fractional distillation imp.

• What is crude oil primarily composed of?

  Buried plants and animals
• How long does it take for crude oil to form?

  Millions of years
• Why is crude oil considered a non-renewable resource?

  It takes millions of years to form
• What type of mixture is crude oil?

  Complex mixture
• How are hydrocarbons in crude oil arranged?

  In ring chains
• What type of hydrocarbons are most common in crude oil?

  Alkanes
• What is a fraction in the context of crude oil?

  Groups of hydrocarbons with similar molecular size
• Name an example of a fraction obtained from crude oil.

  Kerosene
• What is another example of a fraction from crude oil?

  Petrol
• What is a third example of a fraction from crude oil?

  Diesel
• How are different fractions separated from crude oil?

  By fractional distillation
• What happens to most of the oil during fractional distillation?

  It is turned to gas
• Where does gas enter during fractional distillation?

  Fractionating column
• What is drained at the bottom of the fractionating column?

  Bitumen
• What is present in a fractionating column?

  A temperature gradient
• Why do different fractions leave the column at different heights?

  Due to their boiling points
• What is petrol primarily used for?

  Fuel in cars
• What is kerosene primarily used for?

  Fuel in planes
• What is diesel primarily used for?

  Fuel in bigger vehicles
• What is fuel oil primarily used for?

  Fuel in ships and power stations
• What is bitumen primarily used for?

  To surface roads