Question

State whether the change can be reversed or not.

Souring of milk.

Answer 1

• A change that can be reversed or can get back to its original state is called a reversible change.
• Changes that can not be reversed which are permanent are called irreversible changes.
• The process of souring milk produces new molecules.
• The souring of milk is an irreversible change because it cannot be obtained in its original state.

Hence, the souring of milk cannot be reversed.