Question : Pasteurisation of milk means--
Option 1: Heating of milk to above 720C
Option 2: Heating of milk to above 620C
Option 3: Cooling of milk to about 620C
Option 4: Cooling of milk to about 100C
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Correct Answer: Heating of milk to above 620C
Solution : The correct option is heating of milk to above 620C.
Pasteurisation involves heating milk to temperatures above 62°C (about 143.6°F), a method known as "high-temperature short-time" (HTST) pasteurisation. Milk is rapidly heated to a temperature exceeding 62°C for a short period of time (typically approximately 15 seconds) and then immediately cooled. This method makes milk safer to consume by lowering the possibility of bacterial contamination, prolonging shelf life, and preserving flavour and important nutrients.
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Question : 0 K is equivalent to
Option 1: 273oC
Option 2: -273oC
Option 3: 0oC
Option 4: 100oC
Question : a3 + b3 + c3 = 3abc if _________.
Option 1: a = b = c
Option 2: a + b + c = 0
Option 3: a + b + c = 1
Option 4: a + b + c = –1
Question : If a + b + c = 0, the value of (a3 + b3 + c3) is:
Option 1: abc
Option 2: 2abc
Option 3: 3abc
Option 4: 0
Question : The temperature of a liquid is 32oF. What is its temperature on the Celsius scale?
Option 1: 32oC
Option 2: 0oC
Option 3: 100oC
Option 4: 212oC
Question : If 2a + 3b = 10 and ab = 3, then find the value of 4a2 + 9b2.
Option 1: 60
Option 2: 62
Option 3: 64
Option 4: 68
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