what are preservatives?
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A preservative is a substance or a chemical that is added to products such as food products, 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:
Salts are edible oils are the common chemicals generally used to check the growth of microorganisms therefore they are called preservatives .
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