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Revision help links for WJEC AS Level Chemistry

 Doc Brown's Advanced Level Chemistry

WJEC Welsh Advanced Subsidiary GCE AS Level CHEMISTRY course

Syllabus-specification A2 Chemistry Unit CH1 Topic 1.1 Basic ideas on atoms * Topic 1.2 Chemical Calculations * 2.2 Chemical equilibrium and acid-base reactions * 2.2 Energetics * 2.3 Kinetics * 3: Application of Unit 1 principles to problems encountered in production of chemicals & energy * Unit CH2 Topic 4.1 Chemical Bonding * 4.2 Forces between molecules * 4.3 Shapes of molecules * 4.4 Solubility of compounds in water * 5 Solid Structures * 6.1 The Periodic Table * 6.2 Trends in properties of elements of s-block and Group 7 (17) * 7.1 Organic compounds and their reactions * 7.2 Hydrocarbons * 7.3 Halogenoalkanes * 7.4 Alcohols for My unofficial support for this WJEC GCE AS Advanced Level Chemistry syllabus-Specification * Scroll down and each module, topic or unit is linked to potentially useful sections on this site [Each link opens up in a new window] [PAST PAPERS] [ALL LINKS SHOULD WORK IF THIS PAGE IS SAVED]

(c) doc b WJEC A2 chemistry (extra topics) * (c) doc b WJEC GCSE science-CHEMISTRY

 READ CAREFULLY  My 'A level' chemistry revision notes are far from complete BUT by clicking on the links for [ORGANIC], [INORGANIC], [PHYSICAL-THEORETICAL] and [useful UK based GCSE/ revision notes] you should find things to help on a particular topic.  By following a link you will find some useful information and use the sub-indexes of key words or headings at the top of each page. To return to this page click on the <== back on the browser link bar. All the syllabus-topic-unit titles are taken from the official syllabus. I do not have time to deliver extended responses to email questions BUT I have provided a convenient list of links to PAST WJEC Advanced Level Chemistry PAPERS.

 

WJEC GCE Subsidiary Chemistry Summary of AS Units and Contents Links

Unit CH1 Controlling and Using Chemical Changes:

(in order to make things, produce energy and solve environmental problems).. .. TOPIC 1 Topic 1.1 Basic ideas on atoms * Topic 1.2 Chemical Calculations

TOPIC 2 2.2 Chemical equilibrium and acid-base reactions * 2.2 Energetics * 2.3 Kinetics.. .. TOPIC 3: Application of Unit 1 principles to problems encountered in production of chemicals & energy.. .. Unit CH2 Properties, Structure and bonding:.. .. TOPIC 4 4.1 Chemical Bonding * 4.2 Forces between molecules * 4.3 Shapes of molecules

4.4 Solubility of compounds in water * Topic 5 Solid Structures

Topic 6 6.1 The Periodic Table * 6.2 Trends in properties of elements of s-block and Group 7 (17)

Topic 7 7.1 Organic compounds and their reactions * 7.2 Hydrocarbons

7.3 Halogenoalkanes * 7.4 Alcohols * Topic 8 Analytical Techniques

 

Unit CH1 Controlling and Using Chemical Changes

(in order to make things, produce energy and solve environmental problems)

 

TOPIC 1

Topic 1.1 Basic ideas on atoms (WJEC GCE AS Chemistry CH1)

  1. GCSE Atomic Structure Notes

  2. Radioactivity and Nuclear Power - The structure of atoms linked to the properties and uses of alpha, beta and gamma radiation, radioisotope dating, half-life.  Sub-index and keywords at top of page

  3. Radioactivity and nuclear processes multiple choice Quiz Covers everything for A level chemistry

  4. Periodic Table Advanced Inorganic Chemistry Notes Part 2 "Electronic Structure and Ionisation Energies" - Electron arrangements - electron configurations and the Periodic Table - s, p, d and f blocks - ionization energy patterns, section on hydrogen spectrum and emission spectroscopy (3 linked pages)

