Multiple choice general knowledge science & technology

The gas usually filled in the electric bulb is

  1. nitrogen

  2. hydrogen

  3. carbon dioxide

  4. oxygen
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A Correct answer
Explanation

Incandescent bulbs are filled with nitrogen or argon gas to prevent the hot tungsten filament from oxidizing and burning out quickly. Hydrogen would react with the filament, carbon dioxide would decompose, and oxygen would accelerate filament burning.

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