Why is carbon monoxide gas particularly dangerous to breathe in enclosed spaces?
AIt instantly freezes lung tissue
BIt binds to hemoglobin in the blood much more strongly than oxygen does, blocking oxygen transport
CIt has a strong, easily noticeable odor that causes headaches
DIt is highly flammable and explosive on contact with skin
Explanation
Carbon monoxide is dangerous because it binds to hemoglobin in red blood cells far more strongly than oxygen does, forming a compound called carboxyhemoglobin that prevents the blood from carrying adequate oxygen to the body’s tissues and organs. It is especially hazardous because it is colorless and odorless, making it difficult to detect without a specialized carbon monoxide detector. Common sources include faulty gas heaters, blocked chimneys, and running vehicle engines in enclosed spaces like garages. Explore more Everyday Science MCQs on mcqstutor to keep practicing.
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