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Which of the following reactions is an example of a displacement reaction?

Answer and explanation

Correct answer: Zn + CuSO₄ → ZnSO₄ + Cu

The correct answer is A: Zn + CuSO₄ → ZnSO₄ + Cu. In a displacement reaction, a more reactive element takes the place of a less reactive element in its compound. Zinc is more reactive than copper, so zinc removes copper from copper sulfate and forms zinc sulfate; copper is released. Option B is a combination reaction because two reactants form one product, calcium hydroxide. Option C is a decomposition reaction because one compound breaks into simpler substances. Option D is a neutralisation and double-displacement reaction in which acid and base exchange ions to form salt and water. The key pattern for A is element + compound → new compound + displaced element.

Related tags

Displacement ReactionReactivity SeriesChemical ReactionsClass 10 ScienceChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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