Tips for O Level Chemistry Paper 1 (MCQs) Exam


In less than 5 days time, it will be the O Level Chemistry Paper 1 (MCQs) Examination.

Duration of Paper 1 is 1 hour and there will be 40 multiple choice questions for students taking the Pure Chemistry syllabus.

Paper 1 is based on total of 40 marks and the Weightage is as high as 30%, in case you are not aware of it. In view that paper 1 is only for 1 hour, you must not waste time. In fact you have an average of 1.5 minutes for each question.

Following are some Tips for taking Chemistry Paper 1 Exams: –  i would recommend the sequence:

1) Quickly but carefully go through the paper, and shade all the answers to questions that you immediately know the correct answer. For questions that you are unsure of, or require more time to work out (such as Mole Calculation Questions), circle the question number and come back to it later.

2) Now, go through the paper looking at those questions number that you have circled earlier. Go through those carefully. You may be left with a few questions you cannot work out. You may have to make some guessing here, but to me, we have a method to “guess smartly”. I call it the ELIMINATION PROCESS.


Each question has 4 possible answers. It is important for you to eliminate as many unlikely choices and consider those that are still possbile. Doing elimination is better than anyhow guess the answers. Based on statistics probability, the chances of getting the answers correct if choosing blindly is 1/4 = 25% chance of getting it right. If you manage to eliminate 2 choices off, it simply means you have a 50% chance of getting the correct answers!!

You may be able to eliminate one or more of the choices bcos:

i) You have never seen it before, or

ii) the answers does not fit into other answers that you have came across from similar questions done before (rmbr i told you before that chemistry questions are pretty standard, the questions are pretty similar year-after-year, with minor changes to values and ways to testing you).

Hope this information helps!

Sean =)

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Many people talked about teaching Chemistry, I simply LOVE it. I am a passionate Chemistry Coach based in Singapore, Southeast-Asia and aspire to be one of the most dynamic, powerful and humorous speakers in Asia. My 18+ years of coaching experience has equipped me to understand the true reasons why students are not able to perform well in Chemistry, and allow me to structure my teaching methodology to cater to different levels of learners. If you have found this post useful, please share it with your friends. I would really appreciate it! Sean Chua

10 Responses to Tips for O Level Chemistry Paper 1 (MCQs) Exam

  1. May God bless who ever wrote this. Very helpfl to me, as a current chemistry student. OMG second countdown looks scary :/

  2. hey…… i have problem regarding solving mOles calculations, and ATP …. how to practice them…??????????? plz i would be thank full if u give me any hints or teach me how to……..???/

  3. Do you mean that you would like to have some practice questions based on examinations?

    Where are you from?

    Look forward to hearing from you so that we know how to help you.

    PS: alternatively you can drop us an email to

    To Your Academic Success in Chemistry,
    Master Trainer

  4. hello everyone pl
    zzzz help me in chemistry i dnt knw y i feel difficulty in it help me if any one is there who is master in chem n tell

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