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    Question

    Which of the following is an elementary substance which

    is a good conductor of electricity but is not a metal?
    A Gallium Correct Answer Incorrect Answer
    B Caesium Correct Answer Incorrect Answer
    C Graphite Correct Answer Incorrect Answer
    D Phosphorus Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Graphite is a non- metal and it is only non-metal which is a good conductor of electricity. Option 1 & 2 are metals. Phosphorus is also a non-metal but it is poor conductor of electricity.

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