To solve the question, we need to analyze the reactions of the given elements (copper, sulfur, carbon, and zinc) with hot concentrated sulfuric acid (H₂SO₄) and determine which one produces two gaseous products.
### Step-by-Step Solution:
1. **Identify the Elements**: The elements given are copper (Cu), sulfur (S), carbon (C), and zinc (Zn).
2. **Reaction of Copper with Concentrated H₂SO₄**:
- When copper reacts with hot concentrated sulfuric acid, the reaction can be represented as:
\[
\text{Cu} + 2 \text{H}_2\text{SO}_4 \rightarrow \text{CuSO}_4 + 2 \text{H}_2\text{O} + \text{SO}_2
\]
- **Products**: Copper sulfate (CuSO₄) is a solid, water (H₂O) is a liquid, and sulfur dioxide (SO₂) is a gas. Thus, there is only **one gaseous product** (SO₂).
3. **Reaction of Sulfur with Concentrated H₂SO₄**:
- The reaction of sulfur with hot concentrated sulfuric acid is:
\[
\text{S} + 2 \text{H}_2\text{SO}_4 \rightarrow 2 \text{SO}_2 + 2 \text{H}_2\text{O}
\]
- **Products**: Sulfur dioxide (SO₂) is a gas, and water (H₂O) is a liquid. Thus, there is only **one gaseous product** (SO₂).
4. **Reaction of Carbon with Concentrated H₂SO₄**:
- The reaction of carbon with hot concentrated sulfuric acid can be represented as:
\[
\text{C} + 2 \text{H}_2\text{SO}_4 \rightarrow \text{CO}_2 + 2 \text{SO}_2 + 2 \text{H}_2\text{O}
\]
- **Products**: Carbon dioxide (CO₂) and sulfur dioxide (SO₂) are both gases, while water (H₂O) is a liquid. Thus, there are **two gaseous products** (CO₂ and SO₂).
5. **Reaction of Zinc with Concentrated H₂SO₄**:
- The reaction of zinc with hot concentrated sulfuric acid is:
\[
\text{Zn} + 2 \text{H}_2\text{SO}_4 \rightarrow \text{ZnSO}_4 + 2 \text{H}_2\text{O} + \text{SO}_2
\]
- **Products**: Zinc sulfate (ZnSO₄) is a solid, water (H₂O) is a liquid, and sulfur dioxide (SO₂) is a gas. Thus, there is only **one gaseous product** (SO₂).
6. **Conclusion**: Among the elements analyzed, only carbon produces **two gaseous products** (CO₂ and SO₂) when reacted with hot concentrated sulfuric acid.
### Final Answer:
**Carbon (C)** is the element that is oxidized by concentrated H₂SO₄ into two gaseous products.
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