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Contents
Metals
Metals
Chapter 1
1 h 5 min
Metals, physical properties of metals
6 min
Alloys
16 min
Reactivity series, reactions of metals with water, steam and acid
11 min
Reactions of alkali metals with cold water
6 min
Reactions of metals with steam
7 min
Reactions of metals with dilute acids
9 min
MCQ: What is the unknown metal, X?
10 min
Worksheet PDF
Answer PDF
Chapter 2
This lesson is not available for trial.
59 min
Displacement of metals
6 min
Using displacement reactions to arrange metals according to reactivity
11 min
Reactivity of a metal according to ease of thermal decomposition of its carbonate
7 min
Extraction of metals using electrolysis, reduction by carbon or hydrogen
7 min
Different types of steel, extraction of iron from haematite
2 min
Process of iron extraction using a blast furnace
6 min
MCQ: In a blast furnace, iron (III) oxide is...
6 min
Structured Q: Will iron be extracted from its ore if magnesium oxide and coal are used...
4 min
Rusting and methods of rust prevention
5 min
MCQ: In which test tube will rusting occur the fastest, and others
5 min


Periodic Table
Periodic Table
Chapter 3
This lesson is not available for trial.
30 min
Periodic table: groups and periods
6 min
MCQ: Changes in properties of elements across a period, down a group
7 min
Group 1 elements (alkali metals)
3 min
MCQ: Write the names and formulae of the products formed when rubidium reacts with water, and others
2 min
Group VII elements (halogens)
6 min
MCQ: Elements X and Y are in Group VII of the Periodic Table..., and others
4 min
Group 0 elements (noble gases)
2 min
Chapter 4
This lesson is not available for trial.
33 min
Transition metals
3 min
MCQ: Beryllium is placed in Group II of the...
7 min
MCQ: The positions of 4 elements are shown in the Periodic Table...
7 min
Structured Q: Describe and explain what you will observe when fluorine is bubbled...
6 min
Structured Q: The table shows some properties of Group I...
4 min
Structured Q: Group I and VII elements show trends in their...
6 min


Electrolysis
Electrolysis
Chapter 5
This lesson is not available for trial.
41 min
Electrolysis: Schematic of an electrolytic cell
3 min
Electrical conductivity of electrolytes and electrodes
6 min
Roles of cathode and anode in redox reactions
4 min
Constructing electrolysis equations
9 min
Constructing redox equations for the electrolysis of water
7 min
Comparing differences in electrolysis of molten, concentrated and diluted salt solutions
12 min
Chapter 6
This lesson is not available for trial.
1 h 9 min
Electrode gas ratio
4 min
Purification of copper using active electrodes
3 min
Electroplating of an object with silver using active electrodes
7 min
Simple cells
3 min
Purpose of a salt bridge
5 min
MCQ: Which product is formed at the anode when molten lead (II) bromide...
4 min
MCQ: In which instance is there no change in concentration...
9 min
Structured Q: An electric cell X has copper and silver electrodes...
8 min
Structured Q: Suggest reason for heat source, identify electrode material, anode...
4 min
Structured Q: The electrolysis of concentrated aqueous sodium chloride...
11 min
Structured Q: An electrolyte set-up using inert electrodes...
11 min
Chapter 7
This lesson is not available for trial.
1 h 3 min
MCQ: Electrolysis of molten lead (II) bromide..., and others
8 min
Structured Q: Electrolysis of sodium chloride solution
5 min
Structured Q: Simple electrochemical cell
5 min
Application Q: Electro-refining is the final stage in producing highly purified copper...
6 min
Application Q: Electrolysis can be used to remove unwanted hair...
4 min
Structured Q: Two electrochemical cells
9 min
Application Q: Chlorine and sodium hydroxide are manufactured by the electrolysis...
10 min
Structured Q: The electrolysis of three different solutions using inert electrodes...
16 min


