I have my half yearlies coming up soon as well and I'm keeping an eye out for these dotpoints in particular.
1.6 – Outline the steps in the production of polyethylene as an example of a commercially and industrially important polymer
[This might not be a 5/6 marker but possibly a 4 marker depending on school]
3.8 – Assess the potential of ethanol as an alternative fuel and discuss the advantages and disadvantages for its use
I feel as though big topics with 'assess' have potential to be 5/6 markers
4.9 – Gather and present information on the structure and chemistry of a lead-acid cell and evaluate it in comparison to the button cell in terms of:
Impact on society
5.5, 5.6 – Industrial & medicinal radioisotope
[This one is definitely a heavy marker if assessed so be sure to review]
I'm not too experienced and I could be wrong but hope this helps!
Biopolymers and the need for alternatives to ethylene for the petrochemical industry can also be asked. I agree with the above stuff, I've seen lots of qs about the potential of ethanol as an alternative fuel