Question

fresh milk has a pH of 6 when it change into curd it will its pH become decrease or increase, why?

Answer 1

when milk is converted to curd it forms lactic acid hence milk has higher pH than curd

Answer 2

Answer:

The pH scale is used to measure the acidity of a substance. The pH of milk is 6 while that of curd is of the range 4.5 - 5.5. The pH decreases as milk changes into curd. This is because of the formation of lactic acid which as the name suggests is acidic in nature.