Oil of vitriol is

Options

A. `H_(2)SO_(4)`
B. `H_(2)SO_(3)`
C. `H_(2)S_(2)O_(7)`
D. `H_(2)S_(2)O_(8)`

Answer

**Step-by-Step Text Solution:**

1. **Identify the term "Oil of Vitriol":** The question asks about "Oil of Vitriol," which is a historical name for a specific chemical compound.

2. **Recognize the chemical compound:** The chemical compound commonly referred to as "Oil of Vitriol" is sulfuric acid.

3. **Write the chemical formula:** The chemical formula for sulfuric acid is H₂SO₄.

4. **Historical context:** The term "Oil of Vitriol" was given to sulfuric acid by medieval European chemists. This name reflects its oily appearance and its origin from the distillation of green vitriol.

5. **Explain the origin of sulfuric acid:** Sulfuric acid was historically produced from a substance known as green vitriol, which is iron(II) sulfate (FeSO₄). The preparation involved roasting iron sulfate.

6. **Conclude with the answer:** Therefore, the answer to the question "Oil of Vitriol is" is H₂SO₄ (sulfuric acid).

**Final Answer:** Oil of Vitriol is H₂SO₄ (sulfuric acid).

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