Question

why milk convert into curd at room temperarture

Answer 1

At the point when purified drain is warmed to a temperature of 30-40 °C, or even at room temperature or fridge temperature, and alittle measure of old curd or whey added to it, the lactobacillus in that curd or whey test begins to develop.

Answer 2

because there is a chemical reaction between lactic acid bacteria and casein present in the milk