Cracking 0.0 / 5 ? ChemistryCrude oil, cracking and hydrocarbonsGCSEAQA Created by: HopeCreated on: 29-05-14 14:38 What go through the process of cracking? The fractions that are produced by the distillation of crude oil 1 of 10 What is cracking? A chemical reaction which produces smaller hydrocarbons by breaking the chemical bonds 2 of 10 Why would we needs to use cracking for crude oil? Large hydrocarbon molecules are not efficent as they cannot flow easily and are difficult to ignite 3 of 10 What happens during cracking? The fractions are heated to vaporise them and then are either passed over a hot catalyst or mixed with steam and heated to a high temp 4 of 10 What are the products of cracking> Alkenes 5 of 10 What is the general formula for alkenes? CnH(2)n 6 of 10 What are alkenes? Unsaturated hydrocarbons 7 of 10 What is differnet about their diplayed formula? They always have a double bond 8 of 10 Why are alkenes useful? They can react with oxygen to make fuels and make ethanol and ploymers 9 of 10 How do you test for unsaturation? Using bromine water which is normally a brown colour it becomes colourless when shaken with alkene but remains the shame when shaken with alkane 10 of 10
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