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HARDMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryEnvironmental ChemistryAchiever Section

The greatest affinity for haemoglobin is shown by which of the following

A.NO
B.CO✓ Correct
C.O₂
D.CO₂
Explanation

Haemoglobin in humans has a very high affinity for carbon monoxide, forming carboxyhemoglobin which is very bright red in colour. Carbon monoxide is thus problematic for humans because it has affinity higher than of oxygen.

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