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

Chemistry WAEC 2021

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

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

  • A\(^{3+_{(aq)}}\)+3e\(^{-}\) \(\rightarrow\) A\(_{(s)}\)
  • B\(^{2+_{(aq)}}\)+2e\(^{-}\) \(\rightarrow\) B\(_{(s)}\) checkmark
  • A\(_{(s)}\) \(\rightarrow\) \(^{3+_{(aq)}}\)+3e\(^{-}\)
  • B\(_{(s)}\) \(\rightarrow\) B\(^{2+_{(aq)}}\) + 2e\(^{-}\)

The correct answer is: B

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