Sublimation is a chemical change

Answer

**Step-by-Step Solution:**

1. **Understanding Sublimation**: Sublimation is the process where a solid changes directly into a gas without passing through the liquid state. This can also occur in reverse, where a gas changes directly into a solid.

2. **Identifying the Nature of Change**: In sublimation, the only change that occurs is in the physical state of the substance. For example, when camphor is heated, it turns into vapor, and when cooled, it can revert back to solid camphor.

3. **Chemical vs. Physical Change**: A chemical change involves the formation of new substances with different chemical properties. In contrast, a physical change does not produce new substances; it only alters the form or state of the existing substance.

4. **Conclusion**: Since sublimation only changes the physical state of a substance (from solid to gas or gas to solid) without creating any new substances, it is classified as a physical change, not a chemical change.

5. **Final Answer**: Therefore, the statement "Sublimation is a chemical change" is **false**.

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