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Q.

Is it true that milk is boiled before storage to kill the microorganism?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
In 1822, Louis Pasteur discovered the process of pasteurisation which prevents milk from spoilage during the storage phase. Pasteurization involves the boiling of milk at 72 °C, for 15 seconds. Fresh milk has to be boiled so that all the microorganisms are killed and it becomes safe to drink and store. The boiling of milk is a physical change as no new substance is formed and chemical properties of  ilk are not altered.
 
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