DP Chemistry (last assessment 2024)
Question 18M.3.sl.TZ1.d
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.3.sl.TZ1.d |
| Level | sl | Paper | 3 | Time zone | TZ1 |
| Command term | Suggest | Question number | d | Adapted from | N/A |
d.
[Maximum mark: 2]
18M.3.sl.TZ1.d
Both HDPE (high density polyethene) and LDPE (low density polyethene) are produced by the polymerization of ethene.
Suggest two of the major obstacles, other than collection and economic factors, which have to be overcome in plastic recycling.
[2]
Markscheme
Any two of:
many types «of plastics» exist
OR
«plastics» require sorting «by type»
«plastics» need to be separated from non-plastic materials
OR
«often» composites/moulded on/bound to non-plastic/other components
Accept other valid factors such as thermal decomposition of some plastics, production of toxic fumes, etc.
[2 marks]
