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Chemistry WAEC Past Questions

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1776

Which of the following illustrates the variation of the rate of evolution of gas from a given length of magnesium ribbon (y-axis) with an increase in the concentration of the added (x-axis)?

  • A. I
  • B. II
  • C. III
  • D. IV
View Answer & Discuss (5) WAEC 2021
1777

Which of the graphs illustrates the variation of the pH of a given volume of strong acid solution (y-axis) with the volume of strong base titrated against its (x-axis)?

  • A. I
  • B. II
  • C. III
  • D. IV
View Answer & Discuss (3) WAEC 2021
1778

Which of the graphs illustrates the variation of the solubility of a salt in water (y-axis), with an increase in temperature (x-axis) if the dissolution process is exothermic?

  • A. I
  • B. II
  • C. III
  • D. IV
View Answer & Discuss (1) WAEC 2021
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1779

The formation of ethene from dehydration of ethanol can be described as-------

  • A. an addition reaction
  • B. an elimination reaction
  • C. an oxidation reaction
  • D. a substitution reaction
View Answer & Discuss (2) WAEC 2021
1780

Which of the following gasses is highly soluble in water at room temperature

  • A. ammonia
  • B. carbon (IV) oxide
  • C. chlorine
  • D. nitrogen
View Answer & Discuss (3) WAEC 2021
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