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Why does copper deposit on the surface of an iron nail placed in copper sulphate solution?

Answer and explanation

Correct answer: Iron displaces copper from copper sulphate solution

Iron is more reactive than copper in the reactivity series. Therefore, iron displaces copper from copper sulphate solution. The liberated copper forms a reddish-brown deposit on the nail surface. The reaction is \(\mathrm{Fe + CuSO_4 \rightarrow FeSO_4 + Cu}\). Option B is incorrect because the less reactive metal, copper, cannot displace iron from its compound.

Related tags

Class 10 ScienceChemical ReactionsDisplacement ReactionReactivity SeriesCopper SulphateIron Nail

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