Question

what are preservatives ?what is the basic principle of preservation? explain some common preservatives procedures with adequate examples

Answer 1

A preservative is a substance or a chemical that is added to products such as food, beverages, pharmaceutical drugs, paints, biological samples, cosmetics, wood, and many other products to prevent decomposition by microbial growth or by undesirable chemical changes

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Answer 2

preservatives means which we can preserve for long time.
eg :pickels are best preservatives and jams etc