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Chemistry 1998 WAEC Past Questions

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1
AN AQUEOUS SOLUTION IS ACIDIC IF
  • A. its pH value is high
  • B. it s corrosive
  • C. it changes the colour of litmus
  • D. it has a bitter taste
  • E. it contains more H3O- than OH-
View Answer & Discuss WAEC 1998
2
The following oxides react with water except
  • A. Na2O
  • B. SO3
  • C. NO2
  • D. CO2
  • E. CuO
View Answer & Discuss (4) WAEC 1998
3
Which of the following is not a property of trioxonitrate (V) salts?
  • A. Positive reaction to the brown ring test
  • B. Ability to dissolve in cold water
  • C. Decomposition on being strongly heated
  • D. Production of effervescence with saturated Na2CO3 solution
  • E. Evolution of gas with concentrated H2SO4 and copper turnings
View Answer & Discuss (1) WAEC 1998
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4
Which of the following methods is suitable for the preparation of an insoluble salt?
  • A. Action of an acid on a metal
  • B. Double decomposition
  • C. Neutralisation
  • D. Action of an acid on a trioxocarbonate (IV)
  • E. Action of an acid on an oxide
View Answer & Discuss WAEC 1998
5
What is the function of sulphur (IV) oxide in the reaction represented by the following equation? SO 2(aq) + 2H2S(g) → 3S (s) + 2H 2O (l)
  • A. Dehydrating agent
  • B. Oxidising agent
  • C. Bleaching agent
  • D. Acid
  • E. Precipitant
View Answer & Discuss (1) WAEC 1998
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