Question

Is souring of milk a physical change or a chemical change ? Why ?​

Answer 1

So chemical changes require a change on a molecular level that cannot be reversed because they form some new substance. Souring milk is not something you can reverse, and the process of it souring produces new molecules

Answer 2

Explanation:

yes souring of milk is a chemical change because the normal milk cannot be reversed and it is a permanent change and this change is a irreversible change and this change is a taste change