NECO Chemistry Questions and Answers 2026 is out! Every year, thousands of students across Nigeria search for Chemistry examination updates before the paper. This page serves as a reliable information hub where candidates can find important announcements, expected topics, study tips, and examination guidance.
Latest Update on NECO Chemistry 2026
NECO 2026 CHEMISTRY QUESTIONS
NECO CHEMISTRY-OBJ
01-10: CBADDBACEE
11-20: DDCDBCDAEB
21-30: BEEDADCEED
31-40: BBBCBBCDCE
41-50: DEEAAAEACC
51-60: ACCDEBCCDD
NECO 2026 CHEMISTRY ESSAY NUMBER ONE
(1ai)
I. Dissolution of salt in water — Physical
II. Burning of paper — Chemical
III. Magnetization of iron — Physical
IV. Rusting of iron — Chemical
(1aii)
Liquid state
(1bi)
Relative molecular mass:
I. Ca(OH)₂ = 40 + 2(16+1) = 74
II. Pb(NO₃)₂ = 207 + 2(14+48) = 331
(1bii)
Isotopes: atoms of the same element with the same atomic (proton) number but different mass numbers (different neutron numbers).
(1biii)
I. Ionic pair: Na & S (11 & 16), since it’s a metal + nonmetal
II. Compound name: Sodium sulfide (Na₂S)
(1ci)
Charles’ Law state At constant pressure, the volume of a fixed mass of gas is directly proportional to its absolute (Kelvin) temperature.
(1cii)
P₁=7.50×10⁴ Nm⁻², V₁=15 cm³, T₁=323 K;
s.t.p.: P₂=1.0×10⁵ Nm⁻², T₂=273 K
V₂ = P₁V₁T₂ / (T₁P₂)
= (7.50×10⁴×15×273)/(323×1.0×10⁵)
≈ 9.51 cm³
(1di)
(i)Brownian motion.
(ii)Diffusion of gases.
(1dii)
Ionization energy is the minimum amount of energy required to remove the most loosely bound electron from an isolated gaseous atom in its ground state
(1diii)
TABULATE;
UNDER; Property
(i)Atomic radius
(ii)Electron affinity
(iii)Electronegativity
UNDER; Down a group
(i)Increases
(ii)Decreases
(iii)Decreases
UNDER; Across a period
(i)Decreases
(ii)Increases
(iii)Increases
NECO CHEMISTRY 2026 ESSAY NUMBER TWO
(2ai)
(i) Haematite (Fe₂O₃)
(ii) Magnetite (Fe₃O₄).
(2aii)
(i)Environmental pollution: Air, water, and soil contamination from industrial waste.
(ii)Health hazards: Toxic exposure leading to respiratory issues, skin irritation, or chronic diseases.
(iii)Global warming: Greenhouse gases like carbon dioxide trap heat and alter global climates.
(2bi)
Li > Na > K.
(2bii)
(i)Aufbau principle; electrons fill lowest-energy orbitals first.
(ii)Pauli exclusion principle; an orbital holds a maximum of 2 electrons, with opposite spins.
(iii)Hund’s rule; electrons singly occupy orbitals of equal energy before pairing up.
(2ci)
(i)Oxidizing agent; a substance that gains electrons (is itself reduced) and oxidizes another species.
(ii) Reducing agent; a substance that loses electrons (is itself oxidized) and reduces another species.
(2cii)
I. KOH → K⁺ + OH⁻
II. Pb(NO₃)₂ → Pb²⁺ + 2NO₃⁻
III. Na₂CO₃ → 2Na⁺ + CO₃²⁻
(2di)
I. Anode; the electrode where oxidation occurs (positive electrode in electrolysis).
II. Cathode; the electrode where reduction occurs (negative electrode in electrolysis).
(2dii)
Q = It = 1.0×900 = 900 C
mol e⁻ = 900/96500 = 0.009326
2e⁻ + 2H⁺ → H₂, so mol
H₂ = 0.009326/2 = 0.004663
V(H₂) = 0.004663 × 22.4 dm³ ≈ 0.104 dm³
(104 cm³)
MORE ANSWERS COMING SOON…
The NECO Chemistry examination for the 2026/2027 session is expected to hold according to the official timetable released by the National Examinations Council.
