Which of the following materials exhibits sublimation ?

Options

A. Ice
B. Ethyl alcohol
C. Wax
D. Camphor

Answer

To determine which material exhibits sublimation, we need to understand the concept of sublimation and analyze the given options.

### Step-by-Step Solution:

1. **Understanding Sublimation**:
- Sublimation is the process where a solid transitions directly into a gas without passing through the liquid phase. Common examples include substances like dry ice (solid carbon dioxide) and iodine.

2. **Evaluating the Options**:
- **Option A: Ice**
- Ice (solid water) melts into liquid water before it can evaporate into water vapor. Therefore, ice does not exhibit sublimation.
- **Option B: Ethyl Alcohol**
- Ethyl alcohol (ethanol) is a liquid at room temperature. Since it is not a solid, it cannot undergo sublimation.
- **Option C: Wax**
- Wax can be melted into a liquid form when heated. Similar to ice, it does not transition directly from solid to gas, so it does not exhibit sublimation.
- **Option D: Camphor**
- Camphor is a solid that can sublime. When heated, it transitions directly from a solid to a gas without becoming a liquid first.

3. **Conclusion**:
- Among the options provided, only camphor exhibits sublimation. Therefore, the correct answer is **Option D: Camphor**.

### Final Answer:
The material that exhibits sublimation is **Camphor** (Option D).