Ethyne gives ____ precipitate with ammoniacal solution of copper (I) chloride. (red/blue)

Explanation

To solve the question "Ethyne gives ____ precipitate with ammoniacal solution of copper (I) chloride," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Compounds Involved**:
- The question involves ethyne (C₂H₂) and ammoniacal solution of copper (I) chloride (CuCl).

2. **Understand the Reaction**:
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