Question

Why does the blue colour of copper sulphate turn pale green when an iron nail is dipped in it for twenty minutes?

Answer 1

Why does the blue colour of copper sulphate turn pale green when an iron nail is dipped in it for twenty minutes?.
Ans. The blue colour of Copper sulphate turn pale green when an Iron Nail is dipped in it for twenty minutes. A chemical reaction takes place between the Copper Sulphate solution and the Iron, the Iron being more reactive than Copper, it displaces Copper and form Ferrous Sulphate....having green colour....
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