 

Topic 1.2 Chemical Calculations (WJEC GCE AS Chemistry CH1)

  1. GCSE Atomic Structure Notes including mass spectrometry of elements - the structure of atoms, isotopes, nuclear structure notation, 'simple' electronic structure and the Periodic Table and mass spectrometry for isotope analysis and calculation of relative atomic mass (Ar) and measurement of molecular mass (Mass spectrometry is on a sub-page)

  2. Chemical Calculations index - 1. to 16. sections of explanation-examples and multiple choice and type in answer quizzes links are built into the notes, designed up to higher GCSE and basic GCE-AS/IB calculations

  3. section 1. Relative atomic mass (Ar) and isotopic mass

  4. section 2. Relative formula mass and relative molecular mass (Mr)

  5. section 3. Law of Conservation of Mass and simple reacting mass calculations

  6. section 4. % composition by mass of a compound

  7. section 5. Empirical formula from reacting masses

  8. section 6. Reacting masses of reactants and products and actual percent % yield, theoretical yield and atom economy

  9. section 7. Introducing moles - the connection of moles, mass and formula mass

  10. (c) doc b section 8. Using moles to deduce empirical/molecular formula of a compound/molecule starting with reacting masses or % composition by mass

  11. section 9. moles and molar gas volume and Avogadro's Law

  12. section 14. % actual and theoretical yield, dilution calculations, atom economy, volumetric titration apparatus, water of crystallisation, how much of reactants are needed? (sub-index near top of page)

 

TOPIC 2

Topic 2.1 Chemical equilibrium and acid-base reactions (WJEC GCE AS Chemistry CH1)

  1.  Starter GCSE Notes on reversible reactions, equilibrium, ammonia synthesis

  2. Advanced Chemistry Equilibria Part 1. Dynamic molecular equilibrium and Le Chatelier's principle

  3. GCSE Notes on Acids, Bases, Alkalis, pH, Neutralisation and Salts - includes theory, lots of formulae and word and balanced symbol equations, salt preparations and equations.

  4. GCSE Aqueous Chemistry Notes - more on acid-base theory Sub-index at top of page

  5. section 11. Making up solutions - concentration & molarity

  6. section 12. Volumetric acid-alkali titration easy calculations - apparatus/analysis

  7. Structured Question worksheet including acid-base volumetric titration calculations (worked out answers included!)

 

Topic 2.2 Energetics (WJEC GCE AS Chemistry CH1)

  1. Basic notes of exothermic and endothermic reactions and calculation of enthalpy changes from 'simple' calorimetry experiments and resulting data

  2. GCSE Multiple choice quiz on Energy Changes in Chemical Reactions

  3. Thermodynamics Part 1: Thermochemistry - Calorimetry experiments - Enthalpies of reaction, formation, combustion and bond dissociation are explained with exemplar calculations (6 linked pages and their sub-index)

  4. click me! Enthalpy and Bond Energy Calculation Questions  (worked out answers included!)

 

Topic 2.3 Kinetics (WJEC GCE AS Chemistry CH1)

  1. GCSE Notes for the basics of rates of reactions - kinetics

  2. KINETICS - advanced rates of reactions revision notes: temperature effect and activation energy, homogeneous catalysts and heterogeneous catalysts, obtaining data (does include more than you need for WJEC CH1)

  3. Extra GCSE Industrial Chemistry Notes - section 2. on enzymes (keyword alphabetical index near top of the page)

 

Topic 3 Application of the principles studied in Unit 1 to problems encountered in the production of chemicals and energy

  1. Equilibria Part 3 equilibrium and industrial processes (can ignore the Kp/Kc equilibrium expressions and concentrate on the application of Le Chatelier's Principle to industrial processes)

  2. Extra GCSE Industrial Chemistry Notes - section 2. on enzymes (keyword alphabetical index near top of the page)

  3. Ammonia synthesis, reversible reactions and chemical equilibrium notes - including reversible reactions, equilibrium theory, nitric acid manufacture, reactions of ammonia and ammonium salts, fertiliser ammonium salt preparation, problems with over-use or fertilisers.

