During the electrolysis of dilute `H_(2)SO_(4)` oxygen is liberated at anode . Give reason .

Explanation

### Step-by-Step Solution:

1. **Understanding Electrolysis of Dilute H₂SO₄**:
- During electrolysis, an electric current is passed through a solution, causing chemical reactions at the electrodes. In dilute sulfuric acid (H₂SO₄), the acid dissociates into hydrogen ions (H⁺) and sulfate ions (SO₄²⁻).

2. **Dissociation of Water**:
- In dilute solutions, water also dissociates into hydroxide ions (OH⁻) and hydrogen ions (H⁺). Thus, the solution contains H⁺, OH⁻, and SO₄²⁻ ions.

...