Thanks Brendan and Chrise
I solved these thank you. And I've got 25 and 27 amongst others.
Thanks Chrise for my formula for alcohol. I did find it in my old school organic chemistry book. It brought back memories. We did the quiz on zoom, but not many participants and nobody got 50%. I'm sure you would have all done better than that.
I'm mostly stuck on the top left quarter now. Please can I have a couple of hints for 2d I have P?????U? Is it a metal? and 11acfor which I have nothing. I've thought of an answer, but can see where the Highlands fit in.