Name the apparatus to demonstrate fermentation.

Explanation

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

1. **Understanding Fermentation**: Fermentation is a metabolic process that converts sugar into acids, gases, or alcohol using microorganisms, primarily yeast. In this process, yeast acts on sugar solutions to produce ethanol and carbon dioxide.

2. **Apparatus Required**: To demonstrate fermentation, specific apparatus is needed. The primary apparatus used is a **conical flask**.

3. **Setting Up the Experiment**:
- Add a sugar solution (like glucose) and yeast into the conical flask.
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