In Nelson cell `H_2` is liberated at `"___________"`

Explanation

To answer the question "In Nelson cell, H₂ is liberated at __________," we need to understand the functioning of the Nelson cell and the reactions that occur at the electrodes during electrolysis.

### Step-by-Step Solution:

1. **Understanding the Nelson Cell**:
- The Nelson cell is used for the electrolysis of brine, which is a concentrated solution of sodium chloride (NaCl) in water.

2. **Identifying the Electrodes**:
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