O Level Chemistry past paper questions by topic

34 syllabus topics · 2,752 real questions from 5070 papers, sorted by the syllabus.

1States of matter92 written · 32 multiple choice
2.1Elements, compounds and mixtures · Atoms, elements and compounds51 written
2.2Atomic structure and the Periodic Table · Atoms, elements and compounds50 written
2.3Isotopes · Atoms, elements and compounds15 written
2.4Ion and ionic bonds · Atoms, elements and compounds179 written
2.5Simple molecules and covalent bonds · Atoms, elements and compounds56 written
2.6Giant covalent structures · Atoms, elements and compounds16 written
2.7Metallic bonding · Atoms, elements and compounds30 written
3.1Formulae · Stoichiometry151 written
3.2Relative masses of atoms and molecules · Stoichiometry24 written
3.3The mole and the Avogadro constant · Stoichiometry159 written
4Electrochemistry111 written · 59 multiple choice
5Chemical energetics66 written · 36 multiple choice
6.1Physical and chemical changes · Chemical reactions70 written
6.2Rate of reaction · Chemical reactions100 written
6.3Reversible reactions and equilibrium · Chemical reactions63 written
6.4Redox · Chemical reactions140 written
7Acids, bases and salts71 written · 73 multiple choice
8The Periodic Table31 written · 72 multiple choice
9Metals81 written · 95 multiple choice
10Chemistry of the environment74 written · 61 multiple choice
11.1Formulae, functional groups and terminology · Organic chemistry86 written
11.2Naming organic compounds · Organic chemistry10 written
11.3Fuels · Organic chemistry6 written
11.4Alkanes · Organic chemistry26 written
11.5Alkenes · Organic chemistry49 written
11.6Alcohols · Organic chemistry29 written
11.7Carboxylic acids · Organic chemistry11 written
11.8Polymers · Organic chemistry34 written
12.1Experimental design · Experimental techniques and chemical analysis311 written
12.2Acid–base titrations · Experimental techniques and chemical analysis26 written
12.3Chromatography · Experimental techniques and chemical analysis12 written
12.4Separation and purification · Experimental techniques and chemical analysis20 written
12.5Identification of ions and gases · Experimental techniques and chemical analysis74 written

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