Solid carbon dioxide is used as :

Options

A. Posion
B. Fire extinguisher
C. Refrigrant
D. Artitifical respeiration

Answer

To solve the question "Solid carbon dioxide is used as:", we will analyze the properties and applications of solid carbon dioxide, commonly known as dry ice.

### Step-by-Step Solution:

1. **Identify Solid Carbon Dioxide**:
- Solid carbon dioxide is commonly referred to as dry ice.

2. **Understand the Properties of Dry Ice**:
- Dry ice has the unique property of sublimation, which means it can transition from a solid state directly to a gas without becoming a liquid.

3. **Applications of Dry Ice**:
- Due to its sublimation property, dry ice is primarily used for refrigeration purposes. It is effective in keeping items cold, especially in situations where traditional refrigeration is not available.

4. **Evaluate the Options**:
- The question provides multiple options. We need to determine which one accurately describes the use of solid carbon dioxide:
- A) Poison
- B) Fire extinguisher
- C) Refrigerant
- D) Artificial respiration

5. **Select the Correct Option**:
- Among the options, the only application that aligns with the properties of dry ice is as a refrigerant (Option C). The other options (poison, fire extinguisher, artificial respiration) do not correctly describe the use of solid carbon dioxide.

### Final Answer:
- Solid carbon dioxide is used as a refrigerant (Option C).

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