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Contents
Metals
Metals
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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
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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
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Chapter 3
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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
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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
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Chapter 5
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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
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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
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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
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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
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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
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Chapter 10
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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
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Chapter 11
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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
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Chapter 12
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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
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34 min
Reducing air pollution - catalytic converters and flue gas desulfurisation
4 min
MCQ: Which method(s) can be used to reduce carbon dioxide emissions...
3 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
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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
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Chapter 15
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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
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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
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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
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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
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Chapter 19
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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
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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
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Chapter 21
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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
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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
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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
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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
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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.
56 min
MCQ: Experimental chemistry
10 min
MCQ: gas collection, porous pot experiment, upward delivery of gases
8 min
MCQ: Separation techniques, salt solubility table
7 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
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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
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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