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    Question

    What happens if an iron nail gets immersed in CuSO4

    solution for few minutes?
    A no reaction takes place Correct Answer Incorrect Answer
    B the colour of solution fades away Correct Answer Incorrect Answer
    C the colour of solution changes to green Correct Answer Incorrect Answer
    D the surface of iron nails acquire a black coating Correct Answer Incorrect Answer

    Solution

    When an iron nail is dipped in copper sulphate solution, a brown coating of copper is formed on the surface of iron and the colour of copper sulphate solution changes from blue to light green.

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