Are all chemical changes desirable changes ? Justify with at least five example.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks whether all chemical changes are desirable and requires justification with at least five examples.

2. **Conclusion**: The answer is **No**, not all chemical changes are desirable. Desirable changes are those that are useful or beneficial, while undesirable changes lead to negative consequences.

3. **Example 1 - Rusting of Iron**:
- Rusting is a chemical change where iron reacts with oxygen and moisture to form rust (iron oxide).
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