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Chemistry 1993 WAEC Past Questions

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1

Copper metal will react with concentrated trioxonitrate (V) acid to give?

  • A. Cu(NO3)3 + NO + N2O4 + H2O
  • B. Cu(NO3)2 + NO + H2O
  • C. CuO + NO2 + H2O
  • D. Cu(NO3)2 + 2NO2 + 2H2O
View Answer & Discuss (32) WAEC 1993
2
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
3
Starch undergoes complete hydrolysis to produce
  • A. maltose
  • B. lactose
  • C. fructose
  • D. glucose
  • E. sucrose
View Answer & Discuss WAEC 1993
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4

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
5
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
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