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Chemistry 1989 WAEC Past Questions

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1

The major raw material in a plastic industry is

  • A. ethanol
  • B. sulphur
  • C. methylethanoate
  • D. ethene
  • E. ethane
View Answer & Discuss (4) WAEC 1989
2
Which of the following reactions represents the laboratory preparation of hydrogen?
  • A. C(s) + H 2 O(l) → CO(g) + H2(g)
  • B. 2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)
  • C. Zn(s) + 2HCI(aq) → ZnCI2(aq) + H2(g)
  • D. Cu(s) + H2O(l) → CuO(s) + H2(g)
  • E. 2AI(s) + 3H2O(l) → Al2O3(s) + 3H2(g)
View Answer & Discuss (7) WAEC 1989
3
Which of the following statements best explains cracking ? It is a process
  • A. in which an alkene adds on itself repeatedly to form long chain polymers
  • B. in which large hydrocarbon molecules are broken into smaller units
  • C. for measuring theoctane number of petrol
  • D. in which carbon chain results in a zigzag arrangement
  • E. in which aromatic hydrocarbons are produced
View Answer & Discuss (2) WAEC 1989
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4

120cm\(^3\) of hydrogen were sparked with 60cm\(^3\) of oxygen at 110\(^o\)C. What was the volume of steam produced? The equation for the reaction is 

  2H\(_2\)(\(_g\)  +   O\(_2\)(\(_g\) →  2H\(_2\)O\(_g\)

  • A. 30cm3
  • B. 60cm3
  • C. 90cm3
  • D. 120cm3
  • E. 180cm3
View Answer & Discuss (5) WAEC 1989
5
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
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