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Why carbon monoxide (CO) poisonous for man?

a)

It affects the nerves of the lungs

b)

It affects the diaphragm and intercostals muscles

c)

It reacts with oxygen reducing percentage of oxygen in air

d)

Haemoglobin combines with carbon monoxide instead of oxygen and the product cannot dissociate


Question ID - 2993 | Toppr Answer

Why carbon monoxide (CO) poisonous for man?

a)

It affects the nerves of the lungs

b)

It affects the diaphragm and intercostals muscles

c)

It reacts with oxygen reducing percentage of oxygen in air

d)

Haemoglobin combines with carbon monoxide instead of oxygen and the product cannot dissociate

1 Answer - 5876 Votes

3537

Answer Key : (d) -

(d)

If a person respires in air containing normal amount of oxygen (21%) and 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.



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