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Which of the following reactions is both a displacement reaction and a redox reaction?

Answer and explanation

Correct answer: \(\mathrm{Zn + CuSO_4 \rightarrow ZnSO_4 + Cu}\)

In option A, zinc is more reactive than copper and displaces copper from \(\mathrm{CuSO_4}\). Zinc is oxidised because its oxidation number changes from \(0\) to \(+2\), whereas copper is reduced because its oxidation number changes from \(+2\) to \(0\). Therefore, this is both a displacement and a redox reaction. Option B is a double-displacement (precipitation) reaction, not a displacement reaction.

Related tags

Chemical ReactionsDisplacement ReactionRedox ReactionOxidation NumbersReactivity SeriesClass 10 Science

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