221 Chemistry O Level Paper 1 (MCQ’s) Topical Worked Solutions

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221 Chemistry O Level Paper 1 (MCQ’s) Topical Worked Solutions

• All variants
• Mark schemes included
• References of repeated questions added
• Questions order new to old
• Worked Solutions

TABLE OF CONTENTS

UNIT 1 STATES OF MATTER
1.1 Solids, Liquids and Gases
1.2 Diffusion
1.3 Multiple topics
Answers Section

UNIT 2 ATOMS, ELEMENTS AND COMPOUNDS
2.1 Elements, Compounds and Mixtures
2.2 Atomic structure and Thee Periodic table
2.3 Isotopes
2.4 Ion and Ionic bonding
2.5 Simple Molecules and Covalent Bonds
2.6 Giant Covalent Structures
2.7 Metallic Bonding
2.8 Multiple topics
Answers Section

UNIT 3 STOICHIOMETRY
3.1 Formulae
3.2 Relative Masses Of Atoms And Molecules
3.3 The Mole And The Avogardo Constant
3.4 Multiple topics
Answers Section

UNIT 4 ELECTROCHEMISTRY
4.1 Electrolysis
4.2 Hydrogen-Oxygen Fuel cells
4.3 Multiple topics
Answers Section

UNIT 5 CHEMICAL ENERGETICS
5.1 Exothermic & Endothermic Reactions
5.2 Multiple topics
Answers Section

UNIT 6 CHEMICAL REACTIONS
6.1 Physical and Chemical Changes
6.2 Rate Of reactions
6.3 Reversible reactions And Equilibrium
6.4 Redox
6.5 Multiple topics
Answers Section

UNIT 7 ACIDS BASES AND SALTS
7.1 The characteristic properties of acids and bases
7.2 Oxides
7.3 Preparation of salts
7.4 Multiple topics
Answers Section

UNIT 8 THE PERIODIC TABLE
8.1 Arrangement Of Elements
8.2 Group I properties
8.3 Group VII Properties
8.4 Transition Elements
8.5 Noble Gases
8.6 Multiple Topics
Answers Section

UNIT 9 METALS
9.1 Properties of metals
9.2 Uses of metals
9.3 Alloys and Their Properties
9.4 Reactivity series
9.5 Corrosion Of Metals
9.6 Extraction Of Metals
9.7 Multiple Topics
Answers Section

UNIT 10 CHEMISTRY OF ENVIRONMENT
10.1 Water
10.2 Fertilizers
10.3 Air Quality And Climate
10.4 Multiple Topics
Answers Section

UNIT 11 ORGANIC CHEMISTRY
11.1 Formulae, Functional Groups and Terminology
11.2 Naming Organic Compounds
11.3 Fuels
11.4 Alkanes
11.5 Alkenes
11.6 Alcohols
11.7 Carboxylic Acids
11.8 Polymers
11.9 Multiple Topics
Answers Section

UNIT 12 EXPERIMENTAL TECHNIQUES AND CHEMICAL ANALYSIS
12.1 Experimental Design
12.2 Acid-Base Tritrations
12.3 Chromatography
12.4 Separation And Purification
12.5 Identification Of Ions And Gases
ANSWER SECTION