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Explain the observable change taking pla...

Explain the observable change taking place during reaction of iron with the aqueous solutions of `H_(2)SO_(4) and CuSO_(4)` respectively.

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Fe on treatment with `H_(2)SO_(4)` liberates hydrogen gas.
`Fe+H_(2)O_(4)toFeSO_(4)toH_(2)uarr`
The solution turns gree due to the formation of `FeSO_(4)`.
As Fe is more reactive than Cu , it displace Cu from `CuSO_(4)` solution . Hence blue colour of `CuSO_(4)` solution disappears.
`Fe+CuSO_(4)(aq)toFeSO_(4)+Cu`
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