Energy Changes
Energy Changes
Chapter 8
43 min
Endothermic and Exothermic Reactions
9 min
Bonds broken or bonds formed
4 min
Practice Questions on Endothermic and Exothermic Reactions
9 min
Enthalpy change in a reaction
7 min
Practice Questions on Enthalpy change in a reaction
6 min
Energy Level Diagrams and Practice Questions
8 min
Worksheet PDF
Answer PDF
Chapter 9
This lesson is not available for trial.
57 min
Determining activation energy and enthalpy change
8 min
Catalysts and their effect on activation energy
7 min
Determining enthalpy change using bond energy values
10 min
MCQ: What is the enthalpy change of the decomposition of..., and others
4 min
Structured Q: The decomposition of hydrogen peroxide...
6 min
Application Q: Hydrazine, N₂H₄, is used as rocket fuel
6 min
Structured Q: Fuel cells produce electrical energy...
10 min
Application Q: Instant cooling packs, which are used to treat sports injuries...
6 min


Speed of Reaction
Speed of Reaction
Chapter 10
This lesson is not available for trial.
44 min
Methods to determine speed of reaction, collision theory
3 min
Factors affecting the speed of reaction
8 min
MCQ: Which solution would give the fastest initial rate of reaction...
10 min
Structured Q: A student investigated the time taken for an antacid tablet to react...
5 min
Structured Q: Decomposition of H₂O₂
4 min
Structured Q: A sample of 1.66 g of magnesium carbonate...
14 min


Ammonia
Ammonia
Chapter 11
This lesson is not available for trial.
56 min
Ammonia and sulfur dioxide
5 min
Manufacturing ammonia from N₂ and H₂ via Haber process
7 min
Effect of temperature and pressure on yield of ammonia
10 min
MCQ: What are the operating conditions in the Haber process...
7 min
Structured Q: Name the catalyst used in the Haber process and explain...
4 min
Structured Q: Explain, using collision theory, why increasing pressure will increase yield...
4 min
Structured Q: Ammonia is made by reacting...
9 min
Application Q: One of the uses of ammonia is to make fertilisers...
10 min


The Atmosphere and Environment
The Atmosphere and Environment
Chapter 12
This lesson is not available for trial.
40 min
Composition of air
3 min
Carbon monoxide, effects on human health
4 min
Oxides of N, SO₂, effects of acid rain on the environment
7 min
Unburnt hydrocarbons and methane
3 min
Depletion of ozone layer, carbon cycle, greenhouse effect, global warming
6 min
MCQ: In what way do CFCs, methane and nitrogen dioxide affect...
8 min
Structured Q: The table shows the composition of the atmosphere on the planet Mars...
4 min
Application Q: Most vehicles have petrol or diesel engine, but...
5 min
Chapter 13
This lesson is not available for trial.
33 min
Reducing air pollution - catalytic converters and flue gas desulfurisation
4 min
MCQ: Which method(s) can be used to reduce carbon dioxide emissions...
2 min
MCQ: The diagram shows a section of a catalytic converter...
5 min
Structured Q: The table below gives information about car exhaust emissions...
6 min
Structured Q: In the combustion engine, nitrogen and oxygen react...
2 min
Structured Q: Emissions from power stations contain sulfur dioxide...
7 min
Structured Q: The bar chart illustrates the amount of air pollutants, namely SO₂...
7 min


Introduction to Organic Chemistry
Introduction to Organic Chemistry
Chapter 14
40 min
Fractional distillation of crude oil into 7 main fractions
5 min
MCQ: Fractional distillation of petroleum..., and others
6 min
MCQ: Three consecutive fractions, A, B, and C of petroleum are extracted..., and others
6 min
Homologous series, properties of members in the same homologous series
7 min
MCQ: Identifying members of the same homologous series
3 min
Naming of organic compounds: Usage of prefix and suffix
4 min
Drawing the structural formulae
7 min
Practice: Drawing the full structural formula of propanol and ethanoic acid
2 min
Worksheet PDF
Answer PDF


