Name the organic compound whose auto-oxidation is used to produce `H_2O_2` commercially or industrially.

Answer

To answer the question about the organic compound whose auto-oxidation is used to produce hydrogen peroxide (H₂O₂) commercially or industrially, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Compound**: The organic compound that is commonly used for the production of hydrogen peroxide is 2-ethyl anthraquinone.

2. **Understand the Process**: The production of hydrogen peroxide from 2-ethyl anthraquinone involves a process of auto-oxidation. In this process, 2-ethyl anthraquinone is first hydrogenated to form 2-ethyl anthrahydroquinone.

3. **Oxidation Reaction**: The 2-ethyl anthrahydroquinone is then oxidized back to 2-ethyl anthraquinone, during which hydrogen peroxide (H₂O₂) is produced as a by-product.

4. **Overall Reaction**: The overall reaction can be summarized as:
- Hydrogenation:
\[ \text{2-ethyl anthraquinone} + H_2 \rightarrow \text{2-ethyl anthrahydroquinone} \]
- Oxidation:
\[ \text{2-ethyl anthrahydroquinone} + O_2 \rightarrow \text{2-ethyl anthraquinone} + H_2O_2 \]

5. **Conclusion**: Therefore, the organic compound whose auto-oxidation is used to produce hydrogen peroxide commercially is **2-ethyl anthraquinone**.