Key Points in Chemistry for JAMB 2026/2027:- If there is one science subject that can either push your JAMB score up or drag it down, it is Chemistry. Many candidates fear it because of calculations, some ignore it because of formulas, but the wise ones understand something simple. JAMB Chemistry is not difficult. It only requires the right key points, steady practice, and a good understanding of repeated topics. Once you know the major areas JAMB tests every year, scoring above 70 becomes very possible.
This guide contains the most important JAMB Chemistry Key Points, simple explanations, and a full set of 60 Chemistry Questions and Answers. If you study this guide carefully, your confidence in Chemistry will increase quickly.
Key Points in Chemistry for JAMB 2026/2027 Important
Key Points in Chemistry for JAMB 2026/2027 is important because: Chemistry is compulsory for all science students, It is required for courses like Medicine, Nursing, Pharmacy, Engineering, and Agriculture, It contains both theory and calculations, It influences your total JAMB score greatly, It is one of the easiest subjects to improve with formula-based practice
If you want a high score, Chemistry must be one of your strongest subjects.
Key Topics in Chemistry for JAMB 2026/2027
1. Basic Concepts in Chemistry
- Know the difference between atom, molecule, ion, and compound
- Understand elements, mixtures, and compounds
- Study Dalton’s Atomic Theory
- Learn laws of chemical combination
- Understand empirical and molecular formulas
- Master Avogadro’s number and molar calculations
2. Periodic Table and Periodicity
- Learn periodic trends: atomic radius, ionization energy, electronegativity
- Know the groups and periods
- Understand properties of alkali metals, halogens, and noble gases
- Study transition metals and their unique behaviors
- Understand oxidation states and variable valency
3. Chemical Bonding
- Know types of bonding: ionic, covalent, metallic
- Learn hydrogen bonding
- Understand bond polarity
- Know differences between sigma and pi bonds
- Study shapes of molecules (VSEPR theory)
4. States of Matter and Gas Laws
- Know gas laws: Boyle, Charles, Gay-Lussac
- Understand ideal gas equation PV = nRT
- Learn kinetic theory of gases
- Study diffusion and effusion (Graham’s law)
- Understand phase changes: sublimation, condensation, freezing
5. Stoichiometry
- Understand mole concept
- Balance chemical equations
- Do mole-to-mass and mass-to-volume calculations
- Understand limiting reagents
- Calculate percentage purity and yield
6. Acids, Bases, and Salts
- Know Arrhenius, Bronsted-Lowry, and Lewis definitions
- Understand pH and pOH
- Learn strong and weak acids and bases
- Know how to prepare salts
- Understand neutralization reactions
7. Organic Chemistry
- Know homologous series
- Learn alkanes, alkenes, alkynes
- Study aromatic compounds
- Understand functional groups
- Learn isomerism
- Study crude oil and fractional distillation
8. Electrochemistry
- Know oxidation and reduction
- Study redox reactions
- Understand electrolytes and non-electrolytes
- Learn electrolysis of common compounds
- Study electrochemical cells
Areas JAMB Repeats Every Year/JAMB Areas of Concentration
- Atomic structure
- Calculations with mole concept
- Gas laws
- Solubility and salt preparation
- Organic reactions
- Periodic table trends
- Electrolysis
- Acids, bases, and salts
- Crude oil
- Redox reactions
ALSO READ: Key Points in Biology for JAMB 2026/2027 With 60 Questions and Answers
Key Points in Chemistry for JAMB 2026/2027 With 60 Questions and Answers
Below are 60 practice questions divided into sections for JAMB 2026.
PART I: Key Points in Chemistry for JAMB
A. Basic Chemistry Questions (10 Questions)
- The smallest particle of an element is called what?
Answer: Atom - What is the molar volume of a gas at STP?
Answer: 22.4 dm³ - Which law states that volume is inversely proportional to pressure?
Answer: Boyle’s Law - The number of protons in an atom is the what?
Answer: Atomic number - What is the charge of an electron?
Answer: Negative - What type of bond involves the transfer of electrons?
Answer: Ionic bond - What is the chemical formula of methane?
Answer: CH₄ - What is the pH of a neutral solution?
Answer: 7 - Which subatomic particle determines the chemical properties of an atom?
Answer: Electron - What is the oxidation state of oxygen in most compounds?
Answer: -2
PART II: Key Points in Chemistry for JAMB
Periodic Table and Elements (10 Questions)
- Which group are noble gases found in?
Answer: Group 18 - Sodium belongs to which group?
