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Most Repeated Topics In Jamb Chemistry Exam: (Updated Guide, 2025/2026)

Preparing for the Joint Admissions and Matriculation Board (JAMB) Chemistry exam can be daunting, but focusing on the most repeated topics is a proven strategy for success. Over the years, JAMB has consistently tested certain key topics, making them a priority for candidates aiming to score high. This updated guide for the 2025/2026 session highlights these topics, offering insights, study tips, and resources to excel.

Understanding JAMB Chemistry Exam Structure

Before diving into the repeated topics, it’s crucial to understand the structure of the JAMB Chemistry exam. The exam typically consists of 40 questions, testing candidates on various aspects of Chemistry, including theoretical knowledge, practical applications, and problem-solving skills. The questions are drawn from the Senior Secondary School curriculum, so thorough preparation is essential.

Top Repeated Topics in JAMB Chemistry

Here is a detailed analysis of the most frequently tested topics in JAMB Chemistry:

1. Atomic Structure

This is one of the foundational topics in Chemistry and a favorite of JAMB examiners. Questions on atomic structure often test:

• The structure of the atom: Protons, neutrons, and electrons.

• Atomic and mass numbers.

• Isotopes and their applications.

• Electronic configuration: Using Aufbau’s principle, Hund’s rule, and the Pauli exclusion principle.

Study Tip: Practice electronic configuration for elements up to atomic number 30. Pay attention to periodic trends like ionization energy, electron affinity, and atomic radius.

2. Chemical Bonding

Questions on chemical bonding frequently appear, as they are central to understanding how atoms combine. Key areas include:

• Ionic bonding.

• Covalent bonding.

• Metallic bonding.

• Van der Waals forces and hydrogen bonding.

Common Questions:

• Compare ionic and covalent compounds in terms of properties.

• Predict the type of bonding in given compounds.

Study Tip: Use diagrams to visualize molecular structures and bonding. Understand the octet rule and its exceptions.

3. The Periodic Table

The periodic table is a recurring topic because it underpins the organization of chemical elements. Key focus areas include:

• Trends in the periodic table: Atomic size, electronegativity, ionization energy, and metallic/non-metallic character.

• Groups and periods: Alkali metals, halogens, and noble gases.

• Periodic law.

Study Tip: Memorize the periodic table's first 20 elements and understand their properties. Practice interpreting periodic trends and their implications.

4. Chemical Equations and Stoichiometry

This topic is a staple in JAMB Chemistry because it tests both theoretical and practical understanding. Areas to focus on include:

• Balancing chemical equations.

• Mole concept and molar calculations.

• Empirical and molecular formulas.

• Percentage purity and yield.

Common Questions:

• Calculate the mass of reactants or products in a chemical reaction.

• Determine the empirical formula of a compound from percentage composition data.

Study Tip: Solve many stoichiometry problems to improve speed and accuracy.

5. Acids, Bases, and Salts

Acids, bases, and salts are highly important in Chemistry. Questions usually cover:

• Properties of acids, bases, and salts.

• pH scale and indicators.

• Preparation of salts: Solubility rules and methods.

• Neutralization reactions.

Common Questions:

• Write equations for acid-base reactions.

• Identify salts based on solubility rules.

Study Tip: Memorize strong acids, strong bases, and solubility rules. Practice titration problems.

6. Organic Chemistry

Organic chemistry is another frequently tested area, particularly because of its relevance to real-life applications. Key subtopics include:

• Hydrocarbons: Alkanes, alkenes, and alkynes.

• Functional groups: Alcohols, aldehydes, ketones, carboxylic acids, and esters.

• IUPAC nomenclature.

• Reactions of organic compounds.

Common Questions:

• Write the structural formula for organic compounds.

• Name compounds using IUPAC rules.

Study Tip: Create flashcards for functional groups and practice naming compounds.

7. Electrolysis

Electrolysis frequently appears in JAMB exams, especially its applications in industry. Topics to focus on include:

• Electrolytes and non-electrolytes.

• Faraday’s laws of electrolysis.

• Electroplating and extraction of metals.

Common Questions:

• Calculate the mass of a substance deposited during electrolysis.

• Explain the principles behind electroplating.

Study Tip: Master Faraday's laws and their calculations.

8. Thermochemistry

Thermochemistry is tested for its theoretical and practical relevance. Key areas include:

• KEnthalpy changes: Heat of reaction, combustion, and formation.

• Hess's law.

• Bond energy calculations.

Study Tip: Practice energy cycle diagrams and calculations involving Hess’s law.

9. Rate of Reaction

The rate of chemical reactions is a key topic in JAMB Chemistry. Focus areas include:

• Factors affecting reaction rates: Temperature, concentration, surface area, and catalysts.

• Collision theory and activation energy.

• Order of reaction.

Study Tip: Conduct experiments or watch videos demonstrating how reaction rates change under different conditions.

10. Separation Techniques

Separation techniques are often tested, especially their practical applications. Key techniques include:

• Distillation.

• Filtration.

• Chromatography.

• Crystallization.

Common Questions:

• Identify appropriate separation methods for mixtures.

• Explain the principles behind chromatography.

Study Tip: Familiarize yourself with diagrams of lab setups for each technique.

11. Environmental Chemistry

This relatively new area focuses on real-world issues. Topics include:

• Water pollution.

• Air pollution and greenhouse gases.

• Acid rain and its effects.

Study Tip: Understand the chemical processes leading to environmental issues and their mitigation.

How to Prepare for JAMB Chemistry

1. Use the JAMB Syllabus

The JAMB Chemistry syllabus outlines all topics that may be tested. Focus on the most repeated topics but don’t neglect others.

2. Practice Past Questions

Solve as many past questions as possible to identify trends and familiarize yourself with the exam pattern.

3. Take Mock Tests

Mock tests simulate the actual exam, helping you improve your speed and accuracy.

4. Use Recommended Textbooks

Use textbooks approved by JAMB, such as:

• New School Chemistry by Osei Yaw Ababio.

• Essential Chemistry for Senior Secondary Schools by O. A. I. Odutuyi.

5. Leverage Online Resources

Platforms like Myschool.ng and Pass.ng provide practice questions and study materials tailored to JAMB exams.

Conclusion

The JAMB Chemistry exam consistently tests certain key topics, making focused preparation a smart strategy. By prioritizing topics like atomic structure, chemical bonding, stoichiometry, and organic chemistry, candidates can significantly boost their scores. Combine this knowledge with consistent practice and the use of quality study materials to excel in the 2025/2026 JAMB Chemistry exam.

With this updated guide, you’re well-equipped to tackle JAMB Chemistry confidently. Remember, success comes from consistent effort and smart preparation. Good luck!