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Chemistry Past Questions

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1431
Alkanes
  • A. are all gases
  • B. have the general formula CnH2n + 2O
  • C. contain only carbon and hydrogen
  • D. are usually soluble in water
  • E. are usually active compounds
View Answer & Discuss (4) JAMB 1984
1432

If an excess of a liquid hydrocarbon is poured into a jar of chlorine, and the sealed jar is then exposed for several hours to bring sunlight, all the chlorine gas is consumed. The hydrocarbon is said to have undergone

  • A. a polymerization reaction
  • B. an isomerization reaction
  • C. an addition reaction
  • D. a substitution reaction
  • E. a reduction reaction
View Answer & Discuss (2) JAMB 1984
1433
The function of conc. H2SO4 in the esterification of ethanoic acid with ethanol is to
  • A. serve as a dehydrating agent
  • B. serve as a solvent
  • C. act as a catalyst
  • D. prevent any side reaction
  • E. serve as an oxidizing agent
View Answer & Discuss (13) JAMB 1984
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1434
A piece of sea shell, when dropped into a dilute solution of hydrochloric acid, produces a colourless, odourless gas which turns clear limewater milky. The sea shell contains
  • A. sodium chloride
  • B. ammonium nitrate
  • C. calcium carbonate
  • D. calcium chloride
  • E. magnesium chloride
View Answer & Discuss (6) JAMB 1984
1435
Which of the following electrodes is used in electrolysis of bauxite (Al2O3) in molten cryolite?
  • A. Steel electrodes
  • B. Carbon electrodes
  • C. Mercury electrodes
  • D. Carbon anode and steel cathode
  • E. Carbon cathode and stell anode
View Answer & Discuss (1) JAMB 1984
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