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Copper deposits on an iron nail placed in copper sulphate solution. This observation is based on which principle?

Answer and explanation

Correct answer: A more reactive metal displaces a less reactive metal

The reaction is Fe + CuSO₄ → FeSO₄ + Cu. Iron lies above copper in the reactivity series, meaning iron loses electrons more readily and can displace copper ions from solution. Copper is then reduced to copper metal and deposits on the nail. Therefore, the governing principle is that a more reactive metal displaces a less reactive metal. The other statements are not general chemical principles.

Related tags

ScienceClass10MetalsReactivity SeriesDisplacementMetals And Non MetalsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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