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Which statement is correct when an iron nail is placed in copper sulphate solution?

Answer and explanation

Correct answer: Iron displaces copper from copper sulphate

Iron is more reactive than copper. Therefore, iron displaces copper from copper sulphate solution: \(\mathrm{Fe + CuSO_4 \rightarrow FeSO_4 + Cu}\). A reddish-brown coating of copper forms on the nail, and the blue solution turns pale green. In contrast, copper cannot displace iron from its salt because copper is less reactive.

Related tags

ScienceClass 10Chemical ReactionsDisplacement ReactionReactivity SeriesCopper Sulphate

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