Question

in short
1.explain the various methods of that can be used for food preservation?​

Answer 1

Answer:

There are various methods of food preservation

1. We can keep our food in air tight containers.

2.If the food item (eg. milk) can't stay fresh outside it should be kept in a refrigerator

3. One more method of food preservation is that we can make pickles out of vegetables by adding salt /vinegar/oils.

Answer 2

$\sf\Huge{\mathfrak{\red{Answer-}}}$

Important methods used for preserving food are:

✏️Chemical Method:

Salts and edible oils are the common chemicals generally used to check the growth of microorganisms. Therefore, they are called preservatives. We add salt or acids as preservatives to pickles to prevent the attack of microbes. Sodium benzoate and sodium metabisulphite are common preservatives. These are also used in the jams and squashes to check their spoilage.

✏️Preservation by Salt:

Common salt has been used to preserve meat and fish for ages. Meat and fish are covered with dry salt to check the growth of bacteria. Salting is

also used to preserve amla, raw mangoes,

tamarind, etc

✏️Pireservation by Sugar:

Jams, jellies and squashes are preserved by sugar.Sugar reduces the moisture content and inhibits the growth of food spoiling bacteria (mierobes).

✏️Preservation by Oil and Vinegars:

Use of oil and vinegar prevents spoilage of pickles because bacteria cannot live in such an environment, Vegetables, fruits, fish and meat are often preserved by this method.