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For Paper 1, short answer is there extra writing space because I haven't seen it. If not, are you able to write past the given lines. Would they still mark it as long as it's within the boxed margins?

The answers are: 2(B), 6(B), 8(C). Just want to know what the reasoning behind the answers is. For Q8 is it because NO2- is a stronger conjugate base and hence, has a higher pH, and for Q6 is it because phosphoric acid is triprotic. Got no idea about Q2, maybe because there is no proton donor...

Hey guys I don't know what to drop and was wondering if you could give some advice. I will be doing 4U/3U Maths, Chem, Physics, Bio, Business Studies and Adv English in Year 12. I'm thinking of either dropping Bio or Business Studies. Please help me. So far I am ranked 1st in all my subjects...