Acetylene is treated with dilute hydrochloric acid in presence of `HgCI_(2)`

Explanation

To solve the question of what products are formed when acetylene (ethyne) is treated with dilute hydrochloric acid in the presence of HgCl2, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: The reactants in this reaction are acetylene (C2H2) and dilute hydrochloric acid (HCl) in the presence of mercuric chloride (HgCl2).

2. **Understand the Role of HgCl2**: Mercuric chloride (HgCl2) acts as a catalyst in this reaction. It facilitates the addition of HCl across the triple bond of acetylene.

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