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Chemistry Question on food preservatives

Pasteurization is :

A

heating of liquid at 65∘C65^{\circ} C

B

heating of liquid between65∘C65^{\circ} C to 80∘C80^{\circ} C followed by rapid cooling

C

heating of solid at 65∘C65^{\circ} C

D

none of the above

Answer

heating of liquid at 65∘C65^{\circ} C

Explanation

Solution

Pasteurization is the method of partial sterilization. In older method of milk pasteurization, milk is heated to 63−65∘C63-65^{\circ} C for 3030 minutes and in HTST or flash pateurization method, milk is heated to 72∘C72^{\circ} C for at least 1515 seconds followed by rapid cooling.