Name a substance which acts as halogen carrier during the chlorination of benzene.

Explanation

To answer the question about the substance that acts as a halogen carrier during the chlorination of benzene, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Reaction**:
- The chlorination of benzene involves the reaction of benzene (C6H6) with chlorine gas (Cl2). This reaction requires a catalyst to facilitate the process.

2. **Identifying the Catalyst**:
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