Question

Why does the colour of copper sulphate solution change when an iron nail is dipped in it?​​

Answer 1

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• When an iron nail dipped in the copper sulphate solution then iron displaces copper from the copper sulphate because iron is more reactive than copper.

Answer 2

• When an iron nail dipped in the copper sulphate solution then iron displaces copper from the copper sulphate because iron is more reactive than copper.