PUTME Chemistry 2025 · Question 1
The atomic number of an element represents:
- Neutrons
- Protons — correct answer
- Electrons and protons
- Mass
Worked solution
The atomic number is the number of protons in the nucleus of an atom of the element.
PUTME Chemistry past questions.
1,160 real Post-UTME Screening questions from 2006 to 2025, every one with a worked solution. Practise them timed, on the web, on Android, or offline on desktop.
- Questions held
- 1,160
- Years covered
- 20
- Questions per paper
- 40
- Time allowed
- 45 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.
PUTME Chemistry 2024 · Question 1
The activation energy of a chemical reaction can be reduced by
- adding more reactants
- removing some products
- adding a catalyst — correct answer
- lowering the temperature
Worked solution
A catalyst provides an alternative reaction pathway with a lower activation energy.
PUTME Chemistry 2023 · Question 1
Which of the following statements correctly represents Le Chatelier's Principle?
- If a stress is applied to a system, the system readjusts to produce the stress
- If a stress is applied to a system in equilibrium, the system will readjust to counter the stress — correct answer
- If a stress is applied to a system which is not at equilibrium, the system will readjust to counter the stress
- If a stress is applied to a system, the stress will readjust for the reaction to take place spontaneously
Worked solution
Le Chatelier's principle says that when a constraint (change in concentration, pressure or temperature) is applied to a system at equilibrium, the system shifts its position to oppose or annul the constraint.
PUTME Chemistry 2022 · Question 1
The number of moles of solute present in 50 cm of a 0.25 M solution is
- 0.025
- 0.022
- 0.0125 — correct answer
- 0.010
Worked solution
n = C × V = 0.25 × 0.050 = 0.0125 mol.
PUTME Chemistry 2021 · Question 1
The number of protons, electrons and neutrons in the C-12 isotope are respectively
- 6, 12 and 12
- 12, 12 and 6
- 6, 6 and 6 — correct answer
- 12, 6 and 12
Worked solution
Carbon has atomic number 6, so 6 protons and 6 electrons; neutrons .
Every paper we hold
PUTME Chemistry, year by year.
2025
17 questions
2024
94 questions
2023
33 questions
2022
77 questions
2021
81 questions
2020
25 questions
2019
45 questions
2018
71 questions
2017
56 questions
2016
36 questions
2015
46 questions
2014
10 questions
2013
10 questions
2012
40 questions
2011
30 questions
2010
46 questions
2009
60 questions
2008
61 questions
2007
84 questions
2006
59 questions
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How PUTME Chemistry is set.
Post-UTME Screening sets 40 questions in Chemistry, answered in 45 minutes — about 68 seconds a question. Practising against that clock is the part most candidates skip, and it is the part that costs marks.
We hold 1,160 published Chemistry questions spanning 2006 to 2025. 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.
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