Microorganisms: Friend and Foe — Science STD 8 — Question
Gujarat BoardEnglish MediumSTD 8ScienceMicroorganisms: Friend and Foe2 Marks
Question
Why does the milk that comes in packets not spoil? What is pasteurisation ?
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Answer
The milk that comes in packets does not spoil because it is a pasteurised milk. It can be consumed without boiling as it is free from harmful microbes. Pasteurisation is a process in which milk is heated to about $70^{\circ} C$ for 15-30 seconds and then suddenly chilled and stored. This prevents the growth of microbes. This process was discovered by Louis Pasteur.
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