Carbogen is :

Options

A. Pure form of carbon
B. `COCl_(2)`
C. mixture of `CO` and `CO_(2)`
D. mixture of `O_(2)` and `CO_(2)`

Answer

### Step-by-Step Solution:

1. **Understanding the Term "Carbogen":**
- Carbogen is a term used to describe a specific gas mixture that is utilized in medical settings.

2. **Identifying the Components of Carbogen:**
- Carbogen is primarily composed of two gases: carbon dioxide (CO₂) and oxygen (O₂).

3. **Determining the Proportions of Each Gas:**
- In the mixture, oxygen constitutes approximately 95% of the total volume, while carbon dioxide makes up the remaining 5%.

4. **Recognizing the Purpose of Carbogen:**
- This gas mixture is often administered to patients suffering from respiratory diseases. The purpose is to stimulate their respiration, helping them breathe more effectively.

5. **Eliminating Incorrect Options:**
- It is important to note that carbogen does not contain carbon monoxide (CO) or pure carbon. Therefore, any options suggesting these components are incorrect.

6. **Conclusion:**
- The correct definition of carbogen is a mixture of carbon dioxide (CO₂) and oxygen (O₂) in the specified proportions.

### Final Answer:
Carbogen is a mixture of carbon dioxide (CO₂) and oxygen (O₂), with approximately 95% oxygen and 5% carbon dioxide.

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