Question

copper sulphate is blue and acquires a ______
colour when iron
fillings dropped into it
​

Answer 1

When an iron nail immersed in the solution of copper sulphate than iron displaces copper from the solution of copper sulphate because iron is more reactive than copper. Therefore copper sulphate solution colour changes from blue to pale green.

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Answer 2

Answer:

Green

Explanation:

The Copper Sulphate (CuSO4) changes to Ferrous Sulphate (FeSO4), hence the green colour.

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