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Chemistry WAEC Past Questions

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41
120cm3 of hydrogen were sparked with 60cm 3 of oxygen at 110oC. What was the volume of stream produced? The equation for the reaction is 2H2(g) + O2(g) → 2H2O(g)
  • A. 30cm3
  • B. 60cm3
  • C. 90cm3
  • D. 120cm3
  • E. 180cm3
View Answer & Discuss (4) WAEC 1989
42
The earthly impurities in iron ore are removed in the blast furnace by the reaction
  • A. CO2 + C →2CO
  • B. Fe2O3 + 3CO →2Fe + 3CO2
  • C. SiO2 + CaO →CaSiO3
  • D. CaCO3 → CaO + CO2
  • E. C +CO2 → CO2
View Answer & Discuss WAEC 1989
43
Which of the following hydrocarbons is not likely to be present in petrol?
  • A. C14H30
  • B. C10H22
  • C. C9H20
  • D. C7H16
  • E. C5H12
View Answer & Discuss (3) WAEC 1989
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44
The most suitable method to use when separating an insoluble solid from a liquid is
  • A. evaporation
  • B. filtration
  • C. magnetization
  • D. sublimation
  • E. distillation
View Answer & Discuss (2) WAEC 1989
45

The following are miscible with water except

  • A. ethylethanoate
  • B. methanol
  • C. ethanoic acid
  • D. methanoic acid
  • E. ethanol
View Answer & Discuss (5) WAEC 1989
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