← Cambridge O Levels

Chemistry

Cambridge O Levels · Code 5070

Topics ko order mein karo, har lesson ke baad recall test karo, phir past papers se exam-style questions practise karo.

1 Learn

Explanation parho aur Pakistan-relevant example dekho.

2 Recall

Key-point card se yaad karo, lesson dobara khole bagair.

3 Apply

Quiz attempt karo, mistakes note karo, weak concept par wapas jao.

Topic list

01

States of Matter

Particle arrangement, motion, and energy in solids, liquids, and gases, including state changes.

30 QReady02

Atomic Structure

The fundamental composition of atoms, defining elements, ions, and isotopes.

29 QReady03

Acids, Bases & Salts

Exploring acids, bases, pH, neutralisation, and the systematic preparation of salts.

30 QReady04

Chemical Reactions & Equations

Mastering chemical equations, their balancing, and fundamental reaction types.

30 QReady05

Metals & Reactivity

Explores metal properties, the reactivity series, and its application in predicting reactions and extraction.

30 QReady06

Electrochemistry

The study of electricity's interaction with chemical compounds and reactions.

30 QReady07

Organic Chemistry

The study of carbon compounds, focusing on hydrocarbons, their reactions, and polymerisation.

30 QReady08

The Periodic Table

Explore elemental families, trends, and properties across the Periodic Table.

30 QReady09

Experimental Techniques & Chemical Analysis

Mastering lab methods for separating mixtures and identifying unknown chemical substances.

5 QReady10

The Mole & Stoichiometry

The quantitative study of chemical reactions using the mole concept.

5 QReady11

Air & Water

Exploring atmospheric composition, pollutants, the carbon cycle, and water purification methods.

5 QReady12

Atomic Structure & Periodic Table

Protons, neutrons, electrons, electron configuration, periodic trends

8 QReady13

Energy Changes in Chemistry

Exothermic and endothermic reactions, activation energy, bond energies

5 QReady14

Chemical Bonding

Explaining ionic, covalent and metallic bonding through electron transfer or sharing, structure, properties and formulae.

5 QReady

How to turn Chemistry revision into marks

Chemistry becomes manageable when you connect particles, observations, equations, and practical evidence. Har reaction ko sirf words nahi—what changes, why it changes, and how you would know—ke through study karo.

Answer method

  1. Identify the particles, substances, conditions, and observable change involved.
  2. Write balanced formulae and charges carefully before doing mole or ratio work.
  3. Separate what was observed from the particle-level explanation for that observation.
  4. For practical work, name the variable, measurement, safety control, and evidence needed for the conclusion.

Common traps

  1. Treating a memorised colour or test as an explanation rather than an observation.
  2. Changing a formula to balance an equation instead of changing coefficients.
  3. Confusing concentration, amount, mass, volume, rate, yield, and equilibrium position.
  4. Giving a generic practical improvement that does not change measurement quality or control a variable.

Practice rhythm

  1. Build a reaction map linking reagent, condition, observation, product, and equation.
  2. Complete one calculation with units and one explanation using particle language.
  3. Predict what changes when one condition is altered, then justify the direction of change.
  4. Review missed questions by classifying them as recall, equation, calculation, or practical-evidence errors.

Official material and timed practice

These lessons support revision; confirm the current Cambridge International specification and school exam-entry advice before planning your papers.

Official syllabusOfficial resourcesSaved syllabus PDFPast-paper desk