The solid piece of freshner that is kept in the bathroom, disappears after a few days. The change which is involved in the process is

Options

A. Freezing
B. Evaporation
C. Melting
D. Sublimation

Answer

To solve the question regarding the solid piece of freshener that disappears after a few days, we need to identify the type of change that occurs in this process. Here’s a step-by-step breakdown of the reasoning:

### Step-by-Step Solution:

1. **Identify the Initial State**:
- The freshener is initially in a solid state.

2. **Observe the Change**:
- Over a few days, the solid freshener disappears completely.

3. **Consider the Options**:
- We have four options to consider: freezing, evaporation, melting, and sublimation.

4. **Evaluate Freezing**:
- Freezing is the process where a liquid turns into a solid. Since our freshener is already a solid and is disappearing, freezing cannot be the process involved.
- **Conclusion**: Freezing is not the correct answer.

5. **Evaluate Evaporation**:
- Evaporation is the process where a liquid turns into a gas. Since the freshener is not in a liquid state, this option does not apply.
- **Conclusion**: Evaporation is not the correct answer.

6. **Evaluate Melting**:
- Melting is the process where a solid turns into a liquid. If the freshener were melting, we would expect to see liquid residue. Since it disappears without leaving any liquid, melting is also not the process involved.
- **Conclusion**: Melting is not the correct answer.

7. **Evaluate Sublimation**:
- Sublimation is the process where a solid turns directly into a gas without passing through the liquid state. This means that the solid freshener can disappear without leaving any liquid behind, which matches our observation.
- **Conclusion**: Sublimation is the correct answer.

8. **Final Answer**:
- The change involved in the process is sublimation.