Question

The milk that comes in tetra packets are not spoiled quickly as compared to the fresh milk. Predict the reason.

Answer 1

Milk sold in packets can be stored for 2 or 3 days as it was packed after the process of pasteurisation.
Pasteurisation is one type of food preservation method. Pasteurisation is the process developed by Louis Pasteur, especially to store milk. In pasteurisation, milk is first heated to about 70 degrees Celsius for 15 to 30 seconds. Then it is suddenly chilled and stored. This prevents the growth of microbes. Pasteurisation deactivates the microbes and reduces the enzyme activity by reduction of temperature.
The milk does not get spoiled because the milk is pasturized.Pasteurisation is a method of preserving milk. Louis Pasteur discovered the process of pasteurisation. During pasteurisation, milk is first heated to about 70 degrees Celsius for 15 to 30 seconds and then suddenly chilled. Sudden chilling of milk is done to prevent the growth of microbes.