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1701
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
1702

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
1703
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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1704
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 (4) WAEC 1989
1705
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
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