DP Chemistry (last assessment 2024)
Question 19M.3.hl.TZ1.b(ii)
| Date | May 2019 | Marks available | [Maximum mark: 2] | Reference code | 19M.3.hl.TZ1.b(ii) |
| Level | hl | Paper | 3 | Time zone | TZ1 |
| Command term | State | Question number | b(ii) | Adapted from | N/A |
b(ii).
[Maximum mark: 2]
19M.3.hl.TZ1.b(ii)
E10 is composed of 10% ethanol and 90% normal unleaded fuel.
State the name and function of X in the diagram in (b)(i).
Name:
Function:
[2]
Markscheme
Name:
PEM/proton-exchange membrane/polymer exchange membrane/polymer electrolyte membrane [✔]
Function:
allows the passage of protons/H+ ions «from anode to cathode but not electrons or molecules» [✔]
Examiners report
Was answered well.
