GCSE Science Fold Solve Organic Chemistry Fold the

GCSE Science Fold & Solve – Organic Chemistry Fold the answers and work through the questions below. 1 AO 1. Compounds made up of carbon and hydrogen atoms are known as ______. 2. Crude oil is a _____________ of different substances. The substances in crude oil have different _____________ points. Crude oil is separated by fractional _____________. 3. What is the name of the hydrocarbon in the diagram? 4. Which homologous series contains ethane, propane and butane? 5. Which homologous series contains an OH functional group? 2 AO 1. Diesel is separated from crude oil by fractional distillation. Describe the steps involved in the fractional distillation of crude oil. 2. Describe a chemical test that would indicate the presence of ethene (C 2 H 4) in the mixture. 3 AO 1. Poly(ethene) is a thermoplastic that softens easily when heated. Suggest and explain how the structure of PEX changes this property. Answers – Fold this over! AO 1 1. Hydrocarbons. 2. Mixture/Boiling/distilla tion. 3. Propane 4. Alkanes 5. Alcohol. AO 2 1. • Heat to vaporise the crude oil. • Vapours condense. • At different temperatures. 2. • Add bromine water. • Changes from orange to colourless. AO 3 1. • cross links / extra bonds in PEX. • molecules / chains in PEX are held in position • molecules / chains in PEX unable to slide past each other / move.