Answer: Group 1 - Which element has the symbol Fe?
Answer: Iron - Chlorine belongs to which group?
Answer: Group 17 - What is the most electronegative element?
Answer: Fluorine - What is the atomic number of carbon?
Answer: 6 - Which element is a metalloid?
Answer: Silicon - Which element has an oxidation state of 0 naturally?
Answer: Noble gases - What is the lightest element?
Answer: Hydrogen - Which series contains transition metals?
Answer: Groups 3 to 12
PART III: Key Points in Chemistry for JAMB
Stoichiometry and Calculations (10 Questions)
- How many moles are in 6.02 × 10²³ molecules?
Answer: 1 mole - What is the formula for calculating molarity?
Answer: M = mol / dm³ - The reactant that is used up first is called what?
Answer: Limiting reagent - What is the percentage composition formula?
Answer: (Mass of element / molar mass) × 100 - What is the molar mass of water?
Answer: 18 g/mol - What is one mole of carbon dioxide?
Answer: 44 g - What is the product of neutralization?
Answer: Salt and water - The number of particles in one mole is called what?
Answer: Avogadro’s number - What is theoretical yield?
Answer: Maximum possible amount of product - What is empirical formula?
Answer: Simplest whole number ratio of atoms
PART IV: Key Points in Chemistry for JAMB
Acids, Bases, Salts and Gas Laws (10 Questions)
- A substance that donates protons is called what?
Answer: Acid - A base that dissolves in water is called what?
Answer: Alkali - What gas turns lime water milky?
Answer: Carbon dioxide - What is the pH of a strong acid?
Answer: Less than 7 - Which acid is used in batteries?
Answer: Sulfuric acid - What is neutralization?
Answer: Reaction between acid and base - Which gas burns with a pop sound?
Answer: Hydrogen - What gas is needed for combustion?
Answer: Oxygen - A salt solution that conducts electricity is called what?
Answer: Electrolyte - What is the equation for Charles’s law?
Answer: V₁/T₁ = V₂/T₂
PART V: Key Points in Chemistry for JAMB
Organic Chemistry and Electrochemistry (10 Questions)
- What is the simplest alkane?
Answer: Methane - What is the functional group in alcohols?
Answer: OH - What process separates crude oil?
Answer: Fractional distillation - What is the general formula of alkanes?
Answer: CnH2n+2 - What is oxidation?
Answer: Loss of electrons - What is reduction?
Answer: Gain of electrons - Electrolysis of water produces what gases?
Answer: Hydrogen and oxygen - The electrode where oxidation occurs is called what?
Answer: Anode - The electrode where reduction occurs is called what?
Answer: Cathode - What is isomerism?
Answer: Compounds with same molecular formula but different structures
PART VI: Key Points in Chemistry for JAMB
Mixed Chemistry Questions (10 Questions)
- What is the colour of copper(II) sulfate solution?
Answer: Blue - Which gas has the lowest density?
Answer: Hydrogen - What is the SI unit of heat?
Answer: Joule - Which substance does not conduct electricity?
Answer: Non electrolytes - What is chromatography used for?
Answer: Separation of mixtures - Which gas is responsible for rusting?
Answer: Oxygen - What is the common name for NaCl?
Answer: Table salt - What is the colour of litmus in acid?
Answer: Red - What is the colour of litmus in base?
Answer: Blue - What is the pH of distilled water?
Answer: 7
Frequently Asked Questions (FAQs)
How many questions are in JAMB Chemistry?
JAMB Chemistry contains 40 questions covering calculations, theory, and organic chemistry.
Does JAMB repeat Chemistry questions?
Yes. JAMB repeats question patterns on atomic structure, gas laws, mole concept, and organic chemistry.
3. Is Chemistry hard in JAMB?
Chemistry is simple when you know formulas, practise calculations, and understand repeated topics.
How can I score high in JAMB Chemistry?
Study key points, practise calculations, and solve past questions every week.
What topics are most important in JAMB Chemistry?
Mole concept, gas laws, acids and bases, organic chemistry, electrolysis, periodic table, and redox reactions.
Conclusion
JAMB Chemistry is a subject you can master with the right key points and consistent practice. The explanations in this guide show you the exact areas JAMB tests every year. The 60 questions and answers will help you understand how JAMB sets questions and build your confidence. If you study these key points often and solve past questions regularly, scoring above 70 in Chemistry becomes very achievable.
Consistency is the secret. Study small portions daily and practise calculations often.
