Crude oil

• How is crude oil formed?

  Crude oil is formed from the remains of ancient marine plants and animals that were buried and subjected to heat and pressure over millions of years.
• Where are the shortest carbon chains found in the fractional distillation column?

  At the top
• Give three products that can be made from crude oil

  Diesel Oil, Kerosene, petrol
• Why is cracking used?

  To brake down the chain lengths to smaller as they are more useful
• Give a product of cracking that is used for making plastics?

  Ethylene
• What is used to test for alkenes?

  Bromine water

  goes from orange to cloudy

  test tube, shake, cloudy and colourless