Question

what happens when a piece of iron metal is placed in copper sulphate solution

Answer 1

iron displaces copper from its solution and the colour of solution changes to blue from Green this process is known as displacement reaction
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Answer 2

Hi,
Iron displaces copper from thesulphate solution leading to formation of ferrous sulphateand copper. ... This is a displacement reaction in which a more reactive metal displaces a less reactive metal from its salt solution.

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