C1- Air quality OCR 21st century 0.0 / 5 ? ChemistryC1- Air QualityGCSEOCR Created by: Liem Mao-TranCreated on: 27-03-16 14:02 Where did the carbon dioxide in the Earths early atmosphere come from? Volcanoes gave out CO2, H2O and nitrogen. 1 of 11 What are the main gases in the Earths current atmosphere? Nitrogen, oxygen and argon 2 of 11 What is the percentage of nitrogen and oxygen in the Earths current atmosphere? Nitrogen = 78%, Oxygen = 21% 3 of 11 What is formed first nitrogen monxide or dioxide? Monoxide 4 of 11 How is nitrogen dioxide formed? nitrogen monoxide must be oxidised to become nitrogen dioxide. 5 of 11 What is a chemical reaction? When atoms are rearranged. 6 of 11 What is a hydrocarbon? Two elements hydrogen and carbon mixed together. 7 of 11 Why are reactants different from the products they make? The products will have different properties because the elemtents are rearranged. 8 of 11 What main element is in coal? Carbon. 9 of 11 Where is sulphur found? In fossil fuels as an impurity. 10 of 11 How doe sulphur dioxide leave the atmosphere? Through acid rain. 11 of 11
Chemistry C7 Notes Completed + Highlighted (Excess) - OCR 21st Century, 2011 Specification 5.0 / 5 based on 1 rating Teacher recommended
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