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WAEC Chemistry past questions.

1,486 real West African Examinations Council (WASSCE) questions from 1997 to 2026, every one with a worked solution. Practise them timed, on the web, on Android, or offline on desktop.

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Questions held
1,486
Years covered
30
Questions per paper
50
Time allowed
120 min
Try 5

Sample Chemistry questions, answered.

Taken straight from the papers below — one from each of the most recent years, with the answer marked and the reasoning written out.

WAEC Chemistry 2026 · Question 1
Which of these carbohydrates contains fructose?
  1. Galactose
  2. Sucrose — correct answer
  3. Lactose
  4. Cellulose
Worked solution
Sucrose is a disaccharide made up of one glucose unit joined to one fructose unit, while galactose, lactose and cellulose contain no fructose.
WAEC Chemistry 2025 · Question 1
Which of the following pairs of gases cannot be collected by downward delivery?
  1. SO2\text{SO}_2 and NH3\text{NH}_3
  2. CO\text{CO} and N2\text{N}_2 — correct answer
  3. Cl2\text{Cl}_2 and H2S\text{H}_2\text{S}
  4. SO2\text{SO}_2 and N2\text{N}_2
Worked solution
Downward delivery is used only for gases denser than air, so CO\text{CO} and N2\text{N}_2 (molar mass 28, lighter than air at about 29) are the pair that cannot be collected that way, while Cl2\text{Cl}_2 and H2S\text{H}_2\text{S} are both denser than air and can be.
WAEC Chemistry 2024 · Question 1
Which of the following gases could be collected by downward displacement of air?
  1. Chlorine
  2. Hydrogen — correct answer
  3. Hydrogen chloride
  4. Sulphur(IV) oxide
Worked solution
Hydrogen is much less dense than air, so it displaces air downwards out of an inverted gas jar.
WAEC Chemistry 2023 · Question 1
Which of the following laws or theory cannot be explained by the application of the kinetic theory of gases?
  1. Dalton's atomic theory — correct answer
  2. Charle's law
  3. Gay-lussac's law
  4. Boyle's law
Worked solution
Charles', Gay-Lussac's and Boyle's laws all describe gas behaviour explained by kinetic theory, whereas Dalton's atomic theory is about the structure of matter.
WAEC Chemistry 2022 · Question 1
The by-product of fermentation of sugar is
  1. carbon(IV) oxide — correct answer
  2. ethanoic acid
  3. propanol
  4. propan-1, 2, 3-triol
Worked solution
Fermentation gives ethanol as the product and CO2\text{CO}_2 as the by-product: C6H12O6→2C2H5OH+2CO2\text{C}_6\text{H}_{12}\text{O}_6 \rightarrow 2\text{C}_2\text{H}_5\text{OH} + 2\text{CO}_2.
Every paper we hold

WAEC Chemistry, year by year.

2026
50 questions
2025
50 questions
2024
50 questions
2023
50 questions
2022
50 questions
2021
50 questions
2020
50 questions
2019
50 questions
2018
36 questions
2017
50 questions
2016
50 questions
2015
50 questions
2014
50 questions
2013
50 questions
2012
50 questions
2011
50 questions
2010
50 questions
2009
50 questions
2008
50 questions
2007
50 questions
2006
50 questions
2005
50 questions
2004
50 questions
2003
50 questions
2002
50 questions
2001
50 questions
2000
50 questions
1999
50 questions
1998
50 questions
1997
50 questions
Before you sit it

How WAEC Chemistry is set.

West African Examinations Council (WASSCE) sets 50 questions in Chemistry, answered in 120 minutes — about 144 seconds a question. Practising against that clock is the part most candidates skip, and it is the part that costs marks.

We hold 1,486 published Chemistry questions spanning 1997 to 2026. You can practise any single year’s paper, or sit a full timed mock that mirrors the real interface — the navigator, the flags and the auto-submit included.

Every question you get wrong comes back the next day, then at longer gaps until it sticks, and your home page leads with your weakest subjects.

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