 

Unit CH2 Properties, Structure and bonding

 

TOPIC 4

 

Topic 4.1 Chemical Bonding (WJEC GCE AS Chemistry CH2)

  1. Introduction to BONDING

  2. Revision notes on the basics of Ionic BONDING and an ionic lattice

  3. Revision notes on the basics of Covalent BONDING and small molecules and their properties

  4. Revision notes on Inorganic redox reactions - Part 1 includes introduction to electronegativity

 

Topic 4.2 Forces between molecules (WJEC GCE AS Chemistry CH2)

  1. Revision notes on the basics of Covalent BONDING and small molecules and intermolecular forces

  2. Equilibria Part 8 includes discussion of organic molecule examples - bond polarity, boiling point and intermolecular forces and includes boiling point plots and discussion of bond polarity effects

 

Topic 4.3 Shapes of molecules (WJEC GCE AS Chemistry CH2)

  1. Revision notes on shapes and bond angles of simple molecules (VSEPR), ions, transition metal complexes and a section on shape and bond angles in organic molecules

  2. Evidence and theory for hydrogen bonding in simple covalent hydrides

  3. Solubility of covalent compounds, miscible and immiscible - mention of hydrogen bonding effects

 

Topic 4.4 Solubility of compounds in water (WJEC GCE AS Chemistry CH2)

  1. Water and solubility curves for salts that form aqueous solutions

  2. Solubility of covalent compounds, miscible and immiscible liquids

 

TOPIC 5

 

Topic 5 Solid Structures (WJEC GCE AS Chemistry CH2)

  1. Revision notes on the basics of Ionic BONDING and an ionic lattice

  2. Revision notes on the basics of Covalent BONDING and giant structures and their properties and uses

  3. Revision notes on the basics of Metallic BONDING, properties and uses of metals

 

TOPIC 6

 

Topic 6.1 The Periodic Table (WJEC GCE AS Chemistry CH2)

  1. GCSE Summary notes of the Periodic Table - A basic introduction: Explanation and overview of Groups, Periods, Series etc. with links to more detailed notes on the Group 1 Alkali Metals, Group 7 Halogens, Group 0 Noble Gases and Transition Metals.

  2. Periodic Table Advanced Inorganic Chemistry Notes Part 1 "Historical Introduction" and the full modern periodic table

  3. Periodic Table Advanced Inorganic Chemistry Notes Part 2 "Electronic Structure and Ionisation Energies" - Electron arrangements - electron configurations and the Periodic Table - s, p, d and f blocks

  4. Periodic Table Notes Part 11: Compiled tables of data on Groups 1-7,0 and 3d-block-Transition Metals

  5. click me! Data-periodicity graphs for elements Z = 1 to 20 = Period 1, Period 2, Period 3 and start of Period 4

  6.  periodicity graph for elements Z = 1 to 38 = Period 1, Period 2, Period 3, Period 4 and start of Period 5

  7. The Reactivity Series of Metals, Corrosion and includes a simplified introduction to Redox Reaction

  8. Revision notes on Inorganic redox reactions - Part 1 includes introduction to electronegativity, explaining oxidation and reduction reactions and oxidation state/oxidation number changes

 

Topic 6.2 Trends in properties of the elements of the s-block and Group 7 (17)

  1. Group 1 The Alkali Metals Notes - Tabulated element data for lithium, sodium and potassium etc., physical and chemical properties of the metals, group trends, reactions with water, oxygen and chlorine, theory of group reactivity trend, compound formulae, uses of metals and compounds.

