one hour is quite a fair amount of time. the key is in
organising it.
for example, if you know that you are particualarly sucky in a
certain topic, when you see a question pertaining to that topic,
read it and judge if you have done anything similar, if you can't
recall anything on the spot, skip it.
Chemistry questions are quite standard usually, except for
certain stuff like molar calculations--they generally tend to be
harder cause they require a solid grasp on multiple topics. eg
balancing of equations, properties of the elements, as
well as the different formulas. for those questions, if you don't
get them, just skip.
spend time on getting the questions you know correct. Even if
your goal is to secure and A1, you can afford to get 10 questions
wrong. it allows for you to have a few questions that you cant do.
But, if you waste these 10 questions on not getting the questions
that you do know, wrong then it's just plain stupid.
one way i do it is>>
1.finish as quickly as possible, skip questions that i dont
know
2. go back to the questions previously skipped (you
might suddenly remember how to do them)
the key here is to get the one you can do done, if you're still
left with questions you don't know, let them be.
3.check through work + double check against the OAS sheet
4. if you stil have time, reread the questions you didnt know
how to do,do some logical reasoning, and pick the answer
accordingly, if all fails just pick any random one :D
5. hand up the paper. cause by the time you finish all of the
above, your 1 hour would have been up :D
these are just tips for exams, practice and hard work of course
is still a necessity.
by the way, it is possible for you to do well for chem. last
year, i nearly failed my chem paper. i got a meagre 27/45. and this
year i've acutally managed to get 39/45. (though i must admit quite
alot of people in my class got that too, but still...)
anyways, believe in yourself, work hard and
jiayou! :D