Milk becomes sour if kept outside the refrigerator in summers because of:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. the conversion of lactose sugar to lactic acid
- Milk becomes sour if kept outside the refrigerator in summers due to the breakdown of lactose into lactic acid because of the lactic acid bacteria which also lower the PH of the milk due to the formation of lactic acid.