Carbon monoxide is a poisonous gas which when inhaled in too much quantity causes headache, nausea, vomiting and even death. The toxicity of carbon monoxide is due to _____.
A
Its greater affinity for hemoglobin as compared to carbon dioxide
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B
Its lower affinity for hemoglobin as compared to carbon dioxide
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C
Its greater affinity for hemoglobin as compared to oxygen
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D
Its greater affinity for oxygen as compared to hemoglobin
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Solution
The correct option is B Its greater affinity for hemoglobin as compared to oxygen
Carbon Monoxide (CO) is found in fumes produced any time we burn fuel in cars or trucks, small engines, stoves, lanterns, grills, fireplaces, gas ranges, or furnaces. CO can build up indoors and poison people and animals who breathe it.
It has a greater affinity for haemoglobin than oxygen does. It displaces oxygen and quickly binds, so very little oxygen is transported through the body cells.