Cracking & Hydrocarbons 4.5 / 5 based on 7 ratings ? ChemistryCrude oil, cracking and hydrocarbonsGCSEAQA Created by: MattJGCreated on: 09-02-17 21:02 Are larger hydrocarbons more or less viscous than smaller hydrocarbons? More 1 of 16 Do larger hydrocarbons have a higher or lower boiling point than smaller hydrocarbons? Higher 2 of 16 Are larger hydrocarbons more or less flammable than smaller hydrocarbons? Less 3 of 16 Are large hydrocarbons usually more useful as fuels than smaller hydrocarbons? No 4 of 16 What is the scientific term used for the chemical reaction when a fuel burns? Combustion 5 of 16 What is the name of the process by which large hydrocarbons are broken up into smaller, more useful molecules? Cracking 6 of 16 True or false: During the cracking process, hydrocarbons are first heated to vaporise them. True 7 of 16 During cracking, hydrocarbons are often passed over a substance so that they break apart. What is this substance known as? Catalyst 8 of 16 During cracking, the catalyst __________ the bonds in the large hydrocarbon. Breaks 9 of 16 Cracking by heating to a very high temperature is an example of what type of reaction? Thermal decomposition 10 of 16 As well as alkanes, what other group of hydrocarbons are made as a result of cracking? Alkenes 11 of 16 What substance is used to test for an unsaturated hydrocarbon? Bromine 12 of 16 What is produced by the combustion of Hydrogen? Water 13 of 16 Are alkanes more reactive than alkenes? No 14 of 16 Apart from alkenes and alkanes what else is made during the process of cracking? Hydrogen 15 of 16 The process of cracking sometimes involves vapourising the hydrocarbons and then mixing the vapours with... what? Steam 16 of 16
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