Question

Why does curd set and turn sour faster in summer than in winter

Answer 1

Curd set faster in hot summer than in cold winter because the Lactobacillus bacteria need warmth to turn the milk into curd.
So in summer, the temperature is hot which helps the bacteria to multiply faster which helps them to change the milk into curd faster, but in winter the temperature is not warm and favorable and hence the conversion process is slow.