DP Chemistry (last assessment 2024)
Question 18N.3.sl.TZ0.d
| Date | November 2018 | Marks available | [Maximum mark: 2] | Reference code | 18N.3.sl.TZ0.d |
| Level | sl | Paper | 3 | Time zone | TZ0 |
| Command term | Deduce | Question number | d | Adapted from | N/A |
d.
[Maximum mark: 2]
18N.3.sl.TZ0.d
One way of classifying materials is based on the type of bonding present.
Repeating units of several polymers are listed.
The infrared (IR) spectrum of one of these polymers is shown.
Deduce, giving a reason, the name of this polymer and its Resin Identification Code (RIC), using sections 26 and 30 in the data booklet.
[2]
Markscheme
Name and reason:
PET/PETE AND peak for C=O «at 1700–1750 cm–1» ✔
RIC:
1 ✔
Accept “PET/PETE AND peak for C–O «at 1050–1410 cm–1»” for M1.
Accept “PET/PETE AND peak(s) for COO” for M1.
Accept name or abbreviation for polymer.
No ECF for M2.