NECO Likely Chemistry Questions and Answers 2026

5 minutes read.

What are the areas NECO will set Chemistry questions from and how do I get NECO Chemistry Questions 2026 Likely Obj and Theory answers correctly in the exam hall?

NECO Likely Chemistry Questions and Answers 2026

NECO Chemistry Questions are compulsory for NECO Science students. Continue reading for Questions NECO would set in 2026 Chemistry or Click Here for NECO 2026 Chemistry Syllabus.

NECO 2026 Chemistry Questions (Video)

VIDEO CONTENTS

00:00 – Intro
01:13 – Glucose With Fehling’s Solution
02:43 – Oxidation and Reduction (Redox)
05:55 – Oxidising and Reducing Agents
10:16 – Electrolytes and Conductors
10:55 – Why Electricity is Transmitted at high Voltage and low Current
11:54 – Electrolysis
12:45 – Electrolysis of Dilute NaCl and Electrolysis of Brine
14:30 – Ionisation of Electrolytes
11:52 – Acids and Bases Definitions
15:35 – Cations and Anions
16:23 – Preferential discharge of ions
16:45 – Electrochemical Series of Cations
17:45 – Factors affecting preferential discharge
20:35 – Formation of ions & Atoms (Positive and Negative)
24:30 – Isotopy
26:14 – Isomers
26:52 – Isotones
28:02 – Allotropes
28:43 – Fats and Oils (Esters)
28:50 – Solubility Calculation
31:28 – Radioactivity

To make this topic easy for you to understand, I will divide it into three sections. The three sections are:

NECO Chemistry Objective Questions
NECO Chemistry Theory Questions And Answers.
Instructions To Pass NECO Examination.

Now that you are familiar with the various areas Chemistry NECO 2026 questions will come from, the next thing is to know exactly what NECO will ask from these areas in NECO.

NECO 2026 Chemistry Objective Questions

As usual, you will be given questions and options A to D to choose from. Normally, the number of objective questions (OBJ) you are to answer in NECO 2026 Chemistry is 50.

The Following Are Sample NECO Objective Questions. They are likely questions for NECO.

1. Which of the following statements is NOT correct?

A. The average kinetic energy of a gas is directly proportional to its temperature
B. At constant temperature, the volume of a gas increases as the pressure increases
C. The pressure of a gas is inversely proportional to its volume
D. The temperature of a gas is directly proportional to its volume
E. The collisions of molecules with each other are inelastic

2. An example of alcohol is

A. CCl₄
B. CH₃COOH
C. CHCl₃
D. C₂H₆
E. CH₃OH

3. Zinc Oxide is a

A. Basic Oxide
B. Acidic Oxide
C. Amphoteric Oxide
D. Neutral Oxide
E. Reactive Oxide

4. The nucleus of an atom contains

A. protons only
B. neurons only
C. protons and electrons
D. neutrons and electrons
E. protons and neutrons

5. The normal boiling point of a liquid is defined as

A. the temperature at which its vapour pressure equals the atmospheric pressure
B. the temperature at which bubbles begin to form
C. the temperature at which the vapour pressure equals 1 temperature
D. the temperature at which the rate of condensation of vapour equals the rate of vaporisation of the liquid
E. the temperature at which the space above the liquid is saturated

6. The periodic classification of elements is an arrangement of the elements in order of their

A. Atomic Weights
B. Isotopic Weights
C. Molecular Weights
D. Atomic Numbers
E. Atomic Masses

7. A small quantity of solid ammonium chloride (NH₄Cl) was heated gently in a test tube, the solid gradually disappears to produce two gases. Later, a white cloudy deposit was observed on the cooler part of the test tube. The ammonium chloride is said to have undergone

A. distillation
B. sublimation
C. precipitation
D. evaporation
E. decomposition

8. Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively, therefore,

A. P will form an electrovalent bond with R
B. Q will form a covalent bond with S
C. R will form an electrovalent bond with S
D. Q will form an electrovalent bond with S
E. Q will form a covalent bond with R

Full 2026 Waec Questions And Answers in All Subjects

9. When air which contains the gases Oxygen, nitrogen, carbondioxide, water vapour and the rare gases, is passed through alkaline pyrogallol and then over quicklime, the only gases left are;

A. nitrogen and carbondioxide
B. the rare gases
C. nitrogen and oxygen
D. nitrogen and the rare gases
E. nitrogen, carbondioxide and the rare gases

10. When heat is absorbed during a chemical reaction, the reaction is said to be

A. thermodynamic
B. exothermic
C. isothermal
D. endothermic
E. thermostatic

11. During the electrolysis of copper II sulphate between platinum electrodes, if litmus solution is added to the anode compartment,

A. the litmus turns blue but no gas is evolved
B. the litmus turns blue and oxygen is evolved
C. the litmus turns blue and hydrogen is evolved
D. the litmus turns red and oxygen is evolved
E. the litmus turns red and then becomes colourless

12. A sample of hard water contains some calcium sulphate and calcium hydrogen carbonate. The total hardness may, therefore, be removed by

A. boiling the water
B. adding excess calcium hydroxide
C. adding a calculated amount of calcium hydroxide
D. adding sodium carbonate
E. adding magnesium hydroxide

Chemistry NECO 2026 Theory

The following are the kind of questions you should expect in NECO Chemistry Theory or Essay. They are hot cake questions:

What is transition element
Why does iron exhibit variable oxidation states and paramagnetism
State the differences between conductors and electrolytes
What is saponification
Differentiate between efflorescence, deliquescence and hygroscopy
What is fermentation, write the equation for fermentation of glucose
Define hybridization and explain how it is formed
What is solubility
What are the different electrolytic cells
What is Acid, base and salt?

That’s all for now… I shall update you when more real live questions and answers come up. However, I advice that you are hardworking so as to pass your NECO once and for all.