DP Chemistry (last assessment 2024)
Question 19N.3.hl.TZ0.b
| Date | November 2019 | Marks available | [Maximum mark: 2] | Reference code | 19N.3.hl.TZ0.b |
| Level | hl | Paper | 3 | Time zone | TZ0 |
| Command term | State and explain | Question number | b | Adapted from | N/A |
b.
[Maximum mark: 2]
19N.3.hl.TZ0.b
Kevlar® is used to make racing tires.
State and explain why plasticizers are added to polymers.
[2]
Markscheme
increases flexibility/softness/plasticity ✔
break/weaken intermolecular forces/IMF/H-bonds «between chains» ✔
