Multiple choice

Carbon monoxide is usually found in lesser amounts and is more harmful than carbon dioxide because

  1. it reacts more quickly with UV rays

  2. it has more affinity for haemoglobin

  3. it has lesser affinity for haemoglobin

  4. it cannot compete with oxygen

  5. -
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carbon monoxide is more harmful than carbon dioxide as it combines more readily with haemoglobin than carbon dioxide. Hence, it does not allow oxygen to combine with haemoglobin.

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