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Chemistry 1992 WAEC Past Questions

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1

When steam is passed over white-hot coke, the products are

  • A. carbon (IV) oxide and nitrogen
  • B. carbon (II) oxide and hydrogen
  • C. carbon (ll) oxide and nitrogen
  • D. carbon (lV) oxide and steam
View Answer & Discuss (7) WAEC 1992
2
The maximum number of electrons that can accommodated in the shell having the principal quantum number 3 is
  • A. 3
  • B. 9
  • C. 10
  • D. 18
  • E. 32
View Answer & Discuss (7) WAEC 1992
3
Methanol is obtained from wood by
  • A. esterification
  • B. bacterial decomposition
  • C. combustion
  • D. fractional distillation
  • E. destructive distillation
View Answer & Discuss WAEC 1992
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4

Study carefully the reaction represented by the equation below. 2H2O 2(l) → O 2(g) + 2H2O(l). Which of the following will not reaction increase the reaction rate?

  • A. Heating the hydrogen peroxide
  • B. Adding a pinch of MnO2 to the reactant
  • C. increasing the concentration of the H2O2
  • D. Adding water to the reactant
  • E. Exposing the reactant to sunlight
View Answer & Discuss (3) WAEC 1992
5
Which of the following processes is a physical reaction?
  • A. Electrolysis
  • B. Hydrolysis
  • C. Allotropic change
  • D. Neutralization
  • E. Corrosion
View Answer & Discuss (2) WAEC 1992
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