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WAEC WASSCE Mock Test
A timed 25-question mock for the West African Senior School Certificate Examination covering english grammar, algebra, biology, chemistry. Answer, submit and review every question with its explanation; set negative marking to match your exam’s current scheme.
WAEC WASSCE mock test
25 questions · 1 mark each · the timer starts with your first answer and the test submits itself when time runs out.
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Q1.English GrammarChoose the correct option: He prefers tea ___ coffee.
Answer: B — to
“Prefer X to Y” is the correct pattern.
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Q2.AlgebraFind log₃ 27.
Answer: B — 3
log_3(27) asks “3 to what power gives 27?” → 3^3 = 27, so the answer is 3.
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Q3.BiologyDNA is mainly found in the cell’s:
Answer: A — Nucleus
Most DNA is in the nucleus (some in mitochondria and chloroplasts).
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Q4.ChemistryThe periodic table is arranged in order of increasing:
Answer: C — Atomic number
The modern periodic table orders elements by atomic number.
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Q5.English GrammarChoose the correct preposition: She is good ___ mathematics.
Answer: C — at
The idiom is “good at” a subject or skill.
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Q6.AlgebraSolve: x² − 2x − 8 = 0
Answer: C — -2, 4
Find two roots with sum 2 and product -8: -2 and 4. So x² − 2x − 8 = (x + 2)(x − 4) = 0.
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Q7.BiologyPhotosynthesis takes place in the:
Answer: D — Chloroplasts
Chloroplasts contain chlorophyll that captures light energy.
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Q8.Chemistry20 g of NaCl (molar mass 58.5) is dissolved to make 500 mL of solution. Find the molarity.
Answer: A — 0.684 M
Moles = 20/58.5 = 0.342; molarity = moles ÷ litres = 0.342 ÷ 0.5 = 0.684 M.
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Q9.English GrammarChoose the correct tag question: She can swim, ___?
Answer: A — can’t she
A positive statement takes a negative tag with the same auxiliary: “can’t she?”.
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Q10.AlgebraSolve: 3x + 2y = 3 and 5x + 5y = 15
Answer: D — x = -3, y = 6
Elimination/substitution gives x = -3, y = 6. Check: 3(-3) + 2(6) = 3 ✓ and 5(-3) + 5(6) = 15 ✓.
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Q11.BiologyThe largest organ of the human body is the:
Answer: C — Skin
The skin is the largest organ by area and weight.
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Q12.ChemistryThe hardest naturally occurring substance is:
Answer: C — Diamond
Diamond, a carbon allotrope, is the hardest natural material.
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Q13.English GrammarIdentify the correct sentence.
Answer: D — He and I went to the market.
Subject pronouns (he, I) are needed for the subject of the verb.
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Q14.AlgebraSolve: x² − 4x − 21 = 0
Answer: C — -3, 7
Find two roots with sum 4 and product -21: -3 and 7. So x² − 4x − 21 = (x + 3)(x − 7) = 0.
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Q15.BiologyMalaria is caused by:
Answer: C — Plasmodium (a protozoan)
Plasmodium parasites are spread by female Anopheles mosquitoes.
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Q16.ChemistryWhat is the mass of 3 mol of water (H₂O)? (Molar mass 18 g/mol)
Answer: A — 54 g
Mass = moles × molar mass = 3 × 18 g/mol = 54 g.
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Q17.English GrammarChoose the correct option: Scarcely ___ the room when the lights went out.
Answer: C — had I entered
Negative adverbs at the start (scarcely, hardly) cause inversion: “had I entered”.
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Q18.AlgebraFind log₂ 8.
Answer: B — 3
log_2(8) asks “2 to what power gives 8?” → 2^3 = 8, so the answer is 3.
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Q19.BiologyWhich part of the flower develops into the fruit?
Answer: D — Ovary
After fertilisation the ovary develops into the fruit.
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Q20.ChemistryWhich bond is formed by the sharing of electrons?
Answer: A — Covalent
Covalent bonds share electron pairs.
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Q21.English GrammarChoose the correct option: There is no ___ in crying over spilt milk.
Answer: A — use
Fixed expression: “There is no use (in) doing something”.
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Q22.AlgebraSolve: x² − x − 30 = 0
Answer: B — -5, 6
Find two roots with sum 1 and product -30: 6 and -5. So x² − x − 30 = (x − 6)(x + 5) = 0.
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Q23.BiologyWhich organelle synthesises proteins?
Answer: D — Ribosome
Ribosomes translate mRNA into protein.
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Q24.Chemistry20 g of NaOH (molar mass 40) is dissolved to make 1000 mL of solution. Find the molarity.
Answer: D — 0.5 M
Moles = 20/40 = 0.5; molarity = moles ÷ litres = 0.5 ÷ 1 = 0.5 M.
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Q25.English GrammarChoose the correct option: If I ___ you, I would accept the offer.
Answer: C — were
The subjunctive “were” is used in hypothetical conditions: “If I were you…”.
How the mock test works
- The timer starts with your first answer; the test submits itself when time runs out.
- Choose the negative marking that matches your exam (this test has no negative marking by default — check the official notification).
- After submitting you get your score, accuracy, time taken and a topic-wise breakdown, then every explanation.
- “New mock test” builds another paper — calculation questions get new numbers.
About WAEC WASSCE
West African Senior School Certificate Examination — conducted by West African Examinations Council (WAEC). Senior school certificate exam taken in Nigeria, Ghana, Sierra Leone, Liberia and The Gambia.
Original practice questions written for this site in the style and difficulty of each exam’s syllabus. They are not past papers and the site is not affiliated with any exam body. Exam patterns, marking schemes and syllabi change — always check the latest official notification.
WAEC WASSCE practice topics
| Topic | Section | Question source |
|---|---|---|
| English Grammar | English | Question bank |
| Algebra | Mathematics | Calculated (new numbers every set) |
| Biology | Science | Question bank |
| Chemistry | Science | Calculated + question bank |