (SO$_2$) which inhibits microbial growth. Widely used in squashes, juices, and wines.
2. Sodium benzoate (C$_6$H$_5$COONa) – prevents the growth of yeast and bacteria, commonly used in jams, jellies, fruit juices.
Step 3: Conclusion.
Thus, two important preservatives used are Potassium metabisulphite and Sodium benzoate.