  2. Periodic Table: detailed Advanced Inorganic Chemistry Notes Part 7 Group 1 Alkali Metals and Group 2 Alkaline Earth Metals - detailed Advanced Level revision notes

  3. Multiple choice Quiz on Group 1 Alkali Metals and Group 2 Alkaline Earth Metals (easy start!)

  4. Qualitative Analysis: Chemical Identity Tests - anions e.g. non-metal negative ions (keyword alphabetical index at top of page)

  5. Qualitative Analysis: Chemical Identity Tests - cations e.g. positive metal ions (keyword alphabetical index at top of page)

  6. Part 9 p-block Group 7/17 The Halogens (9 linked pages, use sub-index for sections 9.1 to 9.12 to find what you need)

 

TOPIC 7

 

Topic 7.1 Organic compounds and their reactions (WJEC GCE AS Chemistry CH2)

  1. Extra GCSE Organic Chemistry Notes - Alkane & alkene homologous series 'families', alcohols like ethanol, other organic molecule families e.g. carboxylic acids, esters, polymers, natural molecules - carbohydrates, sugars, amino acids, proteins and cooking, natural fats & oils, hydrogenation of fats, soaps, Vitamin C, Drugs-analgesics, Food Additives and CFC's, Ozone layer and free radicals. Use sub-index and keyword list at top of page and can be read as a basic introductory view of what 'organic chemistry' is all about without the need for too many concepts!

  2. A summary of homologous series, functional group names and structure in Organic Chemistry (look for 'general formulae' and links to organic molecular structure and nomenclature/naming pages)

  3.  Organic Chemistry ISOMERISM general definition (use sub-index at top of page)

  4.  Organic Chemistry (1) STRUCTURAL ISOMERISM general definition (use sub-index at top of page)

  5.  Organic Chemistry (1a) Chain isomerism (use sub-index at top of page)

  6.  Organic Chemistry (1a) Chain isomerism (Ex 1a.1 discusses alkane isomers, intermolecular forces and boiling point)

  7.  Organic Chemistry (1b) Positional isomerism (use sub-index at top of page)

  8.  Organic Chemistry (1c) Functional group isomerism (use sub-index at top of page)

  9.  Organic Chemistry (2) STEREOISOMERISM general definition (use sub-index at top of page)

  10.  Organic Chemistry (2a) E/Z isomerism (was called cis/trans Geometrical Isomerism (use sub-index at top of page)

  11. Equilibria Part 8 has a section on intermolecular forces - bond polarity, boiling point using organic molecules as examples

  12. (c) doc b section 8. Using moles to deduce empirical/molecular formula of a compound/molecule starting with reacting masses or % composition by mass

  13. Organic synthesis redox reactions - including oxidation of alcohols (use top summary table index)

  14.  MECHANISM Introduction and terms used in organic chemistry (on the mechanism pages the type of reaction, basic reaction equations and conditions are quoted which may act as a suitable reference, there is also a reaction index on each page)

  15. Qualitative Analysis: Tests for organic functional groups notes (use alphabetical index for homologous series, reagents etc.) (alphabetical keyword index at top of page)

 

Topic 7.2 Hydrocarbons (WJEC GCE AS Chemistry CH2)

  1. GCSE notes on Oil and useful products - The hydrocarbons from oil and their uses e.g. fuels-combustion, cracking to make alkenes, simple addition reactions of alkenes (bromine, hydrogen) and test for alkenes, polymers/uses of plastics, fossil fuels and environmental problems etc. See also Alternative and Fossil Fuel Survey and Global warming discussion page.

