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3326

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
3327

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 WAEC 2018
3328

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 (1) WAEC 2018
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3329

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
3330

Consider the following reaction equation: \(2HCl + Ca(OH)_{2} \to CaCl_{2} + H_{2}O\). What is the volume of 0.1\(moldm^{-3}\) HCl that would completely neutralize 25\(cm^{3}\) of 0.3\(moldm^{-3}\) Ca(OH)\(_{2}\)?

  • A. 150\(cm^{3}\)
  • B. 75\(cm^{3}\)
  • C. 30\(cm^{3}\)
  • D. 25\(cm^{3}\)
View Answer & Discuss WAEC 2018
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