Which element can be used to prevent evaporation of the filament of an electric bulb?

Neon

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Argon

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Radon

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Helium

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Solution

The correct option is B
Argon

Argon gas is filled in electric bulbs to prevent evaporation of its filament. It stops the oxygen in the light bulbs from corroding the hot tungsten filament, which results in increased life for the light bulb.

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