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100+ Free Cameroon GCE A-Level Chemistry Practice Questions

Prepare for the Cameroon General Certificate of Education Advanced Level Chemistry (Subject Code 0715) exam with instant access — no signup required.

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Key Facts: Cameroon GCE A-Level Chemistry Exam

0715

Official CGCEB Subject Code

Cameroon GCE Board

3 Papers

Compulsory Exam Papers (MCQ, Theory, Practical)

CGCEB Regulations

A to E

Official Passing Grade Range

Cameroon GCE Board

100

Free High-Yield Practice Questions

OpenExamPrep

Cameroon GCE A-Level Chemistry (0715) tests physical, inorganic, and organic chemistry through three papers: Paper 1 (50 compulsory MCQs, 1h30m), Paper 2 (theory and essays, 3h) and a separately scheduled laboratory practical. Passing grades range from A to E. This 100-question practice bank covers all core syllabus areas with step-by-step solutions.

Sample Cameroon GCE A-Level Chemistry Practice Questions

Try these sample questions to test your Cameroon GCE A-Level Chemistry exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1How many protons, neutrons, and electrons are present in a single iron(III) ion, 56Fe3+? (Atomic number of Fe = 26, Mass number = 56)
A.26 protons, 30 neutrons, 23 electrons
B.26 protons, 56 neutrons, 23 electrons
C.23 protons, 30 neutrons, 26 electrons
D.26 protons, 30 neutrons, 29 electrons
Explanation: The atomic number of iron is 26, which means it has 26 protons. The number of neutrons is the mass number minus the atomic number: 56 - 26 = 30 neutrons. Because the ion has a 3+ charge, it has lost 3 electrons relative to the neutral atom: 26 - 3 = 23 electrons.
2Naturally occurring copper consists of two stable isotopes: 63Cu (relative isotopic mass 62.93, abundance 69.17%) and 65Cu (relative isotopic mass 64.93, abundance 30.83%). What is the relative atomic mass (Ar) of copper to two decimal places?
A.63.93
B.63.55
C.64.31
D.64.00
Explanation: The relative atomic mass is the weighted average of the isotopic masses: Ar = (62.93 x 69.17 + 64.93 x 30.83) / 100 = (4352.87 + 2001.80) / 100 = 6354.67 / 100 = 63.55. This calculation accurately reflects the natural abundance ratio.
3What is the ground-state electronic configuration of a chromium atom (Cr, atomic number 24)?
A.[Ar] 3d4 4s2
B.[Ar] 3d6 4s0
C.[Ar] 3d5 4s1
D.[Ar] 4s2 4p4
Explanation: Chromium is an exception to the standard Aufbau filling rule. Promoting one 4s electron to the 3d subshell produces [Ar] 3d5 4s1, achieving the extra stability associated with a half-filled 3d subshell and minimized electron-electron repulsion.
4The first six successive ionization energies (in kJ mol^-1) for an unknown element X are: 738, 1450, 7730, 10540, 13630, 17995. In which group of the Periodic Table is element X located?
A.Group 1
B.Group 13 (Group 3)
C.Group 14 (Group 4)
D.Group 2
Explanation: There is a moderate increase between the 1st (738 kJ mol^-1) and 2nd (1450 kJ mol^-1) ionization energies, followed by a massive jump to the 3rd ionization energy (7730 kJ mol^-1, more than a 5-fold increase). This huge discontinuity indicates that the third electron is removed from a completely filled inner principal quantum shell, proving element X has 2 valence electrons and belongs to Group 2 (e.g., magnesium).
5The convergence limit of the Lyman series in the emission spectrum of atomic hydrogen occurs at a wavelength of 91.2 nm (9.12 x 10^-8 m). Given Planck's constant h = 6.63 x 10^-34 J s, speed of light c = 3.00 x 10^8 m s^-1, and Avogadro constant L = 6.02 x 10^23 mol^-1, what is the first ionization energy of hydrogen in kJ mol^-1?
A.1312 kJ mol^-1
B.218 kJ mol^-1
C.131.2 kJ mol^-1
D.798 kJ mol^-1
