What is an alkene?An unsaturated hydrocarbon with at least one carbon-carbon double bondA saturated hydrocarbon with no carbon-carbon double bondsA saturated hydrocarbon with at least one carbon-carbon double bondAn unsaturated hydrocarbon with no carbon-carbon double bonds2Which of the following is an alkene?C4H10C2H4CH4C2H63What happens to bromine water when propene is added?Changes from colourless to cloudyChanges from orange to colourlessNo changeChanges from orange to black4Which of the following processes is involved in ‘cracking’? PolymerisationReductionCombustionThermal decomposition5Cracking involves the breakdown of larger less useful hydrocarbons into smaller more useful ones. Which of the following is a use for small alkenes? To make plasticsAs medicineAs fuelTo make roads6Which of these alkenes has the lowest boiling point? C3H6C5H10C4H8C2H4

What is an alkene?A saturated hydrocarbon with at least one carbon-carbon double bondA saturated hydrocarbon with no carbon-carbon double bondsAn unsaturated hydrocarbon with no carbon-carbon double bondsAn unsaturated hydrocarbon with at least one carbon-carbon double bond

The alkenes are unsaturated hydrocarbons. They form a homologous series, the members ofwhich have the same chemical properties.They undergo addition reactions and are easily oxidised.(a) The following hydrocarbons are isomers.CH 3 CH CH CH 2CH 3CH 3 CH 2 CH 2 CH CH 2(i) Explain why these two hydrocarbons are isomers................................................................................................................................................................................................................................................................... [2](ii) Give the structural formula of another hydrocarbon which is isomeric with the above.[1](b) Give the structural formula and name of each of the products of the following additionreactions.(i) ethene and brominestructural formula of productname of product ................................................................................................... [2](ii) propene and hydrogenstructural formula of productname of product ................................................................................................... [2](iii) but-1-ene and waterstructural formula of productname of product ................................................................................................... [2]PhysicsAndMathsTutor.com

Which term describes the molecule shown below? A.Saturated alkyneB.Unsaturated alkeneC.Unsaturated alkyneD.Saturated alkene

Alkanes and alkenes are both series of hydrocarbons.(a) (i) Explain the term hydrocarbon................................................................................................................................................................................................................................................................... [1](ii) What is the difference between these two series of hydrocarbons?..............................................................................................................................................................................................................................................

2. Hydration of Alkenes