WAEC Past Questions and Answers - Page 1813

9,061.

Petrol can be obtained from diesel by

A.

distillation

B.

cracking

C.

catalysis

D.

polymerization

E.

dehydrogenation

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

9,062.

The following metals are extracted by the electrolytic method except

A.

potassium

B.

calcium

C.

sodium

D.

tin

E.

magnesium

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

9,063.

Which of the following compounds crystallizes without water of crystallization?

A.

Na₂CO₃

B.

CuSO₄

C.

MgSO₄

D.

NaCI

E.

FeSO₄

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

9,064.

The decomposition of hydrogen peroxide is represented by the equation: 2H₂O_(l) + O₂_(g) what mass of hydrogen peroxide would be required to produce 22.4dm₃ of oxygen at s.t.p? (H = 1, O = 16, molar volume of a gas at s.t.p. = 22.4dm₃)

A.

18 g

B.

34 g

C.

36 g

D.

64 g

E.

68 g

View answer & explanation

Correct answer is E

No explanation has been provided for this answer.

9,065.

Nuclear reactions can be used in the following except

A.

gauging the thickness of objects

B.

making atomic bombs

C.

curing cancer

D.

generating electricity

E.

purifying water

View answer & explanation

Correct answer is E

No explanation has been provided for this answer.

WAEC Subjects

English Language

Agricultural Science

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Further Mathematics

Literature in English

Islamic Religious Knowledge

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Office Practice

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Aptitude Tests

Typing Speed and Accuracy Test

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Abstract Reasoning Questions and Answers

Puzzles Questions and Answers

Microsoft Office Questions and Answers

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Nigeria General Knowledge Questions and Answers

Logical Reasoning Questions and Answers

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