Question

​Fresh milk has pH of 6.When it changes into curd,will its pH value decrease or increase?Why?

Answer 1

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.

Answer 2

the pH of curd is low than milk
the pH of curd is near 4.5 to 5.5 while pH of milk is 6 to 6.5
the bacteria present in milk lactobacillus produce lactic acid in milk and make it curd that's why curd is more acidic