Which one of the following dissolves more rapidly in blood haemoglobin than oxygen ?

Options

A. Ozone
B. Nitrous oxide
C. Sulphur dioxide
D. Carbon monoxide

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which substance dissolves more rapidly in blood hemoglobin than oxygen. We need to identify the correct gas from the given options.

2. **Analyzing the Options**:
- **Ozone**: Ozone (O₃) is primarily found in the stratosphere and is not involved in the transport of oxygen in the blood. Therefore, it is not the correct answer.
- **Nitrous Oxide**: Nitrous oxide (N₂O) is an anesthetic and a greenhouse gas, but it does not interact with hemoglobin in the same way as oxygen. Thus, it is also incorrect.
- **Sulfur Dioxide**: Sulfur dioxide (SO₂) is a major air pollutant and can lead to acid rain but does not bind with hemoglobin. Hence, this option is incorrect as well.
- **Carbon Monoxide**: Carbon monoxide (CO) is a colorless, odorless gas that has a very high affinity for hemoglobin, forming a stable complex known as carboxyhemoglobin. This complex is formed more readily than oxyhemoglobin (the complex formed with oxygen).

3. **Conclusion**: Based on the analysis, carbon monoxide is the substance that dissolves more rapidly in blood hemoglobin than oxygen. Therefore, the correct answer is **carbon monoxide**.

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