Question

Nile Aakash solution why does an iron nail become brownish in colour and blue colour of copper sulphate solution fade​

Answer 1

Answer:

Copper is less reactive than Iron. So when an iron nail is dipped in a solution of CuSO4, it displaces copper from the Solution, which gets deposited or precipitated as a red or red-brown residue. Also the blue colour of the solution gradually fades. So Fe displaces Cu to form Iron Sulfate and Copper.

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