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C1 and C2 Questions:

1) There are 4 types of food additives, what are they?
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a) Flavour enhancers are added to crisps, why?
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b) Name a food with an emulsifier in.
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c) Explain how emulsifiers work, you may use a drawing to help you.




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5) This question is about perfumes.
Scientists make perfumes in labs to try to recreate natural esters. What is it called when an ester is made
in a lab.
a) Circle the correct answer:

Natural
Chemical
Synthetic
Reversible

b) Esterification is the process used to make a perfume. Write out…

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d) Look at the diagram of an unsaturated polymer called Propene. Why is it unsaturated?





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8) Polymers are often used to make clothes. Nylon is a synthetic Polymer.
a) Why would nylon not be used on its own for a coat?
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b) GoreTex® is used to make…

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b) What would fraction C be?
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c) Long chain hydrocarbons leave at the bottom of the column and shorter ones at the top.
Explain why this is using ideas about intermolecular forces and boiling points.
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10) Hydrocarbon properties change as the bonds get longer.
a)…

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13) Burning fuels releases energy.
Maurine and Jerry have a new heater installed in their home, there are black marks around
the heater.
a) What does this mean?
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Complete combustion is a lot better and safer than incomplete combustion, give two reasons
why?
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