State whether the following statements are true or false: Corrosion of metal is a physical change.

Answer

**Step-by-Step Solution:**

1. **Understanding Corrosion**: Corrosion of metal refers to the process where metals react with environmental elements such as oxygen, water, and sulfur. This reaction leads to the deterioration of the metal.

2. **Identifying the Reaction**: During corrosion, metals react with oxygen to form metal oxides, with water to form metal hydroxides, and with sulfur to form metal sulfides. For example, iron reacts with oxygen and moisture to form rust (iron oxide).

3. **Formation of New Substances**: The key aspect of corrosion is that it results in the formation of new substances (like metal oxides, hydroxides, or sulfides). This is a crucial point because it distinguishes corrosion from physical changes.

4. **Defining Physical Change**: A physical change is characterized by changes in physical properties without the formation of new substances. Examples include melting, freezing, or dissolving.

5. **Conclusion**: Since corrosion involves the formation of new substances, it is classified as a chemical change, not a physical change. Therefore, the statement "Corrosion of metal is a physical change" is **false**.

**Final Answer**: False

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