Carbon monoxide gas can be detected by passing it through a blood sample. Explain.

Explanation

**Step-by-Step Solution:**

1. **Understanding Blood Composition**: Blood contains hemoglobin, a protein in red blood cells that binds to oxygen. When oxygen binds to hemoglobin, it forms a compound called oxyhemoglobin.

2. **Introduction of Carbon Monoxide**: When carbon monoxide (CO) is introduced into the bloodstream, it competes with oxygen for binding sites on hemoglobin.

3. **Formation of Carboxyhemoglobin**: Instead of forming oxyhemoglobin, carbon monoxide binds to hemoglobin to form a different compound known as carboxyhemoglobin.

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