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Suggest a reason as to why CO is poisonous.

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Carbon monoxide is poisonous for humans.
It forms a complex with human hemoglobin.
The complex formed between CO and Hb (CO-Hb) is more stable than the oxyhemoglobin complex (O2-Hb) by almost 300 times.
Due to this hemoglobin does not further bind to oxygen.
Final Answer: CO forms a complex with human hemoglobin. The complex formed between CO and Hb (CO-Hb) is more stable than the oxyhemoglobin complex (O2-Hb) by almost 300 times. Due to this hemoglobin does not further bind to oxygen.

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