What is the name of the reaction when benzene diazonium chloride is treated with cuprous chloride?

Explanation

To solve the question regarding the name of the reaction when benzene diazonium chloride is treated with cuprous chloride, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
The reactants in this reaction are benzene diazonium chloride (C6H5N2Cl) and cuprous chloride (CuCl).

2. **Understand the Reaction Context**:
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