Question

molten wax is soft but it becomes hard on cooling say whether it is physical or chemical change

Answer 1

Changes of state such as melting or boiling are physical changes and are generally easy to reverse though the end product may not always look exactly the same as the starting material.

In chemical changes new substances are formed and the process is often difficult to reverse.

Melted wax solidifies when cooled but unless it is shaped or moulded it will not be the same shape as at the start.

Answer 2

It is a physical change.