The Poisonous nature of Carbon monoxide (CO) is due to its

by

The Poisonous nature of Carbon monoxide (CO) is due to its

insolubility in water
ability to form a complex with haemoglobin
ability to reduce some metal oxides
property of having one sigma bond
This question was previously asked in
UPSC NDA-1 – 2018
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The poisonous nature of carbon monoxide (CO) is primarily due to its ability to bind strongly to haemoglobin in red blood cells.
Carbon monoxide has a much higher affinity for haemoglobin (about 200-250 times greater) than oxygen. When inhaled, CO binds to haemoglobin forming carboxyhaemoglobin (COHb), effectively reducing the capacity of the blood to transport oxygen. This leads to oxygen deprivation in the body’s tissues and organs.
Symptoms of carbon monoxide poisoning include headache, dizziness, nausea, weakness, confusion, and in severe cases, unconsciousness, coma, and death. CO is produced by the incomplete combustion of carbon-containing materials.

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