Question:
Pasteurization is :
Pasteurization is :
Updated On: Jul 28, 2022
- heating of liquid at $65^{\circ} C$
- heating of liquid between$65^{\circ} C$ to $80^{\circ} C$ followed by rapid cooling
- heating of solid at $65^{\circ} C$
- none of the above
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The Correct Option is A
Solution and Explanation
Pasteurization is the method of partial sterilization. In older method of milk pasteurization, milk is heated to $63-65^{\circ} C$ for $30$ minutes and in HTST or flash pateurization method, milk is heated to $72^{\circ} C$ for at least $15$ seconds followed by rapid cooling.
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Concepts Used:
Food Preservatives
Chemical that is added to food and beverages is knowns as food preservative. It helps in preventing decay of food from the attack of microbes.
Food preservatives are of two types:
- Natural preservatives: are the preservatives which are derived from natural sources. For examples: oregano and raspberry extract, vinegar, alcohol, salt, sugar and castor oil, etc.
- Artificial preservatives: chemicals that delay or stop the growth of bacteria in foods, spoilage, and discoloration. For example- Benzoates, sulphates, Propionates, Nitrates, and Sorbates. These artificial preservatives can either be added to the food or sprayed on it.
Read More: Chemical Use in Food Preservatives
Important Points to be Noted:
- It should be remembered to you that artificial preservatives are beneficial to us as they not only help to preserve the food but also enhance its palatability along with protecting the food against oxygen reactive species.