Question

Carbon monoxide is a highly poisonous gas for human beings because

• A. it binds to haemoglobin to form stable compound
• B. it is carcinogenic in nature
• C. it induces the chance of heart attack
• D. it affects nervous system fatally

Answer 1

Answer: (A)

Carbon monoxide $(CO)$ is highly poisonous gas for human being because it binds to haemoglobin to form carboxyhaemoglobin complex, which is about $300$ times more stable than the oxygen-haemoglobin complex.