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What changes do you observe in the iron nails and colour of copper sulphate solution,

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What changes do you observe in the iron nails and colour of copper sulphate solution, if iron nails are dipped in CuSO4 solution for 15 minutes ?

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The Iron nail become brownish in colour and the blue colour of Copper sulphate solution fade, because Iron has displaced or removed another element, copper form Copper sulphate solution.

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