  2. Revision notes on the structure & naming (nomenclature) of ALKANES (and cycloalkanes) notes, including nomenclature of isomers

  3. Multiple choice Quiz on the structure and naming (nomenclature) of alkanes

  4. Type in name Quiz on the structure & naming of ALKANES (and nomenclature of cycloalkanes)

  5. Quiz on aspects of "Development of Fuels"

  6. Quiz on aspects of the Petrochemical Industry

  7. Alternative and Fossil Fuel Survey

  8. Gas Preparation Ex 10 Laboratory paraffin cracking experiment

  9. Revision notes on the structure & naming (nomenclature) of ALKENES (and cycloalkanes) notes, including nomenclature of isomers

  10. Multiple choice Quiz on the Structure and naming (nomenclature) of ALKENES

  11. Type in name Quiz on the nomenclature of ALKENES

  12.  MECHANISM Introduction and terms used in organic chemistry (on the mechanism pages the type of reaction, basic reaction equations and conditions are quoted which may act as a suitable reference, there is also a reaction index on each page)

  13.  Mechanism of the free radical chlorination/bromination of alkanes to make halogenoalkanes

  14.  Mechanism of electrophilic addition of hydrogen bromide to alkenes to make bromoalkanes (introduction and example of electrophilic addition to alkenes) (includes reagents, reaction conditions and exemplar balanced equations showing product formation even if you don't need all the mechanistic details)

  15.  Mechanism of electrophilic addition of bromine to alkenes with pure bromine to make dibromoalkanes  (includes reagents, reaction conditions and exemplar balanced equations showing product formation even if you don't need all the mechanistic details)

  16.  Mechanism: Halogenoalkanes (haloalkanes, alkyl halides) Elimination of hydrogen bromide to give an alkene (mechanism NOT needed but includes reagents, reaction conditions and exemplar balanced equations showing product formation even if you don't need all the mechanistic details)

Alkanes and Petrochemical Industry INDEX

1.1 The Molecular Structure and Nomenclature of Alkanes

1.2 Fractional distillation of crude oil and uses of products

1.3 Modification of alkanes by cracking, isomerisation and reforming

1.4 Complete and incomplete combustion of alkanes and environmental pollution

1.5 Modification of hydrocarbon fuel mixtures and alternative fuels

1.6 Chlorination and bromination of alkanes, reaction mechanisms and uses of products

 

Topic 7.3 Halogenoalkanes (WJEC GCE AS Chemistry CH2)

  1.  Mechanism of the free radical chlorination/bromination of alkanes to make halogenoalkanes

  2. Revision notes on the structure and naming of HALOGENOALKANES/HALOALKANES and classification into primary (prim)/secondary (sec)/tertiary (tert) (including nomenclature of many isomers

  3. Multiple choice Quiz on the structure and naming (nomenclature) of HALOGENOALKANES (haloalkanes)

  4. Type in name Quiz on the nomenclature of HALOGENOALKANES (haloalkanes)

  5. Extra GCSE Organic Chemistry Notes - section 7. on CFC's, Ozone layer and free radicals

  6.  Mechanism: Halogenoalkanes (haloalkanes/alkyl halides) Nucleophilic substitution by water/hydroxide ion [SN1 or SN2, hydrolysis to alcohol] (introduction to, and example of, nucleophilic substitution in halogenoalkanes) (includes reagents, reaction conditions and exemplar balanced equations showing product formation even if you don't need all the mechanistic details)

 

Topic 7.4 Alcohols (WJEC GCE AS Chemistry CH2)

  1. Revision notes on the structure and naming (nomenclature) of aliphatic ALCOHOLS - Classification into primary (prim), secondary (sec) and tertiary (tert) - notes include isomers and other related compounds which may not be needed

  2. Multiple choice Quiz on the structure and naming (nomenclature) of aliphatic ALCOHOLS (includes ethers which may not be needed)

  3. Type in name Quiz on the nomenclature of aliphatic ALCOHOLS (includes ethers which may not be needed)

  4. GCSE Organic Chemistry Notes - introductory section on alcohols like ethanol

  5.  Mechanism: Halogenoalkanes (haloalkanes, alkyl halides) Elimination of hydrogen bromide to give an alkene (mechanism NOT needed but includes reagents, reaction conditions and exemplar balanced equations showing product formation)

  6. Organic synthesis redox reactions - including oxidation of alcohols (use top summary table index)

 

