How will you prepare acetaldehyde from acetylene ?

Explanation

To prepare acetaldehyde (CH3CHO) from acetylene (C2H2), we can follow these steps:

### Step-by-Step Solution:

1. **Reaction with Mercuric Sulfate and Dilute Sulfuric Acid**:
- Acetylene reacts with mercuric sulfate (HgSO4) in the presence of dilute sulfuric acid (H2SO4). This reaction is an example of electrophilic addition.
- The mercuric sulfate acts as a catalyst to facilitate the addition of water across the triple bond of acetylene.

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