Introduction:
The melting of wax can be categorized as a physical change rather than a chemical change. Physical changes are alterations that do not result in the formation of new substances with different chemical compositions.

Physical Change:
The melting of wax is a physical change because it only involves a change in the physical state of the substance. The wax undergoes a phase transition from a solid to a liquid state without any alteration in its chemical composition.

Explanation:
When heat is applied to solid wax, the energy causes the wax molecules to vibrate faster and overcome the intermolecular forces holding them in a solid state. As a result, the wax transitions from a solid state to a liquid state.

During the process of melting, the wax molecules retain their chemical identity and composition. The molecular structure of the wax remains the same, consisting of long hydrocarbon chains. The only difference is that in the liquid state, these chains are able to move more freely due to the increased energy.

Physical Properties:
The physical properties of the wax, such as its color, density, and odor, remain unchanged during the process of melting. These properties are inherent to the substance and are not altered by the phase transition from solid to liquid.

Reversible Process:
Another characteristic of a physical change is that it is usually reversible. In the case of wax, if the liquid wax is allowed to cool down, it will solidify and revert to its original solid state. This indicates that the change is purely physical and does not involve any chemical reactions.

Conclusion:
In conclusion, the melting of wax is considered a physical change because it involves a phase transition from a solid to a liquid state without any alteration in the wax's chemical composition. The physical properties of the wax remain unchanged, and the process is reversible.

no it's only physical change bcz no new substance is formed and it's reversible...