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    Question

    Metals are good conductors of electricity because –

    A they contain free electrons Correct Answer Incorrect Answer
    B the atoms are lightly packed Correct Answer Incorrect Answer
    C they have high melting point Correct Answer Incorrect Answer
    D All of the above Correct Answer Incorrect Answer

    Solution

    Copper is used for electrical wiring because it is a good conductor of electricity. Metal particles are held together by strong metallic bonds, which is why they have high melting and boiling points.

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