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  1. Electric bulbs are filled with :

    2. A.

     Nitrogen
    B.

     Carbon dioxide
    C.

     Argon
    D.

     Oxygen

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    Answer : Option C

    Explanation :

    Filling a bulb with an inert gas such as argon or nitrogen slows down the evaporation of the tungsten filament compared to operating it in a vacuum.

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