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When an iron nail is placed in a blue copper sulphate solution, which substance is formed in the solution?

Answer and explanation

Correct answer: Iron sulphate

Iron is more reactive than copper, so it displaces copper from copper sulphate solution. The reaction is: \(\mathrm{Fe + CuSO_4 \rightarrow FeSO_4 + Cu}\). Therefore, iron sulphate is formed in the solution and copper is deposited on the nail. Zinc sulphate cannot form because zinc is not present in the reaction.

Related tags

ScienceClass10Chemical ReactionsDisplacement ReactionIronCopper Sulphate

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