Question

Mention some natural and chemical preservation of food

Answer 1

Some common preservatives and their primary activity

Chemical Affected

Organism(s)

Use in Foods

Sulfites

Insects & Microorganisms

Dried Fruits, Wine, Juice

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Sodium Nitrite

Clostridia

Cured Meats

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Propionic Acid

Molds

Bread, Cakes, Cheeses

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Sorbic Acid

Molds

Cheeses, Cakes, Salad Dressing

Answer 2

Answer:

Some chemical preservations of food are :

1) Benzoates ( such as sodium benzoates)

2) Nitrites ( such as sodium nitrite)

3) Sulphite ( such as sulphur dioxide)

and natural are :

1) Pasteurization ( such as boiling )

2) Using vinegar in food

3) Freezing ( freezing keeps the food fresh for some days )

Explanation:

hope it helps you