Chemistry - Chapter 4 (P1) 0.0 / 5 ? ChemistryCrude oil, cracking and hydrocarbonsProperties of hydrocarbonsGCSEAQA Created by: rebeccamariaCreated on: 31-03-15 18:28 How is crude oil formed? Crude oil is formed from the buried remains of plants and animals (or fossil fuels) 1 of 19 What is crude oil a mixture of? Its a mixture of different compounds including hydrocarbons 2 of 19 What is the process of separating crude oil called? We can separate crude oil into different fractions by using fractional distiliation 3 of 19 What is the process of fractional distilation ? It is heated at the bottom. Then vaporised as you go up the column. Then various fractions are tapped off at different levels where they are condensed 4 of 19 Crude oil is mostly ______. Alkanes 5 of 19 What are the first four alkanes? Methane, ethane, propane, butane 6 of 19 Carbons always make ____ ____. Four bonds 7 of 19 Are alkanes saturated or unsaturated? Saturated 8 of 19 What is the general formula for alkane? CnH2n+2 9 of 19 In comparison with large hydrocarbons, how would you describe small hydrocarbons? More voltar (means how easy they turn to gas) 10 of 19 How can alkanes be described? Saturated 11 of 19 The most viscous hydrocarbons are likely to leave the fractionating column at the______ The bottom 12 of 19 What does voltar mean? How easy they turn into gas 13 of 19 What does viscosity mean? How runny it is 14 of 19 What happens when hydrocarbons burn in good supply of air, carbon dioxide and water? The carbon and hydrogen in the fuel oxidise 15 of 19 What is combustion? Burning 16 of 19 When a fuel is burnt it always produces? Carbon dioxide and water 17 of 19 What is the test for carbon dioxide? Limewater --> turning cloudy 18 of 19 What is the test for water? Cobalt Chloride paper ---> turning pink = in the presence of water 19 of 19
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