Multiple choice

CO is a harmful pollutant because it

  1. has more affinity for haemoglobin

  2. reacts quickly with UV radiations

  3. has less affinity for Hb

  4. cannot complete with oxygen

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

CO has about 200-250 times higher affinity for hemoglobin than oxygen, forming carboxyhemoglobin. This displaces oxygen and reduces oxygen delivery to tissues, causing hypoxia even when sufficient oxygen is present in the air.