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Chemistry Past Questions

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
2326
The oxidation number of iodine in the iodate ion (IO -3) is
  • A. -5
  • B. -1
  • C. +1
  • D. +5
View Answer & Discuss WAEC 2006
2327
Metals can be extracted from their ores by a process involving
  • A. reduction
  • B. oxidation
  • C. hydrolysis
  • D. decomposition
View Answer & Discuss (3) WAEC 2006
2328
Consider the reaction: 2AI(s) + 6H+ (aq) → 2AI3+ (aq) + 3H2(g). What is the total number of moles of electrons transferred from the aluminium atoms to the hydrogen ions?
  • A. 3
  • B. 4
  • C. 5
  • D. 6
View Answer & Discuss (3) WAEC 2006
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2329
In the reaction represented by the equation. 5Fe 2+ (aq) + MnO- 4(aq) + 8H+ (aq) → 5Fe3+(aq) + Mn2+(aq) + 4H2O(l) which species is reduced?
  • A. Fe2+
  • B. MnO-4
  • C. H+
  • D. Fe3+
View Answer & Discuss (3) WAEC 2006
2330
Which of the following industrial processes is chlorines not used?
  • A. Production of polyvinylchloride (PVC)
  • B. Manufacturing of hydrochloric acid
  • C. Manufacturing of common salt
  • D. Manufacturing of domestic bleach
View Answer & Discuss (3) WAEC 2006
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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