Question

what is the principle involved in the following preservation method of a) salting b) oil c) heat and cold treatment​

Answer 1

Answer:

option c is correct

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Answer 2

Answer:

a) Salting :- It is known that salt binds with water molecules and thus acts as a dehydrating agents in foods . A high level of salinity may also impair the conditions under which pathogens can survive.

b) Oil :- It prevents the growth of micro-organisms, thus preventing spoilage. When pickle is made at home ,oil is poured to cover the mango , lemon, or other vegetables which are being pickled.

c) Heat and cold treatment :- It prevents the growth of micro-organisms , for ex, Milk is heated for a long time and then suddenly chilled. This is done to kill the micro-organisms and preventing their growth in the milk.