Edexcel C1 Topic 5

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  1. What is crude oil?
    A mixture of hydrocarbons
  2. What is the definition of a hydrocarbon?
    A compound which contains hydrogen and carbon only
  3. How do we separate crude oil?
    Fractional distillation
  4. List the fractions in order and give their uses
    • Gases - cooking and heating
    • Petrol - fuel for cars
    • Naphtha - lighter fluid
    • Kerosene - fuel for aircrafts
    • Diesel - fuel for cars
    • Fuel oil - fuel for ships
    • Bitumen - suroadsroads
  5. What is the word equation for the complete combustion of butane?
    Butane + Oxygen --> Carbon Dioxide + Water
  6. What toxic gas is produced during incomplete combustion and state the problem it causes
    Carbon monoxide - prevents haemoglobin from carrying oxygen in the blood
  7. How acid rain caused?
    Burning fossil fuels produces sulphur dioxide which dissolves in the rain water
  8. Name 3 problems associated with acid rain
    • Kills fish in lakes and rivers
    • Corrodes limestone buildings and statues 
    • Washes minerals from the soil killing trees
  9. Name two greenhouse gases released when hydrocarbons burn
    • Carbon dioxide
    • Water vapour
  10. What is a biofuel?
    A fuel made from living things
  11. What is the biofuel ethanol made from?
    Sugar cane
  12. What are the advantages of using biofuels?
    • They are made from a renewable source
    • They are carbon neutral
  13. What are the disadvantages of using biofuels?
    • They release carbon dioxide during production
    • They take up land for growing crops
    • Removal of the crops destroy animals habitats
  14. Why is hydrogen a clean fuel?
    It only produces water as a product
  15. What makes a good fuel?
    • Easily ignites
    • Gives off a lot of heat energy
    • Produces no smoke or ash
    • Easily stored e.g. Liquid
  16. Why are alkenes unsaturated?
    Because they contain a double bond
  17. What is the formula for propane?
  18. What is the formula for ethene?
  19. Describe the chemical test for a double bond
    Bromine water goes from orange to colourless
  20. Define cracking
    The breaking of long chain hydrocarbons into shorter alkanes and alkenes
  21. What are the conditions for cracking?
    Heat and a catalyst
  22. Define polymerisation
    The joining of lots of alkene monomers to make a long chain polymers by breaking their double bonds
  23. What is the polymer of ethene called?
  24. What is the polymer of chloroethene called?
  25. State disadvantages of burning, burying and recycling plastics
    • Burning - release toxic gases
    • Burying - they are non-biodegradable so remain in landfill for years
    • Recycling - different plastics means they have to be sorted which is expensive
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Edexcel C1 Topic 5
2013-06-13 12:52:59
Edexcel Chemistry Topic

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