Electric bulbs (fill gas): Identify the gas usually filled in incandescent electric bulbs to protect the filament. Consider inertness and prevention of filament oxidation at working temperature. Choose the correct gas.
General Knowledge
General Science
Difficulty: Easy
Choose an option
Answer
Correct Answer: Nitrogen
Explanation
Given data
- Ask: Gas used inside incandescent bulbs.
Concept/Approach Incandescent bulbs are filled with inert/neutral gases (commonly nitrogen, often mixed with argon) to prevent tungsten oxidation and to reduce filament evaporation.
Common pitfalls Oxygen would quickly oxidize the filament; hydrogen/CO2 are not used for this purpose.
Final Answer Nitrogen