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InterviewSolution
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Why does the iron nail become brownish in colour and the blue colourof copper sulphate solution fade? |
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Answer» 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. Here, Fe is more reactive than Cu. So Fe displaces Cu to form Iron Sulphate and Copper. |
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