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Chemistry WAEC Past Questions

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1791

Which of the following statements about Group VII elements is correct?

  • A. they are present in the same physical state
  • B. they are strong reducing agents
  • C. their reactivity decreases down the group
  • D. they exist as monoatomic molecules
View Answer & Discuss (2) WAEC 2021

Consider the following diagram and use it to answer the question below

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1792

Which of the following cell notations represent the diagram?

  • A. B\(^{2+}\)/B/ /A/A\(^{3+}\)
  • B. A\(^{3+}\) /A/ /B/B\(^{2+}\)
  • C. B/B\(^{2+}\)/ /A/\(^{3+}\)
  • D. A/A\(^{3+}\)/ /B\(^{2+}\)/B
View Answer & Discuss (3) WAEC 2021
1793

Which of the following half reaction equations represent the reaction at the cathode

  • A. A\(^{3+_{(aq)}}\)+3e\(^{-}\) \(\rightarrow\) A\(_{(s)}\)
  • B. B\(^{2+_{(aq)}}\)+2e\(^{-}\) \(\rightarrow\) B\(_{(s)}\)
  • C. A\(_{(s)}\) \(\rightarrow\) \(^{3+_{(aq)}}\)+3e\(^{-}\)
  • D. B\(_{(s)}\) \(\rightarrow\) B\(^{2+_{(aq)}}\) + 2e\(^{-}\)
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1794

The reactivity of fluorine is high because of 

  • A. its high electronegativity
  • B. the small size of the fluorine atom
  • C. the availability of d-orbitals
  • D. the strong F-F bond
View Answer & Discuss (1) WAEC 2021
1795

How many coulombs of electricity would liberate 1.08g of Ag from a solution of silver salt?

[Ag = 108.0; 1F = 96500 C]

  • A. 96500 C
  • B. 9650 C
  • C. 965 C
  • D. 9.65 C
View Answer & Discuss (1) WAEC 2021
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