Question

why iron nail become brownish in colour and the blue colour of copper sulphate solution fades ?​

Answer 1

Explanation:

it is due to displacement reaction.

because copper is least reactive than iron so iron can displace cupper .

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Answer 2

Iron nail become brownish in colour and the blue colour of copper sulphate solution fades because iron displaces copper from copper sulphate as iron is more reactive than copper.

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