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When an iron nail is placed in copper sulphate solution, what is the reddish-brown coating formed on the nail?

Answer and explanation

Correct answer: Copper

Iron is more reactive than copper, so it displaces copper from copper sulphate solution: \(\mathrm{Fe + CuSO_4 \rightarrow FeSO_4 + Cu}\). The released copper deposits on the iron nail as a reddish-brown coating. Iron sulphate is formed in the solution, while zinc is not involved in this reaction.

Related tags

Class 10 ScienceChemical ReactionsDisplacement ReactionReactivity SeriesIronCopper Sulphate

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