Can chemical changes be reversed by physical changes?
Also asked, can a physical change reverse a chemical change explain your answer?
A physical change can't reverse a chemical change. This is because a chemical change results in a new substance being formed. Chemical bonds are broken and and new bonds are formed between different atoms. Some examples of physical changes are melting, freezing, vaporization, and condensation.
Similarly one may ask, why can't you reverse a chemical change?
Because chemical changes produce new substances, they often cannot be undone. For example, you can't change ashes from burning logs back into wood. Some chemical changes can be reversed, but only by other chemical changes.
All changes in the world are one of the two types – Reversible changes and irreversible changes. A change which can happen backward, that is, can be reversed is called a reversible change. If you keep water in the freezer for some time, it transforms into ice.