Topic 8 Analytical Techniques (WJEC GCE AS Chemistry CH2)

  1. -

CHEMISTRY : ANALYSING/MOLECULES CH4 - GCE WINTER 2012 - QUESTION PAPER CHEMISTRY : CHEMICAL CHANGE CH1:NEW SPEC - GCE WINTER 2012 - QUESTION PAPER CHEMISTRY : PROP./STRUCT./BOND CH2 - GCE WINTER 2012 - QUESTION PAPER CHEMISTRY : ANALYSING/MOLECULES CH4 - GCE SUMMER 2011 - QUESTION PAPER.. CHEMISTRY : CHEMICAL CHANGE CH1:NEW SPEC - GCE SUMMER 2011 - QUESTION PAPER.. CHEMISTRY : PROP./STRUCT./BOND CH2 - NEW SPEC - GCE SUMMER 2011 - QUESTION PAPER.. CHEMISTRY :PHYSICAL & INORGANIC CH5 - GCE SUMMER 2011 - QUESTION PAPER.. CHEMISTRY : ANALYSING/MOLECULES CH4 - GCE WINTER 2011 - QUESTION PAPER.. CHEMISTRY : CHEMICAL CHANGE CH1:NEW SPEC - GCE WINTER 2011 - QUESTION PAPER.. CHEMISTRY : PROP./STRUCT./BOND CH2 - GCE WINTER 2011 - QUESTION PAPER.. CHEMISTRY : ANALYSING/MOLECULES CH4 - GCE SUMMER 2010 - QUESTION PAPER.. CHEMISTRY : CHEMICAL CHANGE CH1:NEW SPEC - GCE SUMMER 2010 - QUESTION PAPER.. CHEMISTRY : PROP./STRUCT./BOND CH2 - NEW SPEC - GCE SUMMER 2010 - QUESTION PAPER.. CHEMISTRY :PHYSICAL & INORGANIC CH5 - GCE SUMMER 2010 - QUESTION PAPER.. NEW EXAMINATION SPECIFICATION PAST PAPERS .. CHEMISTRY : ANALYSING/MOLECULES CH4 - GCE WINTER 2010 - QUESTION PAPER.. CHEMISTRY : CHEMICAL CHANGE CH1:NEW SPEC - GCE WINTER 2010 - QUESTION PAPER.. CHEMISTRY : PROP./STRUCT./BOND CH2 - GCE WINTER 2010 - QUESTION PAPER.. CHEMISTRY CH4 - GCE WINTER 2010 - QUESTION PAPER.. CHEMISTRY CH5 - GCE WINTER 2010 - QUESTION PAPER.. CHEMISTRY CH6 CH6A - GCE WINTER 2010 - QUESTION PAPER.. CHEMISTRY : CHEMICAL CHANGE CH1:NEW SPEC - GCE SUMMER 2009 - QUESTION PAPER.. CHEMISTRY : PROP./STRUCT./BOND CH2 - NEW SPEC - GCE SUMMER 2009 - QUESTION PAPER.. CHEMISTRY CH1 - GCE SUMMER 2009 - QUESTION PAPER.. CHEMISTRY CH2 - GCE SUMMER 2009 - QUESTION PAPER.. CHEMISTRY CH3 A - GCE SUMMER 2009 - QUESTION PAPER.. CHEMISTRY CH4 - GCE SUMMER 2009 - QUESTION PAPER.. CHEMISTRY CH5 - GCE SUMMER 2009 - QUESTION PAPER.. CHEMISTRY CH6 A - GCE SUMMER 2009 - QUESTION PAPER.. CHEMISTRY : CHEMICAL CHANGE CH1:NEW SPEC - GCE WINTER 2009 - QUESTION PAPER.. PAST PAPERS of the OLD syllabus.. Arranged by 'season'.. CHEMISTRY CH1 - GCE WINTER 2009 - QUESTION PAPER.. CHEMISTRY