Melting of wax is a ________.

Options

A. chemical change
B. decomposition reaction
C. both physical and chemical change
D. physical change

Explanation

To determine whether the melting of wax is a physical or chemical change, we can analyze the process step by step.

### Step-by-Step Solution:

1. **Understanding the State of Wax**:
- Wax is initially in a solid state.

**Hint**: Identify the initial state of the substance involved in the change.

2. **Heating the Wax**:
- When heat is applied to the solid wax, it begins to melt and transforms into a liquid form.

**Hint**: Consider what happens to the substance when energy (heat) is added.

3. **Reversible Process**:
- The melting of wax is a reversible process. If we cool the liquid wax, it will solidify back into its original solid form.

**Hint**: Think about whether the change can be reversed or not.

4. **Composition of Wax**:
- Throughout the melting process, the chemical composition of the wax remains unchanged. It is still wax, just in a different physical state (solid vs. liquid).

**Hint**: Determine if the chemical identity of the substance is altered during the process.

5. **Conclusion**:
- Since the melting of wax involves a change in physical state without altering its chemical composition, it is classified as a physical change.

**Final Answer**: Melting of wax is a **physical change**.