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Chemistry WAEC Past Questions

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1876

Which of the following scientists formulated the law of conservation of mass?

  • A. A. Lavoisier
  • B. J. Dalton
  • C. R. Boyle
  • D. J. Proust
View Answer & Discuss WAEC 2022
1877

Which of the following sketches is a graphical representation of Boyle's law?

  • A. A
  • B. B
  • C. C
  • D. D
View Answer & Discuss (2) WAEC 2022
1878

The vapour density of an organic compound with the molecular formula \(C_2H_4O_2\), is
[H=1.0, C=12.0, O= 16.0]

  • A. 40
  • B. 120
  • C. 65
  • D. 30
View Answer & Discuss WAEC 2023
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1879

The following statements are correct except

  • A. energy is released when liquids change to solids.
  • B. carbon atoms in gaseous methane are further apart than those in solid diamond.
  • C. there is large decrease in the volume of a solid metal when pressure is applied to it.
  • D. particles move faster in the gaseous state than in the liquid state.
View Answer & Discuss (2) WAEC 2023
1880

Which of the following reactions represents the hydrolysis of an alkanoate?

  • A. \(CH_3COOH + OH^- ⇌H^+⇌ CH_3COO^- + H_2O\)
  • B. \(CH_3COOH + C_2H_5OH ⇌H^+⇌ CH_3COOC_2H_5 + H_2O\)
  • C. \(CH_3COOC_2H_5 + H_2O ⇌H^+⇌ CH_3COO^- + CH_3CH_2OH\)
  • D. \(CH_3COOCH_2CH_3 + H_2O ⇌H^+⇌ CH_3COOH + CH_3CH_2OH\)
View Answer & Discuss (5) WAEC 2023
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