2021 WAEC (WASSCE) Chemistry Past Questions

Mary made a clean breast of everything. This means that Mary

1. A.won everyone over✓ Correct
2. B.told the whole truth
3. C.did everything effficiently
4. D.changed the way things were done

In question numbered 91 above, choose the best option from letters A - D that best completes the gap.

1. A.pitches
2. B.kinds
3. C.fields✓ Correct
4. D.parks

Highlight five (5) positive impacts of British and French colonial administration in West Africa.

Find the median of the following set of scores: 65, 72, 55, 48, 78

1. A.55
2. B.60
3. C.63.5
4. D.65✓ Correct
5. E.72

which of the following activities will not lead to economic growth?

1. A.massive importation of capital goods
2. B.intensive capital formation locally
3. C.use of modern technology✓ Correct
4. D.massive importation of consumer goods

Which of the following parts of the ear does NOT contain endolymph?

1. A.Semi-circular canals
2. B.Utriculus
3. C.Tympanum
4. D.Sacculus✓ Correct

choose the word or group of words that best completes each of the following sentences: You can apply if you agree_______their terms.

1. A.upon
2. B.to✓ Correct
3. C.about
4. D.in

From the words or group of words lettered A to D, choose the one that best completes the sentence. As the opposing parties would not agree, the peace meeting....in confusion.

1. A.broke out
2. B.broke through
3. C.broke off
4. D.broke up✓ Correct

Measurements of height and weight of students in a class show

1. A.discontinuous variation
2. B.continuous variation✓ Correct
3. C.shortness is more prevalent
4. D.fatness is less prevalent

Which of the following equations represents a substitution reaction?

1. A.C 2H10(g) + CI 2(g) → C4H9 CI(g) + HCI(g)
2. B.C 2H4(g) + HCI (g) → C 2H5 CI(l)✓ Correct
3. C.C2H2(g) + 2H 2(g) → C 2H6(g)
4. D.C 3H4(g) + 402(g) → 3CO2(g) + 2H 2O(g)