Explanation: Energy per photon at convergence limit E = hc / lambda = (6.63 x 10^-34 x 3.00 x 10^8) / (9.12 x 10^-8) = 2.181 x 10^-18 J per atom. Multiplying by Avogadro's constant gives the molar ionization energy: (2.181 x 10^-18 J) x (6.02 x 10^23 mol^-1) = 1.313 x 10^6 J mol^-1 = 1312 kJ mol^-1 (to 4 significant figures).
6According to VSEPR theory, what are the electron pair geometry, molecular geometry (shape), and approximate bond angles of xenon tetrafluoride (XeF4)?
A.Tetrahedral electron geometry, tetrahedral shape, 109.5°
B.Octahedral electron geometry, square planar shape, 90°
C.Trigonal bipyramidal electron geometry, see-saw shape, 90° and 120°
D.Octahedral electron geometry, square pyramidal shape, 88°
Explanation: The central xenon atom in XeF4 has 8 valence electrons, forming 4 single bonds with fluorine and retaining 2 non-bonding lone pairs (total 6 electron pairs -> octahedral arrangement). To minimize electron-electron repulsion, the two lone pairs occupy opposite axial positions (180° apart), resulting in a square planar molecular geometry with F-Xe-F bond angles of 90°.
7What is the hybridization of the central carbon atoms in ethane, ethene, and ethyne, respectively?
A.sp, sp2, sp3
B.sp2, sp3, sp
C.sp3, sp2, sp
D.sp3, sp, sp2
Explanation: In ethane (C2H6), each carbon forms 4 sigma bonds (tetrahedral, sp3). In ethene (C2H4), each carbon forms 3 sigma bonds and 1 pi bond (trigonal planar, sp2). In ethyne (C2H2), each carbon forms 2 sigma bonds and 2 pi bonds (linear, sp).
8Which of the following correctly lists the compounds ethanol (CH3CH2OH), methoxymethane (CH3OCH3), and propane (CH3CH2CH3) in order of increasing boiling point?
A.Ethanol < Methoxymethane < Propane
B.Methoxymethane < Propane < Ethanol
C.Propane < Ethanol < Methoxymethane
D.Propane < Methoxymethane < Ethanol
Explanation: All three molecules have similar relative molecular masses (~44 to 46 g mol^-1). Propane experiences only weak London dispersion forces (bp -42°C); methoxymethane has permanent dipole-dipole attractions in addition to London forces (bp -24°C); ethanol possesses intermolecular hydrogen bonding due to the polar O-H group (bp +78°C), leading to the highest boiling point.
9Why is cis-1,2-dichloroethene polar with a net dipole moment (mu > 0), whereas trans-1,2-dichloroethene is non-polar (mu = 0)?
A.In the trans isomer, the two opposing C-Cl bond dipole vectors cancel by inversion symmetry, while in the cis isomer they reinforce each other.
B.The C-Cl bonds in the cis isomer are ionic, whereas in the trans isomer they are covalent.
C.The cis isomer contains hydrogen bonds while the trans isomer cannot form hydrogen bonds.
D.The trans isomer has a completely delocalized pi electron cloud that neutralizes all partial charges.
Explanation: Both isomers have polar C-Cl bonds. In trans-1,2-dichloroethene, the two C-Cl bond dipoles point in exactly opposite directions in the same plane, canceling out completely to give a net dipole moment of zero. In cis-1,2-dichloroethene, the two C-Cl dipoles lie on the same side of the double bond, resulting in a non-zero vector sum and a permanent molecular dipole.
10A 0.587 g sample of an unknown volatile liquid was vaporized in a gas syringe at 100°C (373 K) and a pressure of 1.013 x 10^5 Pa (101.3 kPa). The vapor occupied a volume of 0.200 dm^3 (2.00 x 10^-4 m^3). Using the ideal gas equation (R = 8.314 J K^-1 mol^-1), what is the molar mass of the liquid?
A.45.0 g mol^-1
B.90.1 g mol^-1
C.180.2 g mol^-1
D.74.2 g mol^-1
Explanation: From pV = nRT = (m / M)RT, we rearrange for molar mass: M = mRT / (pV). Substituting values in SI units: M = (0.587 g x 8.314 J K^-1 mol^-1 x 373 K) / (1.013 x 10^5 Pa x 2.00 x 10^-4 m^3) = 1820.35 / 20.26 = 89.85 g mol^-1 ≈ 90.1 g mol^-1.

