Why sulfuric acid is also known as oil of vitriol?

Explanation

### Step-by-Step Solution:

1. **Understanding the Term "Vitriol":**
- The term "vitriol" historically refers to a group of sulfate minerals, particularly those that are corrosive acids. In the context of sulfuric acid, it is derived from the Latin word "vitriolum," which means "sulfate."

2. **Formation of Sulfuric Acid:**
- Sulfuric acid (H₂SO₄) can be produced through the oxidation of sulfur dioxide (SO₂). The chemical reaction involved is:
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