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Chemistry 2018 WAEC Past Questions

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1

Which of the following raw materials is used in the plastic industry?

  • A. Ethene
  • B. Methane
  • C. Sulphur
  • D. Hydrogen
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2

Which of the following organic compounds can undergo both addition and substitution reactions?

  • A. Pentane
  • B. Benzene
  • C. Propane
  • D. Hexane
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3

Which of the following equations represents a redox reaction?

  • A. \(HNO_{{3}{(aq)}} + NaOH_{(aq)} \to NaNO_{{3}{(aq)}} + H_{2}O_{(l)}\)
  • B. \(AgNO_{{3}{(aq)}}+KCl_{(aq)} \to AgCl_{(s)}+KNO_{{3}{(aq)}}\)
  • C. \(CaCO_{{3}{(s)}} \to CaO_{(s)} + CO_{{2}{(g)}}\)
  • D. \(2H_{2}S_{(s)} + SO_{{2}{(g)}} \to 2HO_{2} + 3S_{(g)}\)
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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4

The process of extraction of iron from its ore is

  • A. decomposition
  • B. oxidation
  • C. reduction
  • D. sublimation
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5

What is the solubility of a salt if 0.4g of it is obtained on evaporating 200\(cm^{3}\) of its saturated solution to dryness?

  • A. 0.08\(gdm^{-3}\)
  • B. 2.00\(gdm^{-3}\)
  • C. 8.00\(gdm^{-3}\)
  • D. 80.00\(gdm^{-3}\)
View Answer & Discuss (1) WAEC 2018
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Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts