DP Chemistry (last assessment 2024)
Question 17N.3.hl.TZ0.7
| Date | November 2017 | Marks available | [Maximum mark: 2] | Reference code | 17N.3.hl.TZ0.7 |
| Level | hl | Paper | 3 | Time zone | TZ0 |
| Command term | Describe, Identify | Question number | 7 | Adapted from | N/A |
7.
[Maximum mark: 2]
17N.3.hl.TZ0.7
Low density polyethene (LDPE) and high density polyethene (HDPE) are both addition polymers.
(b)
Describe how the monomers of addition polymers and of condensation polymers differ.
[1]
Markscheme
addition: C=C
AND
condensation: two functional groups needed on each monomer
Accept "alkene/alkenyl" OR "double bond" OR "multiple bond".
(c)
Identify the type of intermolecular bonding that is responsible for Kevlar®’s strength.
[1]
Markscheme
hydrogen bonds
Accept “ stacking/interactions”.