About the Cameroon GCE A-Level Chemistry Exam

The Cameroon GCE Advanced Level Chemistry (0715) examination evaluates candidates on advanced secondary chemistry competencies spanning physical, inorganic, and organic chemistry. Administered annually in May/June by the Cameroon GCE Board in Buea, the exam serves as the premier pre-university benchmark for entry into medical, engineering, pharmaceutical, and scientific faculties across Cameroon and internationally. Format note: this site's practice bank is 100 four-option multiple-choice questions covering the whole official syllabus. Paper 1 of the real examination is genuinely multiple choice (50 compulsory questions), so the format matches that paper, but the bank is a study aid only — it does not simulate the written theory/essay paper(s) or any practical examination, and its length does not describe the official exam.

Assessment

Official Advanced Level structure for subject code 0715 (Chemistry) per the Cameroon GCE Board June 2026 timetable (Form G6): Paper 1: 50 compulsory multiple-choice questions (1 hour 30 minutes); Paper 2: written theory/structured questions (3 hours); a separately scheduled practical examination (practical phase, 5–27 May 2026). Total written time is 4 hours 30 minutes. The Board does not publish per-paper mark weightings for individual subjects.

Time Limit

Paper 1: 1 hour 30 minutes; total written time 4 hours 30 minutes plus a separately scheduled practical examination.

Passing Score

Grade E or better (Cameroon GCE Advanced Level grades A, B, C, D and E are passes; O is a subsidiary pass and F is a fail)

Exam Fee

17,000 FCFA (Cameroon General Certificate of Education Board (CGCEB), Buea)

Cameroon GCE A-Level Chemistry Exam Content Outline

15%

Atomic Structure, Bonding and Intermolecular Forces

Subatomic particles, isotopes, electronic configurations, orbital hybridization (sp, sp2, sp3), VSEPR theory, bond polarities, dipole moments, London dispersion forces, dipole-dipole interactions, and hydrogen bonding.

15%

Chemical Energetics and Thermodynamics

Standard enthalpy changes (formation, combustion, neutralization, hydration, solution, atomization), Born-Haber cycles, lattice enthalpy, Hess's Law cycles, bond dissociation energies, entropy (S), and Gibbs free energy (ΔG = ΔH - TΔS) spontaneity predictions.

10%

Chemical and Ionic Equilibria

Dynamic equilibria, Le Chatelier's principle, equilibrium constants (Kc, Kp, relations between Kc and Kp), Bronsted-Lowry and Lewis acid-base theories, Ka, Kb, Kw, pH, pOH calculations, buffer solutions (Henderson-Hasselbalch), acid-base titrations, indicators, and solubility product (Ksp) with common ion effect.

10%

Reaction Kinetics and Electrochemistry

Rate equations, orders of reaction (0, 1, 2), rate constants (k), initial rate methods, half-life, Arrhenius equation and activation energy (Ea), reaction mechanisms, standard electrode potentials (E°), electrochemical cells, cell EMF calculations, Nernst equation, and Faraday's laws of electrolysis.

12%

Inorganic Periodicity and s-Block Elements

Period 3 trends in physical properties, atomic radii, ionization energies, electronegativity, structures, reactions of elements with oxygen, chlorine, and water, acid-base nature of Period 3 oxides and chlorides; Group 2 alkaline earth metal trends in reactivity, solubility of sulfates and hydroxides, and thermal stability of carbonates and nitrates.

13%

Halogens and Transition Metal Chemistry

Group 7/17 halogens, physical properties, relative oxidizing powers, displacement reactions, reactions with alkalis (disproportionation), hydrogen halides, silver halide tests; Transition metals (electronic configuration, variable oxidation states, complex ion formation, coordination numbers, ligand types, d-orbital splitting and color, catalytic behavior, and redox titrations).

15%

Fundamental Organic Chemistry and Hydrocarbons

Nomenclature, structural, geometric (cis/trans, E/Z), and optical isomerism (chirality), free radical substitution of alkanes, electrophilic addition to alkenes (Markovnikov's rule, carbocation stability), halogenoalkane nucleophilic substitution (SN1 vs SN2 mechanisms, kinetics, stereochemical outcomes), elimination reactions, alcohols (oxidation, dehydration), and phenols (acidity, electrophilic substitution).

