Definition:
"Those chemicals which are used to prevent food spoilage are called preservatives"
Explanation:
Food spoiling may be due to microbial actions or chemical reactions.
Uses:
(i) Preservatives serve as anti-microbials or antioxidants.
(ii) Manufacturers add preservatives to prevent spoilage during transportation and storage of foods for a period of time.
(iii) Natural food preservatives efficiently control the growth of bacteria in food.They are used to preserve meat and fish .Natural preservatives include salts, sugar, alcohol, vinegar.