Q. Why is Carbon Monoxide a pollutant?
Answer: Reacts with haemoglobin
Notes: Carbon monoxide (CO) is considered a pollutant since it is toxic to haemoglobic animals (including humans) when encountered in concentrations above about 35 ppm. It combines with haemoglobin to produce carboxy-haemoglobin, which usurps the space in haemoglobin that normally carries oxygen, but is ineffective for delivering oxygen to bodily tissues. HGB with 250 times attinity to carbon monoxides as compared to oxygen is toxic. A level of 50% carboxy-haemoglobin may result in seizure, coma, and fatality.

This question is part of 40000+ MCQs GKToday PCS Mock Tests Series in GKToday Android app. Question Number: 74 in GKToday PCS Mock Test - 29 in above course in App.