10%

Carbonyls, Nitrogen Compounds, Polymers and Spectroscopy

Aldehydes and ketones (nucleophilic addition with HCN, NaBH4, 2,4-DNPH, Tollens, Fehling's, iodoform tests), carboxylic acids and derivatives (acyl chlorides, esters, amides, hydrolysis), amines and basicity, amino acids (zwitterions, peptide bonds), addition and condensation polymers, and analytical spectroscopy (IR diagnostic absorptions, 1H NMR chemical shifts/splitting, mass spectrometry fragmentation).

How to Pass the Cameroon GCE A-Level Chemistry Exam

What You Need to Know

  • Passing score: Grade E or better (Cameroon GCE Advanced Level grades A, B, C, D and E are passes; O is a subsidiary pass and F is a fail)
  • Assessment: Official Advanced Level structure for subject code 0715 (Chemistry) per the Cameroon GCE Board June 2026 timetable (Form G6): Paper 1: 50 compulsory multiple-choice questions (1 hour 30 minutes); Paper 2: written theory/structured questions (3 hours); a separately scheduled practical examination (practical phase, 5–27 May 2026). Total written time is 4 hours 30 minutes. The Board does not publish per-paper mark weightings for individual subjects.
  • Time limit: Paper 1: 1 hour 30 minutes; total written time 4 hours 30 minutes plus a separately scheduled practical examination.
  • Exam fee: 17,000 FCFA

Keys to Passing

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

Cameroon GCE A-Level Chemistry Study Tips from Top Performers

1Master quantitative physical chemistry calculations: practice equilibrium constants (Kc, Kp), pH and buffer solutions, thermodynamics (ΔG, ΔH, ΔS, Born-Haber cycles), and Faraday's laws under timed conditions.
2Memorize key organic reaction mechanisms: draw curly-arrow mechanisms for SN1, SN2, electrophilic addition to alkenes, electrophilic aromatic substitution of benzene, and nucleophilic addition to carbonyls regularly.
3Understand inorganic periodic trends rather than memorizing isolated facts: explain variations in ionization energy, oxide acidity, halide reactivity, and transition metal complex stability using nuclear charge, shielding, and electronic configurations.
4Review qualitative analysis and laboratory practical techniques: study salt analysis tests, redox titration calculations (KMnO4 and Na2S2O3/I2), and enthalpy calorimetry equations for Paper 3 preparation.

Frequently Asked Questions

What is the subject code and structure of Cameroon GCE A-Level Chemistry?

The subject code is 0715. The examination consists of three compulsory papers: Paper 1 (50 multiple-choice questions, 1h 30m), Paper 2 (theory structured questions and essays, 3h), and a separately scheduled laboratory practical examination.

How is the Cameroon GCE Advanced Level Chemistry graded?

Cameroon GCE A-Level subjects are graded on a scale of A, B, C, D, E (Passing grades), O (Subsidiary pass at O-Level standard), and F (Fail). Grade A represents the highest grade, while Grade E represents the minimum passing grade.

What are the total examination fees for Cameroon GCE A-Level Chemistry?

Registration includes a base candidate fee of 9,000 FCFA, a subject fee of 2,000 FCFA, a practical examination fee of 5,000 FCFA for science subjects with practicals, and 1,000 FCFA for the G3 registration booklet, totaling approximately 17,000 FCFA.

Is a scientific calculator allowed in the Cameroon GCE A-Level Chemistry examination?

Yes, standard non-programmable scientific calculators are permitted in all three papers (Paper 1, Paper 2, and Paper 3). A data booklet containing the Periodic Table, standard reduction potentials, and fundamental constants is provided during the examinations.

How should I allocate study time across the three main chemistry branches?

The CGCEB 0715 syllabus allocates roughly 40% to Physical Chemistry, 25% to Inorganic Chemistry, and 35% to Organic Chemistry. Focus on mastering quantitative calculations in physical chemistry, mechanism flowcharts in organic chemistry, and trend explanations in inorganic chemistry.