Question

Haemoglobin is having maximum affinity with

• A. $CC_{2}$
• B. $CO$
• C. $O_{2}$
• D. $NH_{3}$

Answer 1

Answer: (B)

$CO$

Answer 2

The affinity of haemoglobin for $CO$ is approximately $210$ times greater as compared to $O_2$. It forms a stable compound $CO$ $Hb$ by the combination of carbon monoxide and haemoglobin. Sometimes very small concentration of $CO$ in inspired air may cause suffocation and death.