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CAIE A-Level Chemistry AS 20.1 Addition Polymerisation Questions

Practise drawing addition-polymer repeat units from alkenes and deducing one or more monomers from a polymer chain, using structural changes to justify each answer.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • open the monomer C=C into two backbone single bonds while preserving every substituent
  • draw one bracketed repeat unit with continuation bonds crossing both brackets and include n
  • recover the monomer by selecting two backbone carbons and restoring C=C, including for copolymers

Covered syllabus points

20.1.1—Addition polymerisation20.1.2—Repeat units of addition polymers20.1.3—Monomer(s) present20.1.4—The difficulty of the disposal

Question 1

[Maximum number: 1]

Which of the molecular formulae represent at least one compound that can undergo addition polymerisation?
1 C4H8\mathrm{C}_{4} \mathrm{H}_{8}
2 C2H3Cl\mathrm{C}_{2} \mathrm{H}_{3} \mathrm{C} l
3 C3H6O\mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}

A

1, 2 and 3 are correct

B

1 and 2 only are correct

C

2 and 3 only are correct

D

1 only is correct

Question 2

[Maximum number: 1]

An addition polymer is made from monomer Z.
monomer Z

Figure for Question 2 — CAIE A-Level Chemistry AS

What is the structure of the polymer made from this monomer?

A
Figure for Question 2 — CAIE A-Level Chemistry AS — Option A
B
Figure for Question 2 — CAIE A-Level Chemistry AS — Option B
C
Figure for Question 2 — CAIE A-Level Chemistry AS — Option C
D
Figure for Question 2 — CAIE A-Level Chemistry AS — Option D

Question 3

[Maximum number: 1]

A section showing two repeat units of an addition polymer is shown.

Figure for Question 3 — CAIE A-Level Chemistry AS

What is the identity of the monomer that produced this polymer?

A

2-chloro-3-methylbutane

B

2-chloro-3-methylbut-2-ene

C

2-chloropent-2-ene

D

2,4-dichloro-3,3,4,5-tetramethylhexane

Question 4

[Maximum number: 1]

Which statement about PVC is correct?

A

Combustion products of PVC are very alkaline and harmful to breathe in.

B

The empirical formula of PVC is the same as the empirical formula of the monomer.

C

Molecules of PVC are unsaturated.

D

The repeat unit of PVC is (CH2CCl2)\left(\mathrm{CH}_{2} \mathrm{CCl}_{2}\right).

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