Question

Describe about five methods of preservation of food.​

Answer 1

Answer:

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Explanation:

1.DRYING - This method reduces water content sufficiently and prevents bacterial growth

2.PASTEURISATION - pasteurisation is pressurised heating for a short time.pasteurised milk needs to be stored under refrigerators

3.VACUUM PACKING - Vacuum packing stores food in vacuum environment,usually an air tight bag or bottle.

4.FREEZING - When foods kept at below FREEZING temperature ,most chemical changes takes place at such a reduced rate that only minor changes are noticeable even after long periods of storage .

* Microorganisms are generally more resistant to cold than to heat

5.CANNING - It involves cooking food and sealing it in sterile cans or jars ,this is followed by boiling the the container to kill the bacteria

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Answer 2

Explanation:

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