DP Chemistry (last assessment 2024)
Question 19M.3.hl.TZ1.4e
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.hl.TZ1.4e |
| Level | hl | Paper | 3 | Time zone | TZ1 |
| Command term | State | Question number | e | Adapted from | N/A |
e.
[Maximum mark: 1]
19M.3.hl.TZ1.4e
Polybutadiene, used in truck tyres, is a polymer of buta-1,3-diene. The spatial arrangement of atoms in the polymer depends on the type of catalyst used.
(e)
State one factor considered when making green chemistry polymers.
[1]
Markscheme
Any one of:
high content of raw materials in product/high atom economy [✔]
use of low toxic chemicals/catalysts/materials/solvents [✔]
renewable feedstock/raw materials [✔]
use of renewable/clean/low carbon energy source [✔]
high safety standards [✔]
increase energy efficiency [✔]
waste recycling [✔]
Note: Accept other reasonable answers.
Examiners report
Most candidates were able to state a factor considered when making green chemistry polymers.
