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Chemistry WAEC Past Questions

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756
A solution of a salt was acidified with HCI when a few drops of BaCI2 solution were added, a white precipitate was formed. Which of the following anions is present in the salt?
  • A. CO2- 3
  • B. NO- 3
  • C. SO2- 4
  • D. SO2- 3
View Answer & Discuss (2) WAEC 2008
757
Which of the following substances causes the depletion of the ozone layer in the atmosphere?
  • A. Carbon (IV) oxide
  • B. Chlorofluorocarbon
  • C. Sulphur (IV) oxide
  • D. Hydrocarbons
View Answer & Discuss WAEC 2008
758
Chemicals that are produced in small quantities and with very high degree of purity are
  • A. bulk chemicals
  • B. fine chemicals
  • C. heavy chemicals
  • D. light chemicals
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759

Aluminium is a good roofing material because it

  • A. is strong and does not conduct heat and electricity
  • B. readily absorbs light
  • C. forms an oxide film over its surface which prevents corrosion
  • D. is flexible and can conduct heat
View Answer & Discuss (3) WAEC 2008
760
Which of the following alloys is mainly used in making statues?
  • A. Brass
  • B. Bronze
  • C. Duralumin
  • D. Steel
View Answer & Discuss WAEC 2008
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