How to Revise for O Level Science Effectively & Quickly

August 31, 2020


How to Revise for O Level Science Effectively & Quickly


The O Level Chemistry Examination not only tests the number of chemical facts and definitions you have remembered, but also if you know how to apply the chemistry concepts and solve application problems.

About 30% of the marks are given for recall of facts and definitions, the rest are for understanding and applications of chemistry concepts.


Following are the Skills required for you to do well in O Level Chemistry Exam:


  • Knowledge of CONCEPTS such as Reactivity Series of Metals & Its Applications

  • Knowledge of FACTS such as Uses of Petroleum Fractions

  • Knowledge of OBSERVATIONS that occurs in many experiments

  • Ability to use FLOW-CHARTS to solve questions related to Qualitative Analysis

  • Ability to SKETCH, PLOT and INTERPRET graphs and diagrams

  • Knowledge of the SOCIAL, ECONOMIC and ENVIRONMENTAL ASPECTS of Chemistry such as effects of pollutions

  • Ability to use CHEMICAL CALCULATIONS to solve problems related to Mole Concepts and Chemical Reactions.

As you can see, a large part of the marks will come from Definitions and essential Science Concepts. You will do well if you know all the above points..


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