Holy Cross High School
N5 Topic 11 Plastics Homework
Unit 3 – Key Area 2 - Plastics
Forename(s)
Surname
Adapted from materials copyright Scottish Qualifications Authority
Used with permission
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Level
Year
Section
Question
I2
I2
I2
I2
SG
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I2
I2
SG
SG
SG
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2007
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2007
2007
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2011
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Credit
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Credit
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Holy Cross High School
1.
National 5 Chemistry
Plastics
Part of the structure of a polymer is drawn below.
The repeating unit of this polymer is
1
Answer _____
2|Page
Holy Cross High School
2.
National 5 Chemistry
Plastics
The flow diagram shows the manufacture of polythene from hydrocarbons in crude oil.
Which line in the table identifies process X, Y and Z?
Process X
Process Y
Process Z
A
distillation
cracking
hydrolysis
B
cracking
combustion
polymerisation
C
polymerisation
distillation
hydrolysis
D
distillation
cracking
polymerisation
1
Answer _____
3.
Part of the structure of an addition polymer is shown below. It is made using two different
monomers.
Which pair of alkenes could be used as monomers for this polymer?
A
B
C
D
Ethene and propene
Ethene and butene
Propene and butene
Ethene and pentene
1
Answer _____
3|Page
Holy Cross High School
4.
National 5 Chemistry
Plastics
The structure below shows a section of an addition polymer.
Which molecule is used to make this polymer?
Answer _____
1
4|Page
Holy Cross High School
5.
National 5 Chemistry
Plastics
The grid shows the structural formulae of some hydrocarbons.
Identify the two hydrocarbons which can polymerise.
1
Answers _____ _____
6.
The structural formulae for some hydrocarbons are shown below.
Identify the hydrocarbon which could be used to make poly(butane).
1
Answer _____
5|Page
Holy Cross High School
7.
National 5 Chemistry
Plastics
Polystyrene is made from the monomer, styrene. The systematic name for styrene is
phenylethene.
(a)
The monomer used to form polystyrene is shown.
Which part of the structure of styrene allows the polymer to form?
1
(b)
Complete the diagram to show how three styrene molecules join to form part of the
polymer chain.
1
8.
Poly(ethenol) is one of the substances used to cover dishwasher tablets.
A section of the poly(ethenol) polymer is shown.
Draw the structure of the repeating unit for this polymer.
1
6|Page
Holy Cross High School
9.
National 5 Chemistry
Plastics
Polyvinyldichloride (PVDC) is a plastic used in food packaging.
The structure of part of a PVDC molecule is shown.
Draw the full structural formula for the monomer used to make PVDC.
1
10.
Poly(methyl methacrylate) is a synthetic polymer used to manufacture perspex.
The structure of the methyl methacrylate monomer is shown.
(a)
Draw a section of the poly(methyl methacrylate) polymer, showing three monomer
units joined together.
1
(b)
Name the type of polymerisation taking place.
1
7|Page
Holy Cross High School
11.
National 5 Chemistry
Plastics
When superglue sets, a polymer is formed.
Part of the polymer structure is shown.
(a)
Draw the structure of the repeating unit in the superglue polymer.
1
(b)
The polymer shown above contains methyl groups (CH3).
Another type of superglue, used to close cuts, has the methyl groups replaced by either
butyl groups (C4H9) or octyl groups.
Complete the table to show the number of carbon and hydrogen atoms in an octyl
group.
Number of Atoms
Group
Carbon
Hydrogen
methyl
1
3
butyl
4
9
octyl
1
8|Page
Holy Cross High School
12.
National 5 Chemistry
Plastics
Nylon is a polymer made from two different monomers as shown.
During the polymerisation reaction, water is also produced.
Suggest a name for this type of polymerisation.
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9|Page