i think for the chosen chemical( ethene, sulfuric acid, nirtic acid and one other)they will ask fairly generic questions...questions that apply to all of the chosen chemicals....this is what i have seen on the trial exams...including the VCAA trial exam(question 4a in short answer)
here is the link to the VCAA trial exam:
http://www.vcaa.vic.edu.au/vce/studies/chemistry/2008chem2-samp.pdf the other trial exams are very similar....when you think about it there is only a limited number of questions that they can ask as the questions must apply to all of the chosen chemicals
NOTE:All of the chosen chemicals means one of ethene, sulfuric acid, nirtic acid and one other(cant remember) i am just grouping them in this way as it is easier than naming the chosen chemicals every time i refer to them
oh...by the way i am not doing ethene
I think this is the case....if anyone knows better please say