Singapore Junior Chemistry Olympiad
RVHS Class of 2024 · NUS Dentistry
I'm an RVHS senior, and I want to help you do well in the SJChO!
Content covers concepts up to A Levels, condensed into clean and nice-looking notes.
Animations, analogies and explanations for the harder concepts.
Problem set A tests foundational concepts, problem set B tests more competition-style questions.
Revision sessions after major chapters. You can bring your friends along.
Understand the content, use active recall during problem sets to answer questions, and learn how to tackle competition questions.
You don't need to get every question right from the start. First work out what the question is asking and how to approach it. The marks come with practice.
And I want Chemistry to be fun.
A 2-hour written paper.
ContentTests theoretical and analytical chemistry concepts (generally based on the GCE O-Level syllabus extended with higher-order reasoning, data analysis, and creative problem-solving skills).
AdvancementThe top 10% of students (or at least 1 student guaranteed for every 10 participating students from a school) advance to Round 2.
A 2-hour written examination held at NUS (Faculty of Science, LT26–LT29), which may incorporate contexts such as experimental data, problem-solving sets, or video-based observational questions.
AwardsAll Round 2 participants receive either a Gold, Silver, or Bronze medal with a certificate, or a Certificate of Merit. Top-performing schools are also ranked into Bands 1, 2, and 3 based on total individual awards.
The proton number, Z, is the number of protons in the nucleus.
Every blank is a key word or phrase. Each one is revealed on the slides as we go: write it into your notes.
Key terms are defined in boxes like this one.
A special case, an exception, or a point that is easy to miss.
Exam tipHow to tackle a type of question, or a trap to avoid.
Worked exampleA competition-style question solved step by step. Cover the working and try it first.
Going furtherA step beyond the chapter, for when you want more.
Decide what will happen before the animation shows it.
Say what a graph or picture shows, in your own words.
A comparison with something familiar, such as the mole as a dozen, only far larger.
A question like the worked example, for you to attempt.
A harder question that combines several ideas.
A multiple-choice question at the end of a section. The wrong options are common mistakes.
Quick checkWhich label marks a question for you to attempt after a worked example?
Contains the lesson's Your turn and Challenge questions, then practice that tests the chapter's foundational concepts.
Timed at competition pace, with questions from past SJChO papers, O Level prelims and JC papers. I designed a table to add up your marks for each section of the chapter, so you can identify your weak and strong points.
All the notes are in black and white. The first topic is Matter, Mixtures and Separation.
Next: Matter, Mixtures and Separation