Top 10 Chemistry Topics That Always Appear in JAMB

March 2026 · 7 min read · By Nkuzify Edu Concepts

Chemistry is one of the most important JAMB subjects for Science candidates. After analysing over 10 years of JAMB Chemistry past questions, these are the 10 topics that appear most frequently and carry the most marks. Master these and you are well on your way to a strong Chemistry score.

1. Organic Chemistry — Hydrocarbons and Functional Groups

Organic Chemistry consistently accounts for 30 to 40 percent of JAMB Chemistry questions. Most tested: alkanes, alkenes, alkynes (properties, reactions, uses), functional groups (alcohols, carboxylic acids, esters, aldehydes, ketones), and IUPAC nomenclature. If you master nothing else in Chemistry, master organic chemistry.

2. Atomic Structure and Periodicity

Electron configuration, orbital notation, quantum numbers, and periodic trends — atomic radius, ionization energy, electronegativity — appear in almost every JAMB paper. Know the periodic table well: which elements are in which groups, their properties, and how trends change across periods and down groups.

3. Chemical Bonding

Ionic, covalent, metallic, and hydrogen bonding. Pay special attention to Lewis structures, bond angles, molecular shapes (VSEPR theory), and the relationship between bonding type and physical properties like melting point and solubility.

4. Mole Concept and Stoichiometry

Calculations involving moles, molar mass, Avogadro's number, percentage composition, empirical and molecular formulas, and stoichiometric ratios appear in every single JAMB Chemistry paper. These questions require practice — you cannot understand them by reading alone.

5. Chemical Equilibrium and Le Chatelier's Principle

The meaning of equilibrium, Kc and Kp expressions, Le Chatelier's principle (what happens when temperature, pressure, or concentration changes), and the Haber process as a real-world application. JAMB consistently tests these concepts every year.

6. Acids, Bases, and Salts

Arrhenius, Brønsted-Lowry, and Lewis definitions. pH calculations. Titration — identifying the equivalence point and calculating concentrations. Buffer solutions. Preparation of salts by different methods. All high-frequency JAMB topics.

7. Electrochemistry

Electrolysis — what is discharged at the anode and cathode, Faraday's laws of electrolysis, applications like electroplating and extraction of metals. Galvanic cells and standard electrode potentials appear regularly in recent papers.

8. Rates of Reaction

Factors affecting reaction rate (concentration, temperature, surface area, catalysts), collision theory, activation energy. JAMB loves graphical questions on reaction rate — practice interpreting rate-time and concentration-time graphs.

9. Gases and the Gas Laws

Boyle's Law, Charles' Law, the ideal gas equation (PV = nRT), and Dalton's Law of partial pressures. Calculations using gas laws appear frequently, as do questions on kinetic molecular theory and deviations from ideal behaviour.

10. Environmental Chemistry and Industrial Processes

The Haber process (ammonia), Contact process (sulfuric acid), industrial production of chlorine and sodium hydroxide via electrolysis. Air and water pollution — causes, effects, prevention — also appear regularly.