Name the following chemicals:
Used to create vacuum to show anaerobic respiration.

Explanation

**Step-by-Step Solution:**

1. **Understand Anaerobic Respiration**: Anaerobic respiration is a type of respiration that occurs in the absence of oxygen. It is important to create a condition where oxygen is not present to study this process.

2. **Identify the Need for a Vacuum**: To demonstrate anaerobic respiration, we need to create a vacuum or remove oxygen from the environment where the respiration is taking place.

3. **Find a Suitable Chemical**: We need a chemical that can effectively absorb or take up oxygen from the air. This chemical will help in creating an anaerobic environment.

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