Which of the following is a physical change?

Options

A. Boiling of water
B. Boiling of an egg
C. Burning of wood
D. Blooming of a flower

Answer

To determine which of the following is a physical change, we need to analyze each option based on whether a new substance is formed or not. A physical change is characterized by a change in the state or appearance of a substance without altering its chemical composition.

### Step-by-Step Solution:

1. **Identify the Options**: We need to evaluate the different options provided to see which one represents a physical change.

2. **Evaluate the First Option - Boiling of Water**:
- When water is boiled, it changes from a liquid state to a gaseous state (steam).
- No new substance is formed; it is still water (H2O) in a different state.
- **Conclusion**: This is a physical change.

3. **Evaluate the Second Option - Boiling of an Egg**:
- Boiling an egg involves heating it, which changes its composition and structure.
- A new substance is formed (cooked egg).
- **Conclusion**: This is a chemical change.

4. **Evaluate the Third Option - Burning of Wood**:
- Burning wood results in ash, smoke, and gases, which are new substances.
- The original wood cannot be recovered.
- **Conclusion**: This is a chemical change.

5. **Evaluate the Fourth Option - Blooming of Flowers**:
- The blooming process involves chemical changes in the plant, leading to the formation of a flower from a bud.
- This transformation cannot be reversed to return to the original bud.
- **Conclusion**: This is a chemical change.

6. **Final Conclusion**:
- After evaluating all the options, the only option that represents a physical change is the **boiling of water**.

### Answer:
**The boiling of water is a physical change.**

---