Question

Name one chemical that is used to kill food spoiling microorganism.
Sodium metabisulphite
Potassium permanganate​

Answer 1

Fruit puree can be preserved by adding 600ppm sulphur dioxide (SO2) and sealing in drums.

The semi-processed fruit can be stored for several months. Most of the SO2 that is absorbed

during storage is lost during drying, but it is recommended that the puree is boiled before

drying to reduce the levels of residual SO2.

Preservative

Sorbic acid. Sorbic acid and sodium and potassium sorbate are used t

Answer 2

Answer:

Chemical food preservatives are widely used in the food industry and are invariably cheap ingredients that are effective against a wide range of spoilage organisms. Chemical food preservatives include compounds such as sodium benzoate, benzoic acid, nitrites, sulfites, sodium sorbate and potassium sorbate.