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What changes in the colour of iron nails and copper sulphate solution do you observe after keeping the iron nails dipped in copper sulphate solution f

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What changes in the colour of iron nails and copper sulphate solution do you observe after keeping the iron nails dipped in copper sulphate solution for about 30 minutes?
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Iron nails get covered with a red-brown coating of copepr metal, the blue colour of copper sulphate solution fades gradually
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