Identify the following reactions as either oxidation or reduction :
`O + 2e to O^(2-)`

Explanation

To identify the given reaction `O + 2e^- → O^(2-)` as either oxidation or reduction, we can follow these steps:

### Step 1: Understand Oxidation and Reduction
- **Oxidation** is defined as the process where the oxidation state of an element increases (loss of electrons).
- **Reduction** is defined as the process where the oxidation state of an element decreases (gain of electrons).

### Step 2: Determine the Oxidation States
- In the reaction, we have:
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