C1 Questions - exam style/past paper

Just a few questions put together from past papers and some I have made a bit different. No mark scheme, sorry

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  • Created by: Jazz M
  • Created on: 26-03-11 12:32
Preview of C1 Questions - exam style/past paper

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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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2) Active and intelligent packaging is used to help food last longer.
a) Name one product that uses active packaging to improve the quality of a product?
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b) Why do you sometimes find silica gel sachets in food?
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3) Fill in the gaps using your own knowledge:
a) Cooking is a ____________ change. We cook things to make them ________ better, easier to
__________ and have a better ___________.
b) Why do we have to cook potatoes?
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c) When we cook meat or eggs, something happens to the protein molecules. What is the name of this
process?
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4) Baking powder undergoes a chemical change when heated. Sodium hydrogencarbonate is heated to
make sodium carbonate, CO2 and water.
a) Write a word equation for this process.
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b) What is the name of this process?
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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 the word equation of Esterification:
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c) Perfumes need certain properties, including being non toxic. Write down 2 other properties that a
perfume needs.…read more

Page 3

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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 waterproof clothing.
It is made of nylon with an outer layer of PTFE / polyurethane.
The PTFE has small holes in it.
The holes make GoreTex® waterproof and breathable.
Explain how.…read more

Page 4

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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) Name 2 of these changes.
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b) Explain the relationship between a hydrocarbon's chain length and boiling point.
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There are two main bonds in crude oil. One of them is the intermolecular forces.…read more

Page 5

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Burning fuels releases energy.
Maurine and Jerry have a new heater installed in their home, there are black marks around
the heater.…read more

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