What is the action of conc. `H_2SO_4` on sulfur?

Explanation

To understand the action of concentrated sulfuric acid (H₂SO₄) on sulfur, we can break down the process step by step:

### Step-by-Step Solution:

1. **Understanding Concentrated H₂SO₄**:
- Concentrated sulfuric acid is known for its strong dehydrating and oxidizing properties. It can remove water from substances and oxidize certain elements.

**Hint**: Remember that concentrated H₂SO₄ can act both as a dehydrating agent and an oxidizing agent.
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