How is radiation effective in food preservation?

Answer in Brief

This is a new technique of preservation, which is at the stage of experimentation.
The W.H.O. has advised the use of this process only in the case of wheat, onions, and potatoes.
In this process, gamma rays or high-speed electrons are used to destroy micro-organisms.
These radiations are termed ionising radiations.
The advantage of using this process is that the food can be stored even without refrigeration.

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Household Methods of Preservation of Food

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Chapter 9: Storage and Preservation of Food - EXERCISES [Page 122]

Chapter 9 Storage and Preservation of Food
EXERCISES | Q 17. | Page 122

Shelf life means ______

Name two important chemical preservatives permitted and popularly used in the preservation industry.

Enumerate any five uses of preserving food at home.

Assertion (A): Evaporating moisture from food stuff prevents growth of microorganisms.

Reason (R): Most microorganisms cannot grow without water.

Assertion [A]: Green leafy vegetables kept in the refrigerator go limp and soggy.

Reason [R]: All green leafy vegetables are rich in high content of water.

Action of food enzymes '.are the major causes of ______.

Mention two precautions to be taken while refrigerating food at home.

Name two important cherical preservatives used for food preservation.

State the principle behind pickling as a method of preservation.

Explain the procedure for preserving foods by the method of dehydration.