14.3. Carbon monoxide gas is more dangerous than carbon dioxide gas. Why?
Yes, carbon monoxide is more poisonous than carbon dioxide, (non-toxic in nature). has the ability to block delivery of oxygen to the organ and tissue. Also, it binds to haemoglobin to form a complex carboxyhaemoglobin, which is 300 times more stable than the oxygen-haemoglobin complex.
If the concentration of these complex reaches 3-4% then the capacity of blood to carry oxygen is reduced.
On the other hand, is not poisonous, it is harmful only at high concentration.