Free, complete O Level Chemistry (Cambridge 5070) and IGCSE Chemistry (Cambridge 0620) resources from Mega Lecture — full-syllabus notes plus topic-by-topic notes, worksheets, cheat sheets, topical questions, MCQs and marking schemes covering the whole syllabus from experimental chemistry to organic chemistry. Every file is a downloadable PDF, no sign-up required.

Cheat Sheets

One-page topic summaries for fast revision every formula, reaction condition and test in one place.

• IGCSE Chemistry 0620 Cheat Sheets Revision and Formula Sheets (Free PDF)

Complete Notes

Whole-syllabus notes covering the entire 5070 course.

• Chemistry Notes By Vasumitra Gajbhiye
• O Level Chemistry Notes
• IGCSE Chemistry

Revision & Reference

• Stoichiometry And The Mole Concept — Questions
• Moles Formulae Equations — Questions
• Data Sheet Revision
• Ionic Formulas
• Definitions Topic 2 Bonding Structure And The Properties Of Matter AQA Chemistry GCSE 1

Topic Notes

• Periodic Table
• Experimental Chem
• Energetics Notes1
• Chemical Tests
• O Level Chemical Bonding 3
• IGCSE Paper 1 Experimental Kinetic Particle Separation Techniques
• IGCSE Paper 1 Atomic Structure And Chemical Bonding
• Experimental Separation Techniques IGCSE
• Organic
• Moles Atp
• Moles And Stoichiometry
• Moles Stoichiometry
• Moles Stoichiometry ATP Without Titration
• Metals
• Metals & the Reactivity Series (0620 Extended) — Complete Topic Notes
• Kinetic Particle IGCSE Gce
• Electrolysis
• Chemical Bonding ML
• Balancing Equations Assignment
• Atomic Structure
• Atomic Structure Gce And
• Acids Bases And Salts O Levs Only
• Organic Chemistry By Sir Pasha O Level 1
• Chem P1
• Chem P2 Topical OL

Questions, MCQs & Worksheets by Topic

Topical questions, MCQs and marking schemes grouped by syllabus topic.

Experimental Chemistry & Analysis

• Experimental Chem — MCQs
• Method Of Purification And Analysis — Questions

Particulate Nature & States of Matter

• Particulate Nature Of Matter — MCQs
• Kinetic Particle — Questions

Atomic Structure & Bonding

• Structure And Properties Of Materials — Questions
• Ionic Bonding — Questions
• Covalent Bonding — Questions
• Metallic Bonding — Questions
• Chemical Bonding Incomplete — Marking scheme
• 2.1 Chemical Bonds Ionic Covalent And Metallic 1 — Marking scheme

Stoichiometry & the Mole

• Moles — MCQs
• Macromolecules — Questions
• Moles And Stoichiometry — Marking scheme
• Moles Stoichiometry — Questions
• Moles Stoichiometry — MCQs

Electrolysis

• Electrolysis P1 — MCQs
• Electrolysis — Questions
• Electrolysis GCE And — MCQs

Chemical Energetics

• Energy From Chemicals — Questions

Reaction Kinetics, Redox & Equilibria

• Rate Of Reaction — Questions
• Redox — Questions
• Reversible Reactions — Questions
• Chemical Equilibrium IGCSE — Questions

Acids, Bases & Salts

• Carboxylic Acids — Questions
• The Characteristic Properties Of Acids And Bases — Questions
• Preparation Of Salts — Questions
• Properties And Uses Of Ammonia — Questions
• Sulfuric Acid — Questions
• Acids Bases And Salts — Marking scheme
• Acids Bases And Salts Basic Only — Questions

The Periodic Table

• Periodic Table — MCQs
• Group Properties — Questions
• Transition Elements — Questions
• Periodic Trends — Questions

Metals

• Metals — MCQs
• Properties Of Metals — Questions
• Reactivity Series — Questions
• Extraction Of Metals — Questions
• Iron — Questions
• Aluminium — Questions

Air, Water & the Environment

• Atmosphere And Environment — MCQs
• Air — Questions
• Water — Questions

Organic Chemistry

• Organic — MCQs
• Alkanes — Questions
• Alkenes — Questions
• Alcohols — Questions
• Worksheet Alkenes — MCQs
• Organic IGCSE Olevels — Marking scheme
• Organic — Marking scheme

Past Papers

• S19 12 — Questions

Related resources

• All free study notes & worksheets
• O Level Physics notes
• O Level Biology notes

Frequently asked questions

Where can I download free O Level Chemistry notes?

Every item above is a free PDF — click any to open or download it, no sign-up needed.

Which syllabus do these follow?

They are aligned to the Cambridge O Level Chemistry 5070 syllabus (also useful for IGCSE Chemistry 0620).

Do you have topic-by-topic practice?

Yes — questions, MCQs and marking schemes are grouped by syllabus topic.

Are these really free?

Yes, completely free. You can also book a free demo lecture below.