1. Give a definition of a polymer.What is the raw material for making plastics? Why is it important to recycle plastics? What is an alkene. Describe how you would test a hydrocarbon to find out if it was unsaturated. Include the expected result in your answer. Complete the diagram below to show the formation of PVC from chloroethene Give a definition of a hydrocarbon Give an advantage and a disadvantage of making ethanol from sugar cane. What is cracking? Draw the structure of propene and give its molecular formula. What is a biodegradable polymer? What substance is used to make a plastic biodegradable? What is the name of the process when ethanol is made from sugar? What catalyst is used to crack hydrocarbons in the lab? What is the function of a catalyst?. Draw a diagram to show the product of reaction between ethene and bromine water? Name this molecule What is the general formula for an alkene? Write an equation for the formation of ethanol from ethene. l Why are hydrogels useful? What groups of molecules are produced by cracking? What special property does a shape memory polymer have?

2. Give a definition of a polymer. Very large long chain molecule made up of lots of small repeating units called monomers What is the raw material for making plastics? Crude oil Why is it important to recycle plastics? They are made from crude oil, which is a finite resource. We are running out of landfill space What is an alkene. Unsaturted hydrocarbon. Describe how you would test a hydrocarbon to find out if it was unsaturated. Include the expected result in your answer. Shake with bromine water Turns orange to colourless if unsaturated. Complete the diagram below to show the formation of PVC from chloroethene Give a definition of a hydrocarbon Compound made of hydrogen and carbon atoms only Give an advantage and a disadvantage of making ethanol from sugar cane. There is a plentiful supply of sugar cane / sugar cane is renewable (unlike crude oil) Uses crops that would otherwise be used for food / takes a lot of space What is cracking? Breaking long chain hydrocarbons into smaller, more useful molecules. Draw the structure of propene and give its molecular formula. C 3 H 6 What is a biodegradable polymer? Polymer that can be decomposed by soil microbes What substance is used to make a plastic biodegradable? Cornstarch What is the name of the process when ethanol is made from sugar? fermentaiton What catalyst is used to crack hydrocarbons in the lab? Ceramic pot What is the function of a catalyst? To speed up a chemical reaction. Draw a diagram to show the product of reaction between ethene and bromine water? Name this molecule ethene What is the general formula for an alkene? CnH 2n Write an equation for the formation of ethanol from ethene. Ethene + water -> Ethanol Why are hydrogels useful? They absorb water What groups of molecules are produced by cracking? Alkanes and alkenes What special property does a shape memory polymer have? Returns to its original shape following heating or cooling