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Chemistry, Science

10th -

11thgrade

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Metals Non metals

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22 questions

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  • 1. Multiple Choice
    30 seconds
    1 pt

    What happens when calcium is treated with water ?

    i) no reaction with water

    ii) violent reaction

    iii) less violent reaction

    iv) bubbles of H2 gas stick to the surface of calcium

    i and iv

    ii and iii

    i and ii

    iii and iv

  • 2. Multiple Choice
    30 seconds
    1 pt

    which of the following pair of metals exist in their native state in nature

    Au

    Ag

    Cu

    Al

    Ag and Cu

    Au and Cu

    Ag and Al

    Ag and Au

  • 3. Multiple Choice
    20 seconds
    1 pt

    electric wires have a coating of an insulating material. The material can be used

    Rubber

    plastic

    both rubber and plastic

    PVC

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