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Q.
Why is carbon monoxide (CO) poisonous for man?
NTA AbhyasNTA Abhyas 2022
Solution:
If a person respires in air containing a normal amount of oxygen (21%) and a small amount of carbon monoxide, he suffers from suffocation because haemoglobin combines with carbon monoxide to form a stable compound. The affinity of haemoglobin to carbon monoxide is about 250 times more than for oxygen. 0.1% of carbon monoxide blocks 50% Hb of the body due to which the oxygen-carrying capacity of blood is decreased. This is called hypoxia.