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Question
The reddish brown deposit formed on iron nails kept in a solution of copper sulphate is
- Cu2O
- Cu
- CuO
- CuS
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Solution
(b) Cu.
When iron nails are kept in a copper sulphate solution, the more reactive element iron displaces the less reactive element copper from copper sulphate and forms ferrous sulphate.
Fe(s) + CuSO4(aq) → FeSO4(aq) + Cu(s)
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