CH2 - GCE WINTER 2009 - QUESTION PAPER.. CHEMISTRY CH4 - GCE WINTER 2009 - QUESTION PAPER.. CHEMISTRY CH1 - GCE SUMMER 2008 - QUESTION PAPER.. CHEMISTRY CH2 - GCE SUMMER 2008 - QUESTION PAPER.. CHEMISTRY CH3 A - GCE SUMMER 2008 - QUESTION PAPER.. CHEMISTRY CH4 - GCE SUMMER 2008 - QUESTION PAPER.. CHEMISTRY CH5 - GCE SUMMER 2008 - QUESTION PAPER.. CHEMISTRY CH6 A - GCE SUMMER 2008 - QUESTION PAPER.. CHEMISTRY CH1 - GCE WINTER 2008 - QUESTION PAPER.. CHEMISTRY CH2 - GCE WINTER 2008 - QUESTION PAPER.. CHEMISTRY CH4 - GCE WINTER 2008 - QUESTION PAPER.. Arranged by unit.. CH1.. CHEMISTRY CH1 - GCE SUMMER 2006 - QUESTION PAPER.. CHEMISTRY CH1 - GCE SUMMER 2007 - QUESTION PAPER.. CHEMISTRY CH1 - GCE SUMMER 2008 - QUESTION PAPER.. CHEMISTRY CH1 - GCE WINTER 2006 - QUESTION PAPER.. CHEMISTRY CH1 - GCE WINTER 2007 - QUESTION PAPER.. CHEMISTRY CH1 - GCE WINTER 2008 - QUESTION PAPER.. CHEMISTRY CH1 - GCE WINTER 2009 - QUESTION PAPER.. CH2.. CHEMISTRY CH2 - GCE SUMMER 2006 - QUESTION PAPER.. CHEMISTRY CH2 - GCE SUMMER 2007 - QUESTION PAPER.. CHEMISTRY CH2 - GCE SUMMER 2008 - QUESTION PAPER .. CHEMISTRY CH2 - GCE WINTER 2006 - QUESTION PAPER.. CHEMISTRY CH2 - GCE WINTER 2007 - QUESTION PAPER.. CHEMISTRY CH2 - GCE WINTER 2008 - QUESTION PAPER.. CHEMISTRY CH2 - GCE WINTER 2009 - QUESTION PAPER.. CH3.. CHEMISTRY CH3 A - GCE SUMMER 2006 - QUESTION PAPER.. CHEMISTRY CH3 A - GCE SUMMER 2007 - QUESTION PAPER.. CHEMISTRY CH3 A - GCE SUMMER 2008 - QUESTION PAPER.. CH4.. CHEMISTRY CH4 - GCE SUMMER 2006 - QUESTION PAPER.. CHEMISTRY CH4 - GCE SUMMER 2007 - QUESTION PAPER .. CHEMISTRY CH4 - GCE SUMMER 2008 - QUESTION PAPER.. CHEMISTRY CH4 - GCE WINTER 2006 - QUESTION PAPER.. CHEMISTRY CH4 - GCE WINTER 2007 - QUESTION PAPER.. CHEMISTRY CH4 - GCE WINTER 2008 - QUESTION PAPER.. CHEMISTRY CH4 - GCE WINTER 2009 - QUESTION PAPER.. CH5.. CHEMISTRY CH5 - GCE SUMMER 2006 - QUESTION PAPER.. CHEMISTRY CH5 - GCE SUMMER 2007 - QUESTION PAPER.. CHEMISTRY CH5 - GCE SUMMER 2008 - QUESTION PAPER.. CH6.. CHEMISTRY CH6 A - GCE SUMMER 2006 - QUESTION PAPER.. CHEMISTRY CH6 A - GCE SUMMER 2007 - QUESTION PAPER .. CHEMISTRY CH6 A - GCE SUMMER 2008 - QUESTION PAPER

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