uses and cracking of crude oil

• cracking means splitting up long - Chain hydrocarbons into alkenes and alkanes
• short chain hydrocarbons are flammable so make good fuels are in high demand
• products of cracking can be useful as fuels
• Alkenes are a lot more reactive than alkanes
• Bromine water can be used to test for alkenes

  • when bromine water is added to an alkane, no reaction Will happen and it will stay bright orange
  • If its added to an alkene, it will react to make a colourless compound