AQA Chemistry 1 More Oils

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AQA Chemistry 1 More Oils
2013-06-13 08:33:04
AQA Chemistry More Oils

AQA Chemistry 1 More Oils
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  1. What is cracking?
    Coverting longer, less sought-after hydrocarbon chains into shorter, more useful ones.
  2. How are fractions cracked?
    Fraction is heated to vapourise them, then the vapours are passed over a hot catalyst.
  3. What is the general formula of an alkene?
  4. Alkenes are unsaturated. What does this mean?
    contains C=C double bonds
  5. How do you test for a C=C double bond?
    Add bromine water. It turns from orange to colourless.
  6. What is a polymerisation reaction?
    The process of adding many small molecules (monomers) together to make very long chains.
  7. Name the polymers made from

    a)  ethene

    b)  propene
    a) polyethene or polythene

    b) polypropene
  8. Polymers are non-biodegradable. What does this mean? 
    microorganisms cannot break them down/decompose them
  9. State 3 methods to dispose of polymers.
    1. bury in landfill

    2. incineration (burn then)

    • 3. recycle
  10. What is an emulsion?
    A mixture of oil and water that stays mixed
  11. Give 2 examples of emulsions.
    salad cream


    skin creams
  12. What do these words mean?

    a) hydrophillic

    b) hydrophobic?
    a) water loving

    b) water hating
  13. How are vegatable oils hardened?
    react with hydrogen at 60oC with a nickel catalyst
  14. What is the difference between saturated and unsaturated oils?
    saturated oils have no double bonds, unsaturated oils have double bonds