Question

............... Is used for filling an electrical bulb

Answer 1

You can't fill a bulb with air or combustion of hot tungsten wire at high temperature will take place in presence of oxygen. You can't maintain vacuum either or external atmospheric pressure will break the glass. So, you have to fill it with non-reactive gas like nitrogen.

Answer 2

Answer:

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Explanation:

Dinitrogen does not burn or support combustion . Thus N2(g) is used to provide an inert atmosphere during welding and for certain metallurgical processes where oxidation might otherwise occur and for filling electrical lamps. ...

SO ,NITOGEN is used for filling an electrical bulb.