| Date | November 2017 | Marks available | 1 | Reference code | 17N.3.hl.TZ0.7 |
| Level | HL | Paper | 3 | Time zone | TZ0 |
| Command term | Identify | Question number | 7 | Adapted from | N/A |
Question
Low density polyethene (LDPE) and high density polyethene (HDPE) are both addition polymers.
Describe how the monomers of addition polymers and of condensation polymers differ.
[1]
b.
Identify the type of intermolecular bonding that is responsible for Kevlar®’s strength.
[1]
c.
Markscheme
addition: C=C
AND
condensation: two functional groups needed on each monomer
Accept "alkene/alkenyl" OR "double bond" OR "multiple bond".
b.
hydrogen bonds
Accept “\(\pi - \pi \) stacking/interactions”.
c.
Examiners report
[N/A]
b.
[N/A]
c.
Syllabus sections
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