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Chemistry WAEC Past Questions

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1196

The most suitable substance for putting out petrol fire is

  • A. water
  • B. carbon(IV) oxide
  • C. fire blanket
  • D. sand
View Answer & Discuss WAEC 2018
1197

The following factors would contribute to environmental pollution except

  • A. production of ammonia
  • B. manufacture of cement
  • C. photosynthesis
  • D. combustion
View Answer & Discuss WAEC 2018
1198

The position of equilibrium in a reversible reaction is affected by

  • A. particle size of the reactants
  • B. vigorous stirring of the reaction mixture
  • C. presence of a catalyst
  • D. change in concentration of the reactants
View Answer & Discuss (2) WAEC 2018
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1199

The diagram above illustrates a conical flask containing water and ice. Which of the following is correct about the diagram?

  • A. The water is at lower temperature than the ice
  • B. Energy is absorbed when the ice changes to water
  • C. Energy is released when the ice changes to water
  • D. The water molecules vibrate about a fixed point
View Answer & Discuss (3) WAEC 2018
1200

Which of the following statements best explains the difference between a gas and a vapour?

  • A. Unlike gases, vapours are liquids at room temperature
  • B. Unlike gases, vapour can easily be condensed into liquids
  • C. Unlike gases, vapour is readily converted into solids
  • D. Vapours are generally denser than gases
View Answer & Discuss (4) WAEC 2018
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