As of the latest update, there are currently no verified NECO Chemistry Objective or Essay questions and answers available before the examination.
Candidates are advised to avoid relying on unofficial sources claiming to possess original examination questions before the paper.
NECO Chemistry Examination Details
| Item | Information |
|---|---|
| Examination Body | NECO |
| Subject | Chemistry |
| Paper Type | Objective (OBJ) & Essay |
| Session | 2026/2027 |
| Examination Status | Awaiting Examination |
| Live Updates | Available |
| Last Updated | 13 July 2026 |
Is NECO Chemistry Questions and Answers 2026/2027 Out?
No.
The official NECO Chemistry Objective and Essay questions have not been released before the examination.
Candidates should be cautious of websites, social media pages, WhatsApp groups, and Telegram channels claiming to have access to the original examination questions before the paper begins.
This page will continue to be updated with verified information throughout the examination period.
Most Important Topics to Revise for Chemistry
Candidates should pay particular attention to the following topics:
- Atomic Structure
- Periodic Table
- Chemical Bonding
- Acids, Bases and Salts
- Mole Concept
- Chemical Equations
- Stoichiometry
- Gas Laws
- Oxidation and Reduction
- Electrolysis
- Organic Chemistry
- Hydrocarbons
- Separation Techniques
- Rates of Chemical Reactions
- Equilibrium
- Water and Air
- Metals and Their Compounds
- Non-metals and Their Compounds
- Carbon Compounds
- Environmental Chemistry
These areas frequently appear in both Objective and Essay sections of the examination.
READ ALSO:
- NECO Syllabus for Chemistry 2026/2027 PDF Download For Free
- How to Answer NECO Chemistry Calculations Correctly 2026/2027 | Full Steps
Topics Candidates Commonly Find Difficult
| Topic | Difficulty Level |
|---|---|
| Mole Concept | High |
| Stoichiometry | High |
| Organic Chemistry | High |
| Electrolysis | High |
| Chemical Bonding | Medium |
| Gas Laws | Medium |
| Equilibrium | Medium |
| Separation Techniques | Low |
Candidates are advised to spend extra time revising these areas before the examination.
How to Score High in NECO Chemistry
To improve your chances of obtaining an excellent result:
- Study the NECO Chemistry syllabus thoroughly.
- Understand concepts rather than memorizing notes.
- Practice balancing chemical equations.
- Revise important chemical reactions regularly.
- Learn laboratory apparatus and their uses.
- Solve previous NECO and WAEC Chemistry questions.
- Practice calculations involving moles and concentrations.
- Manage your examination time effectively.
Common Mistakes Candidates Make
Many students lose marks because they:
- Forget units during calculations.
- Skip calculation steps.
- Confuse oxidation with reduction.
- Memorize reactions without understanding them.
- Ignore practical chemistry concepts.
Avoiding these mistakes can significantly improve your final score.
Live Examination Updates
This page serves as a live update centre for the NECO Chemistry examination.
Verified information regarding timetable adjustments, examination announcements, post-exam discussions, and important notices will be published here whenever available.
Bookmark this page and revisit it regularly for updates.
Frequently Asked Questions
Are the NECO Chemistry Objective and Essay Questions Out?
No. There are currently no verified questions or answers available before the examination.
Is Chemistry Difficult?
Chemistry can be challenging for candidates who rely solely on memorization. Students who understand the concepts and practice calculations regularly often perform much better.
Does NECO Repeat Chemistry Questions?
While exact questions may differ, important concepts and topics frequently reappear in different forms across examination years.
How Can I Get an A in Chemistry?
Study the syllabus thoroughly, understand the core concepts, revise practical topics, and solve past questions consistently.
Final Thoughts
Many candidates search for NECO Chemistry Questions and Answers 2026/2027 (Objective & Essay) every examination season. However, the best preparation strategy remains understanding the subject concepts, revising consistently, and practicing past questions.
Keep visiting MasterNECO.com.ng for verified NECO updates, Chemistry revision guides, practical resources, study materials, and examination news throughout the 2026 examination season.
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