Question

name some substances which are used as preservatives

Answer 1

In the category of natural food preservatives comes the salt, sugar, alcohol, vinegar etc. These are the traditional preservatives in food that are also used at home while making pickles, jams and juices etc. Also the freezing, boiling, smoking, salting are considered to be the natural ways of preserving food. Coffee powder and soup are dehydrated and freeze-dried for preservation. In this section the citrus food preservatives like citrus acid and ascorbic acid work on enzymes and disrupt their metabolism leading to the preservation.

Answer 2

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There are three classes of chemical preservatives commonly used in foods:

• Benzoates (such as sodium benzoate)

• Nitrites (such as sodium nitrite)

• Sulphites (such as sulphur dioxide).

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