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Ikiodiete George
- 2 Min Read
Jamb Chemistry Cbt Exam (2025/2026): Full List Of Most Repeated Topics & Past Questions
Chemistry is a core subject for students aiming to study courses like Medicine, Pharmacy, Biochemistry, Chemical Engineering, Nursing, and other science-related fields. To score high in the 2025/2026 JAMB Chemistry CBT exam, you must study strategically.
This means focusing on the most repeated topics and practicing with past questions that often come back with little change.
JAMB Chemistry CBT Exam Overview
| Section | Details |
|---|---|
| Exam Format | Computer-Based Test (CBT) |
| Number of Questions | 40–50 multiple-choice questions |
| Duration | 45–60 minutes |
| Target Score | 250 and above |
| Subjects Tested | Inorganic, Organic, and Physical Chemistry |
Most Repeated Topics in JAMB Chemistry
Here are the top topics that JAMB repeats almost every year:
| Topic | What to Focus On |
|---|---|
| Atomic Structure & Periodic Table | Electronic configuration, periodicity |
| Chemical Bonding | Ionic, covalent, metallic bonds |
| Stoichiometry & Mole Concept | Molar mass, empirical formula, equations |
| Gas Laws | Boyle’s, Charles’, Ideal Gas Law |
| Acids, Bases & Salts | pH scale, titration, neutralization |
| Equilibrium & Rates of Reaction | Factors affecting equilibrium, Le Chatelier’s principle |
| Redox & Electrolysis | Oxidation numbers, electrochemical cells |
| Organic Chemistry | Alkanes, alkenes, alcohols, isomerism |
| Chemical Kinetics | Reaction rates, energy diagrams |
| Environmental Chemistry | Air pollution, water treatment |
| Industrial Chemistry | Haber, Contact, and Solvay processes |
Topic Frequency Table (2015–2024 JAMB Trend)
| Topic | How Often It Appears |
|---|---|
| Atomic Structure | ✅✅✅✅✅✅✅✅✅ |
| Organic Chemistry | ✅✅✅✅✅✅✅ |
| Gas Laws | ✅✅✅✅✅ |
| Acids, Bases, & Salts | ✅✅✅✅✅ |
| Electrolysis & Redox | ✅✅✅✅✅✅ |
| Stoichiometry | ✅✅✅✅✅✅✅ |
| Chemical Bonding | ✅✅✅✅✅✅ |
Sample Past JAMB Chemistry Questions
1. Which of the following is a noble gas?
A. Nitrogen
B. Oxygen
C. Argon
D. Hydrogen
✅ Correct Answer: C
2. What is the oxidation number of sulfur in H₂SO₄?
A. +4
B. +6
C. +2
D. –2
✅ Correct Answer: B
3. The process of removing temporary hardness in water is...
A. Distillation
B. Boiling
C. Filtration
D. Sedimentation
✅ Correct Answer: B
4. Which compound is a hydrocarbon?
A. CH₄
B. NH₃
C. H₂O
D. NaCl
✅ Correct Answer: A
Quick Chemistry Concepts to Remember
| Term | Definition |
|---|---|
| Isomerism | Compounds with same molecular formula but different structures |
| Redox Reaction | A reaction involving oxidation and reduction |
| pH Scale | Measures the acidity or alkalinity of a solution |
| Haber Process | Used to produce ammonia |
| Mole | 6.022 × 10²³ particles of a substance |
JAMB Chemistry Study Tips
To score high in Chemistry, here are some proven tips:
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Study With Past Questions – Practice 2010 to 2024 JAMB Chemistry questions.
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Master Calculations – Topics like mole, gas laws, and titrations require speed and accuracy.
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Use Charts & Tables – The periodic table and solubility rules should be at your fingertips.
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Understand, Don’t Cram – Focus on why reactions happen, not just the results.
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Time Yourself During Practice – To improve speed and exam readiness.
Frequently Asked Questions (FAQs)
Q1: How many Chemistry questions are in JAMB CBT?
A: You’ll answer between 40 and 50 questions.
Q2: Is Chemistry compulsory in JAMB?
A: Yes, if you’re applying for science-related courses.
Q3: Can I pass Chemistry if I’m weak in calculations?
A: Yes, but you must practice calculation-based questions regularly.
Q4: Where can I get free Chemistry past questions?
A: Educational sites like Myschool.ng, Flashlearners, and many CBT apps offer free downloads.
Final Words
Chemistry in JAMB is not difficult when you know what to expect. Don’t waste time reading irrelevant topics.
Instead:
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Focus on most repeated topics
-
Practice regularly with past questions
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Understand basic concepts and formulas
If you do that, scoring 250+ in Chemistry will be very possible.
