Q2. Which of the following characteristics of waves can a ripple tank be used to demonstrate? I. Reflection II. Refraction III. Diffraction
AI, II and III
BI and III only
CI and II only
DII and III only
Correct Answer: A
A ripple tank demonstrates wave reflection (off barriers), refraction (through varying depth regions), and diffraction (around obstacles or through slits) effectively for water waves.
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waec2024mathematics
Q3. Consider the following statements: m: Edna is respectful n: Edna is brilliant If m ⇒ n, which of the following is valid?
A~m ⇒ ~n
Bn ⇒ ~m
C~n ⇒ ~m
Dn ⇒ m
Correct Answer: C
m ⇒ n is logically equivalent to ~n ⇒ ~m (contrapositive). To arrive at the solution, recall that the contrapositive of p → q is ~q → ~p, which has the same truth value.
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waec2015englishlit
Q4. The dominant literary device used in the passage is
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waec2022hausa
Q5. 'Mahadi' shine
Aconjunction
Bpreposition
Cinterjection
Darticle
Correct Answer: B
'Mahadi' shine preposition, wanda ke nuna alaƙa a jumla.
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waec2010english
Q6. Paper is made…….. wood pulp
Aon
Bof
Cfrom
Dwith
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waec2024agriculture
Q7. The best method to preserve fish in rural areas is
ASmoking
BFreezing
CSalting
DCanning
Correct Answer: A
Smoking is affordable and accessible in rural West Africa, using local wood to dry and flavor fish, extending shelf life without electricity or advanced equipment.
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waec2020civiledu
Q8. A citizen can lose his/her civic rights by
Apaying taxes
Bcommitting a serious crime
Cparticipating in elections
Djoining a political party
Correct Answer: B
Conviction for felonies may suspend rights (e.g., voting); others affirm citizenship.
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waec2024english
Q9. After each of the following sentences, a list of two possible interpretations is given. Choose the interpretation that is most appropriate for each sentence. He is a man of few words.
AHe talks a lot
BHe is quiet
CHe is loud
DHe is confused
Correct Answer: B
The phrase "a man of few words" means someone who speaks little and is reserved or taciturn.
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waec2024agriculture
Q10. The gestation period of a goat is approximately
A90 days
B120 days
C150 days
D180 days
Correct Answer: C
Goats have a gestation period of about 150 days (5 months), allowing farmers to plan kidding and breeding cycles effectively.
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waec2019chemistry
Q11. Vinegar is an aqueous solution of
Ahydrochloric acid
Bethanedioic acid
Cethanoic acid
Dhydrofluoric acid
Correct Answer: C
Vinegar contains 4-8% ethanoic acid (acetic acid, CH₃COOH), produced by fermentation of ethanol.
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waec2002chemistry
Q12. The most important use of hydrogen is in the
AHydrogenation of oils
BManufacture of methyl alcohol
CManufacture of ammonia
DManufacture of ethyl alcohol
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waec2018agriculture
Q13. Which of the following is a benefit of intercropping?
AIncreases pest attack
BImproves soil fertility
CReduces crop yield
DPromotes erosion
Correct Answer: B
Intercropping, especially with legumes, improves soil fertility through nitrogen fixation and efficient resource use, while also suppressing weeds and reducing pest pressure.
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waec2000commerce
Q14. Which of the following is true about cumulative preference shares?
AUnpaid dividends are carried forward
BShareholders can secure capital refund on demand
CShareholders are entitled to further share of profit
DDividends are paid into a special account
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waec2022insurance
Q15. Innocent misrepresentation may lead to
APolicy adjustment
BComplete avoidance
CPremium refund
DClaim acceptance
Correct Answer: A
Innocent misrepresentation (unintentional error without knowledge) allows the insurer to adjust terms or premium to reflect true risk, rather than voiding the policy, unlike fraudulent which leads to avoidance.
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waec2025mathematics
Q16. In a class of 42 students, 21 offer History and 28 offer Government. If each student offers at least one of the two subjects, find the probability that a student selected at random from the class offers Government only
A1/6
B1/3
C1/2
D3/4
Correct Answer: C
Both = 21 + 28 - 42 = 7, Government only = 28 - 7 = 21, probability = 21/42 = 1/2.
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waec2021english
Q17. From the words lettered A to D, choose the word that best completes the sentence. She gave her poem to her teacher to ___ for the school magazine.
Aread
Bedit
Ccorrect
Dlabel
Correct Answer: B
Editing involves preparing the poem for publication by making necessary changes.
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waec2018physics
Q18. A motorist travelling at 72kmh⁻¹ had his eyes shut for 0.4s during a hard sneeze. Calculate the distance covered by him during this time interval
A50.0m
B28.8m
C18.0m
D8.0m
Correct Answer: D
Convert 72 km/h = 20 m/s. Distance = speed × time = 20 × 0.4 = 8 m.
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waec2018chemistry
Q19. Beryllium and Aluminium have similar properties because they
Aare both metals
Bbelong to the same group
Cbelong to the same period
Dare positioned diagonally to each other
Correct Answer: D
Beryllium (Be, Group 2, Period 2) and Aluminium (Al, Group 13, Period 3) exhibit similar chemical properties due to the diagonal relationship in the periodic table. Elements diagonally adjacent show similarities because the increase in period number (↓) and group number (→) have opposing effects on properties, resulting in nearly identical charge density and electronegativity.
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waec2021computerstudies
Q20. What is the purpose of a homomorphic encryption scheme?
ATo enhance graphic rendering
BTo perform computations on encrypted data
CTo increase storage capacity
DTo optimize network traffic
Correct Answer: B
Homomorphic encryption allows arithmetic operations on ciphertexts, yielding encrypted results that match operations on plaintexts, enabling secure cloud computing.