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Chemistry Past Questions

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1836
Which of the following separation is routinely applied in the petroleum industry
  • A. Filtration
  • B. Chromatography
  • C. Evaporation
  • D. Fractional crystallization
  • E. Fractional distillation
View Answer & Discuss WAEC 1993
1837
Starch undergoes complete hydrolysis to produce
  • A. maltose
  • B. lactose
  • C. fructose
  • D. glucose
  • E. sucrose
View Answer & Discuss WAEC 1993
1838

Which of the following solids has a network structure?

  • A. Diamond
  • B. lodine
  • C. Sulphur
  • D. Graphite
  • E. lron
View Answer & Discuss (6) WAEC 1993
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1839
Trioxosulphate (lV) acid is not stored for a long period because it
  • A. is a weak dibasic acid
  • B. has bleaching properties
  • C. is unstable and eaily decomposed
  • D. smells strongly of sulphur (lV) oxide
  • E. can act as a germicide
View Answer & Discuss WAEC 1993
1840
Alkanes are used mainly
  • A. in the production of plastics
  • B. as domestic and industrial fuels
  • C. in the textile industry
  • D. in the hydrogenation of oils
  • E. as fine chemicals
View Answer & Discuss (1) WAEC 1993
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