Question

can milk turn to curd when it is placed in refrigerator and why??​

Answer 1

The chilled milk will remain in original condition for a long time until ìits temperature remains low because fermentation process stops in low temperature and goes well in warm conditions. Fermentation will start when chilled milk melts and it will change into buttermilk or curd.

Answer 2

Pasteurized milk is heated to a temperature of 30-400C, or even at room temperature or refrigerator temperature, and a small amount of old curd or whey added to it, the lactobacillus in that curd or whey sample starts to grow. These convert the lactose into lactic acid, which imparts the sour taste to curd.