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8th Class Science Sample Paper Science Olympiad Model Test Paper-9

  • question_answer
    In which one of the following cases chemical changes will take place?

    A)  When a current is passed through a gold wire

    B)  When a current is passed through a copper wire

    C)  When a current is passed through a silver wire

    D)  When a current is passed through a sulphuric-acid solution

    E)  None of these

    Correct Answer: D

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