Hydrogen can be commercially obtained by _____ of acidulated water.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Acidulated Water**:
- Acidulated water is water that has been acidified by adding a small amount of dilute acid, typically dilute sulfuric acid (H₂SO₄). This process creates an environment conducive for electrolysis.

2. **Process of Electrolysis**:
- Electrolysis is a method used to separate elements from their compounds using electricity. In the case of acidulated water, when an electric current is passed through it, the water molecules are split into hydrogen and oxygen gases.

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