The Total solution for NCERT class 6-12
Carbon monoxide combines withhaemoglobin to form a very stable compound known as carboxyhaemoglobin when itsconcentration in blood reaches 3-4%, the oxygen carrying capacity of the bloodis greatly reduced. This results into headache, nervousness and sometimes deathof the person. On the other hand CO2 does not combine withhaemoglobin and hence is less harmful than CO.