Compound soluble in water which does not impede oxygen transporation is

Options

A. `SO_(2)`
B. `SO_(3)`
C. `CO`
D. `NO`

Answer

To solve the question "Compound soluble in water which does not impede oxygen transportation is," we will analyze the given options one by one.

### Step-by-Step Solution:

1. **Understand the Question**: We need to identify a compound that is soluble in water and does not interfere with the transportation of oxygen in the blood.

2. **Evaluate the Options**:
- **Sulfur Dioxide (SO₂)**: This compound is soluble in water and does not compete with oxygen for binding sites on hemoglobin. Therefore, it does not impede oxygen transportation.
- **Sulfur Trioxide (SO₃)**: This compound is not soluble in water and thus cannot be considered.
- **Carbon Monoxide (CO)**: This compound is soluble in water but competes with oxygen for binding to hemoglobin, significantly impeding oxygen transport.
- **Nitric Oxide (NO)**: This compound is also soluble in water and competes with oxygen for binding sites on hemoglobin, which means it also impedes oxygen transportation.

3. **Conclusion**: Among the options, only sulfur dioxide is soluble in water and does not impede oxygen transportation. Therefore, the correct answer is **sulfur dioxide (SO₂)**.

### Final Answer:
**Sulfur Dioxide (SO₂)**