Core Chemistry Chapter 4 AQA 0.0 / 5 ? ChemistryCrude oil, cracking and hydrocarbonsGCSEAQA Created by: taylagreen16Created on: 01-05-16 13:57 What are compounds in crude oil Hydrocarbons 1 of 16 What are hydrocarbons Molecules that contain hydrogen and carbon 2 of 16 What are saturated hydrocarbons Hydrocarbons that have a single bond 3 of 16 Why are different hydrocarbons collected at different levels of a fractional distillation column Different hydrocarbons have different boiling points, condense at different levels 4 of 16 What properties would you expect for a fraction that is collected one third of the way up a fractioning column Viscous liquid, not very flammable, medium-high boiling point 5 of 16 What happens when pure hydrocarbons burn completely They are oxidised to carbon dioxide and water 6 of 16 What is an environmental problem of sulfer dioxide and nitrogen oxide Acid rain 7 of 16 What is produced from incomplete combustion Carbon Monoxide 8 of 16 What are particulates Solid particles that contain carbon and unburnt hydrocarbons 9 of 16 What causes global dimming Tiny solid particulates that reflect sunlight 10 of 16 What are two methods used to reduce amount of sulfer dioxide prodcued by burning fuels Removal of waste gases from power stations, removed before supplied to users 11 of 16 Name two biofuels Biodiesel, ethanol 12 of 16 What are biofuels Fuels made from animal/plant material 13 of 16 Give one advantage and disadvantage of hydrogen as a fuel ad- only produces water when burnt, dis - gas so takes up large volume making it difficult to store in quantities needed fot combustion in engines 14 of 16 How to remove carbon monoxide/nitrogen oxides Cars are fitted with catalyst converters to remove the gases 15 of 16 What happens when pure hydrocarbons burn completely They are oxidised to carbon dioxide and water 16 of 16
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