Chemically philosopher of wool is

Options

A. `ZnO`
B. `BaO`
C. `HgCl`
D. `Hg_(2)Cl_(2)`

Answer

To solve the question "Chemically, philosopher's wool is," we need to identify the correct chemical compound referred to as "philosopher's wool" from the given options.

### Step-by-Step Solution:

1. **Understand the Term "Philosopher's Wool":**
- The term "philosopher's wool" is commonly associated with a specific chemical compound. It is important to know what this term refers to in chemistry.

2. **Identify the Options:**
- The options provided are:
1. ZnO (Zinc Oxide)
2. BaO (Barium Oxide)
3. HgCl (Mercury(I) Chloride)
4. Hg2Cl2 (Mercury(II) Chloride)

3. **Research the Compounds:**
- ZnO (Zinc Oxide): This is a white powder that is insoluble in water and is known as philosopher's wool.
- BaO (Barium Oxide): This is not referred to as philosopher's wool.
- HgCl (Mercury(I) Chloride): This is not associated with philosopher's wool.
- Hg2Cl2 (Mercury(II) Chloride): This is also not known as philosopher's wool.

4. **Select the Correct Answer:**
- Based on the information, the correct answer is **ZnO (Zinc Oxide)**, which is indeed referred to as philosopher's wool.

5. **Conclusion:**
- Therefore, the answer to the question is **ZnO**.

### Final Answer:
**Chemically, philosopher's wool is ZnO (Zinc Oxide).**

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