Name the compound formed by haemoglobin with carbon monoxide.

Answer

**Step-by-Step Solution:**

1. **Understanding Hemoglobin**: Hemoglobin is a protein found in red blood cells that is responsible for transporting oxygen from the lungs to the rest of the body.

2. **Interaction with Carbon Monoxide**: When carbon monoxide (CO) is inhaled, it can bind to hemoglobin in a manner similar to oxygen. However, carbon monoxide has a much higher affinity for hemoglobin than oxygen does.

3. **Formation of the Compound**: The binding of carbon monoxide to hemoglobin results in the formation of a specific compound. This compound is formed when one molecule of carbon monoxide attaches to hemoglobin.

4. **Naming the Compound**: The compound formed by the binding of carbon monoxide to hemoglobin is known as **carboxyhemoglobin**.

5. **Impact on Oxygen Transport**: The formation of carboxyhemoglobin reduces the efficiency of oxygen transport in the blood, as it prevents hemoglobin from binding to oxygen effectively.

**Final Answer**: The compound formed by hemoglobin with carbon monoxide is called **carboxyhemoglobin**.

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