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GCSE Combined Science · key term
Gases made of nitrogen and oxygen, collectively written as , that cause respiratory problems and contribute to acid rain.
Used by AQA and Edexcel
Specification 5.9.3.2 · Paper 4
Revise: Effects of Atmospheric PollutantsSulfur dioxide and oxides of nitrogen react with water, oxygen and other substances in the atmosphere to form acids. These include sulfuric acid and nitric acid. The acids mix with water in clouds and can fall in rain, making it more acidic than normal rain.
Specification Fuels · Paper 3, Paper 4
Compounds of nitrogen and oxygen, such as NO and NO₂, formed when nitrogen and oxygen react at high temperatures.
Link each named pollutant to its specific effect: carbon monoxide causes poisoning; sulfur dioxide and oxides of nitrogen cause respiratory problems and acid rain; particulates cause health problems and global dimming.
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Air entering an engine contains both nitrogen and oxygen. These gases do not normally react readily, but the high temperatures inside an operating engine allow them to react and form oxides of nitrogen.