Which among the following gases readily combines with the haemoglobin of the blood?
A
Methane
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B
Nitrogen
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C
Carbon monoxide
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D
Sulphur dioxide
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Solution
The correct option is C Carbon monoxide Carbon monoxide readily combines with the haemoglobin of the blood.
Carboxyhaemoglobin (symbol COHb or HbCO) is a stable complex of carbon monoxide and haemoglobin (Hb) that forms in red blood cells upon contact with carbon monoxide (CO).