Cigarettes smoke contains

Options

A. carbon dioxide
B. carbon monoxide
C. hydrogen oxide
D. hydrogen dioxide

Answer

**Step-by-Step Solution:**

1. **Identify the Components of Cigarette Smoke**: Cigarette smoke is a complex mixture of various gases and particulate matter. It contains numerous harmful substances.

2. **List Common Gases Found in Cigarette Smoke**: Some of the major gases found in cigarette smoke include:
- Carbon Dioxide (CO2)
- Carbon Monoxide (CO)
- Hydrogen Cyanide (HCN)
- Nitrogen (N2)
- Ammonia (NH3)
- Formaldehyde (CH2O)
- Benzene (C6H6)

3. **Analyze the Given Options**: The question provides a list of gases: Nitrogen, Hydrogen Sulfide, Hydrogen Cyanide, and Carbon Dioxide. We need to determine which of these gases are actually present in cigarette smoke.

4. **Match the Gases**:
- **Nitrogen (N2)**: Present in cigarette smoke but not harmful.
- **Hydrogen Sulfide (H2S)**: Not typically found in cigarette smoke.
- **Hydrogen Cyanide (HCN)**: Present in cigarette smoke and is toxic.
- **Carbon Dioxide (CO2)**: Present in cigarette smoke.

5. **Conclusion**: Among the gases listed, Carbon Dioxide and Hydrogen Cyanide are the significant components of cigarette smoke. However, the question seems to focus on identifying one gas that is a major component, which leads us to conclude that Carbon Dioxide is a correct answer.

**Final Answer**: Cigarette smoke contains Carbon Dioxide.

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