Suggest a reason as to why `CO` is poisonous.

1.	Suggest a reason as to why `CO` is poisonous.
Answer» Carbon monoxide is highly-poisonous because of its ability to form a complex with haemoglobin. The CO–Hb complex is more stable than the `O_(2)–Hb` complex. The former prevents Hb from binding with oxygen. Thus, a person dies because of suffocation on not receiving oxygen. It is found that the CO–Hb complex is about 300 times more stable than the `O_(2)–Hb` complex.

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Suggest a reason as to why `CO` is poisonous.

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