Where do the solid particles in particulates come from when a fuel is burned?
Carbon in the fuel that does not burn completely
Sulfur in the fuel that reacts with the oxygen
Nitrogen in the air that reacts with the oxygen
Water vapour in the air that cools and condenses
40 exam-style questions on AQA GCSE Chemistry 9.3 Common atmospheric pollutants and their sources, covering 9.3.1 Atmospheric pollutants from fuels and 9.3.2 Properties and effects of atmospheric pollutants. Each one has a worked solution and a mark scheme showing where the marks go.