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Chemistry 2003 WAEC Past Questions

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31
When excess ethene is shaken with acidified KMnO4 solution, the product obtained is
  • A. ethane
  • B. ethanal
  • C. ethane - 1, 2 - diol
  • D. ethanoic acid
View Answer & Discuss WAEC 2003
32
What volume of 0.20 mol dm -3 NaOH solution would yield 5.0 g of NaOH on evaporation to dryness? [NaOH = 40g mol-1]
  • A. 400 cm3
  • B. 625 cm3
  • C. 1000 cm3
  • D. 1600 cm 3
View Answer & Discuss WAEC 2003
33
Which of the following compound is used for removing impurities from bauxite?
  • A. NaOH
  • B. CaCO3
  • C. Na3AIF6
  • D. H2SO4
View Answer & Discuss WAEC 2003
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34
What is the main impurity in haematite?
  • A. CaSiO3
  • B. CaCO3
  • C. SiO3
  • D. Fe2O3
View Answer & Discuss (2) WAEC 2003
35
When a sample of water was boiled, it lathered more readily with soap. it can be concluded that the sample most likely contained
  • A. magnesium tetraoxosulphate (VI)
  • B. suspended solids
  • C. Organic impurities
  • D. calcium hydrogentrioxocarbonate (IV)
View Answer & Discuss (1) WAEC 2003
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