Alkanes & Alkenes
Alkanes & Alkenes
Chapter 15
This lesson is not available for trial.
43 min
Alkanes
5 min
General formula of alkanes
5 min
Explaining the trend in boiling points of alkanes as molecular size increases
6 min
Reaction of alkane: Combustion
6 min
Reaction of alkanes: Substitution with halogens under UV light
4 min
Practice: What happens when 1 mole of ethane reacts with 2 moles of Cl₂ under UV light..., and others
7 min
Reaction of alkanes: Cracking and why it is important in the petroleum industry
3 min
MCQ: Which hydrocarbon would not be collected in..., and others
7 min
Chapter 16
This lesson is not available for trial.
34 min
MCQ: Which of the following is not true of alkanes, and others
6 min
Structured Q: Cycloalkanes are a class of saturated hydrocarbons..., and others
4 min
Structured Q: Alkanes are generally unreactive, but...
5 min
Structured Q: The flow chart shows a reaction for alkane T...
6 min
Application Q: Crude oil is a raw material which is processed...
6 min
Structured Q: Haloalkanes are alkanes which have one or more...
7 min
Chapter 17
This lesson is not available for trial.
40 min
Alkenes: General formula, functional group, etc
9 min
Reactions of alkenes: Addition and combustion
6 min
Reactions of alkenes: Addition of hydrogen
4 min
Addition of liquid bromine to distinguish between saturated and unsaturated compounds
4 min
MCQ: The reaction between a hydrocarbon CᵧH₈ and Cl₂..., and others
10 min
Structured Q: There are two methods to prepare CH₂BrCH₂Br...
7 min
Chapter 18
This lesson is not available for trial.
52 min
Reaction of alkenes: Addition of steam, converting propene to propanol
3 min
MCQ: The structures of butane and propene..., and others
5 min
Structured Q: Hex-3-ene undergoes reactions...
4 min
Fats & oils, using hydrogenation to determine degree of unsaturation
4 min
Application Q: The diagram shows a food label describing the nutritional content...
7 min
Application Q: Cooking oils contain polyunsaturated fats...
4 min
MCQ: The equation for the reaction of a hydrocarbon, CₓHᵧ..., and others
7 min
MCQ: 1 cm³ of a gaseous hydrocarbon X required 4 cm³ of O₂..., and others
6 min
Structured Q: The catalytic cracking process is used to break up decane, C₁₀H₂₂..., and others
12 min


Alcohols & Carboxylic acids
Alcohols & Carboxylic acids
Chapter 19
This lesson is not available for trial.
45 min
Alcohols: The -OH functional group
3 min
General formula and physical properties of alcohols
4 min
Preparation of ethanol: Hydration & fermentation
5 min
MCQ: Formation of ethanol by the process of fermentation, and others
3 min
Application Q: Countries A to D are ethanol-producing countries...
8 min
Structured Q: Ethanol can be manufactured by two processes. The flowcharts...
5 min
Reaction of alcohols: Combustion, using propanol and butanol as examples
5 min
Oxidation to carboxylic acids via oxidising agents or atmospheric oxygen
5 min
Structured Q: Production of butanol (hydration and fermentation)...
3 min
Application Q: Butan-1-ol can be manufactured from but-1-ene...
4 min
Chapter 20
This lesson is not available for trial.
41 min
Carboxylic acids
6 min
MCQ: An organic compound has the following..., and others
4 min
MCQ: A carboxylic acid has two C=C double bonds..., and others
7 min
Reactions of carboxylic acid
10 min
MCQ: Potassium ethanoate, CH₃COO⁻K⁺, can be prepared..., and others
9 min
MCQ: The structure of butenedioic acid..., and others
5 min


Esters & Isomerisms
Esters & Isomerisms
Chapter 21
This lesson is not available for trial.
1 h 8 min
Esterification
6 min
Production of esters and naming conventions
11 min
MCQ: Methanoic acid reacts with propanol to form...
13 min
MCQ: An alcohol X reacts with acid Y to form an ester with the formula C₈H₁₂O₂...
15 min
Structured Q: Distinguishing between alcohol and carboxylic acid...
12 min
Structured Q: Monobasic vs dibasic acid...
11 min
Chapter 22
This lesson is not available for trial.
1 h 2 min
Isomers: Differences in structural formula and physical properties
9 min
3 types of isomers
11 min
Position isomers
3 min
Functional isomers
9 min
MCQ: Which of the following represents a pair of isomers...
12 min
MCQ: How many structural isomers are there for C₄H₉Cl...
5 min
Structured Q: The reaction scheme below involves several organic substances...
8 min
Structured Q: The aldehydes are a group of organic compounds which contain...
5 min


Macromolecules
Macromolecules
Chapter 23
46 min
Introduction to Macromolecules
5 min
Addition polymerisation: Deducing structural formula of monomer and polymers
8 min
MCQ: Which partial structure is correct for the product of polymerisation of butene...
6 min
Structured Q: Propyl ethanoate is a molecule that can be formed from...
7 min
Condensation Polymerisation & Nylon - Synthetic Polyamide & Terylene & Polyester
8 min
Structured Q: Draw the structural formula of the products...
5 min
MCQ: The diagram shows the repeating unit of a polymer
7 min
Worksheet PDF
Answer PDF
Chapter 24
This lesson is not available for trial.
48 min
Properties of plastics, pros and cons of using plastics
3 min
MCQ: Which of the following is not a problem associated with plastics...
8 min
MCQ: The diagram below shows the structures of two synthetic polymers...
8 min
MCQ: Which of the following monomers cannot form polymers with itself...
9 min
Structured Q: Poly(ethene) is an addition polymer but nylon...
7 min
Structured Q: Parts of the structures of SiO₂ and poly(ethene)...
4 min
Structured Q: Determine the type of polymerisation by identifying functional groups on monomer
9 min


Enthalpy Changes
Enthalpy Changes
Chapter 25
This lesson is not available for trial.
47 min
Recap: Energy changes
2 min
Example #1: Energy changes involved in reaction of propanoic acid with calcium carbonate
9 min
Example #2: Energy changes involved in hydrogenation of butene
9 min
Structured Q: Bacteria decomposes ethanoic acid...
7 min
Structured Q: Cyclobutane reaction with chlorine in the presence of UV light...
5 min
Structured Q: Calculating enthalpy change of combustion of propane...
8 min
Application Q: One possible way to manufacture H₂ involves the reaction between...
3 min
Structured Q: The table shows some data about the enthalpy change when...
4 min


O' Level Revision
O' Level Revision
Chapter 26
This lesson is not available for trial.
54 min
MCQ: Experimental chemistry
10 min
MCQ: gas collection, porous pot experiment, upward delivery of gases
8 min
MCQ: Separation techniques, salt solubility table
5 min
MCQ: Salt solubility table, diffusion, thermal decomposition of carbonates
12 min
Structured Q: Salt solubility table, salt preparation methods, reaction of acids
8 min
Structured Q: Identification of ions and gases
7 min
Structured Q: Chromatography, Rf value, locating agent
4 min
Chapter 27
This lesson is not available for trial.
31 min
MCQ: Kinetic particle theory & Atomic structure
10 min
MCQ: Heating and cooling curves, effect of impurity on boiling point, others
6 min
MCQ: Sub-atomic particles, charges on ions, electronic configuration
7 min
MCQ: Charges on ions, isotopes, electronic configuration
5 min
MCQ: Trend in atomic and ionic radii of Group I metals
3 min
Chapter 28
This lesson is not available for trial.
42 min
MCQ: Chemical bonding
4 min
MCQ: Identifying ionic and covalent bonding, electrical conductivity, others
4 min
MCQ: Electrical conductivity, structure of SiO₂, effect of impurity on melting point, others
6 min
Structured Q: Dot-and-cross diagram, physical properties and electrical conductivity of dichlorine monoxide, others
8 min
Structured Q: Using structures to identify type of bonding
7 min
Application Q: Physical properties of allotropes of carbon, such as diamond and graphite
7 min
Structured Q: Using ionic charges to explain differences in melting point of MgO and NaCl
6 min
Chapter 29
This lesson is not available for trial.
52 min
MCQ: Mole concept
10 min
MCQ: Concentration calculations, limiting reagents, others
11 min
MCQ: Percentage by mass, empirical formula, limiting reagent, others
12 min
MCQ: Percentage yield, empirical formula
7 min
Structured Q: Empirical formula, balancing equation, effect of concentration on rate of reaction
6 min
Structured Q: Empirical formula, molecular formula, ionic equation, oxidation state
6 min
Chapter 30
This lesson is not available for trial.
40 min
MCQ: Chemical reactions
6 min
Structured Q: Properties of weak acids, suitability of indicators in titration, others
7 min
Structured Q: Identification of ions, test for nitrate ion, others
7 min
Structured Q: Properties and reactions of Period 3 oxides
7 min
Structured Q: Calculating oxidation states, use of oxidising and reducing agents
6 min
Structured Q: pH curve, choice of indicator, mole and concentration calculations
7 min