Multiple choice

The pollutant capable of combining with haemoglobin is

  1. CO

  2. CO2

  3. SO2

  4. NO

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The life threatening effects of carbon monoxide arise from its reversible combination with haemoglobin (Hb) in red blood cells, which causes displacement of oxygen. This results in oxygen starvation or anoxia.