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13/05/2026
Part 5 | SUMMARIES & NOTES
Here are all the reactions you should know in O Level Organic Chemistry, with all 4 homologous series (alkanes, alkenes, alcohols and carboxylic acids) SUMMARISED INTO 1 FLOWCHART
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This is everything you need!
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Part 4 | IT’S A TRAP!
Categorising Elements, Compounds and Mixtures are the easiest marks in O Level Chemistry, but these are traps I’ve seen students fall for year after year.
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Part 10 | CHER, HOW TO DO AH?
Difficulty: 8/10
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Special thanks to the student who sent me this!
Part 4 | SUMMARIES & NOTES
Electroplating may seem hard to understand, but it is actually pretty easy! Don’t overcomplicate it.
Remember RED CAT (🐈 ) AN OX (🐂)
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07/05/2026
Part 3 | SUMMARIES & NOTES
You are definitely expected to write state symbols in O Level Chemistry! Writing just 1 of it wrong will result in 0 marks. Here is how to write the correct state symbols every single time!
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Part 9 | CHER, HOW TO DO AH?
Difficulty: 6.5/10
Remember this:
KI (O.A) -> Colourless to Brown KmnO4 (R.A) -> Purple to Colourless
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Part 3 | IT’S A TRAP!
In electrolysis, the electrolyte needs to be in the molten (liquid) or the aqueous state. But depending on what you want to obtain, the choice of electrolyte is crucial. One wrong choice, and you get a completely different outcome.
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Part 3 | CHER, WHY LIDDAT AH?
Why do we sometimes use the word “bases” but other times “alkalis”? Are they the same thing? Let’s find out!
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