Write the structural formula of the major product in the following case.
Ethene mixed with air is passed under pressure over a silver catalyst at `250^(@)C`.

Explanation

To determine the major product formed when ethene is mixed with air and passed under pressure over a silver catalyst at 250°C, we can follow these steps:

### Step 1: Identify the Reactants
The reactants in this reaction are:
- Ethene (C₂H₄)
- Air (which contains oxygen, O₂)

### Step 2: Understand the Reaction Conditions
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