Gases used to fill inside a filament lamp:

  1. Argon, Nitrogen
  2. Oxygen, Nitrogen
  3. Carbon di oxide, Argon
  4. None

Answer (Detailed Solution Below)

Option 1 : Argon, Nitrogen
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Detailed Solution

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Concept:

  • Electric bulb: It is an electric device that converts electric energy into heat and light energy.
    • it is generally made of glass with inert gases filled in it (Nitrogen and argon).
    • The filament is made of tungsten which has a very high melting point.

Explanation:

  • The closed glass chamber of the electric bulb contains an inactive (inert) gas, Argon.
  • The glass chamber can’t be filled with air as the presence of oxygen will cause the filament to burn, i.e. react with oxygen.
  • The glass chamber can’t be made vacuum. As in vacuum conditions, the filament will evaporate because of very high temperature, making the bulb unusable.
  • The inert gas within the bulb will maintain a particular pressure, preventing the filament from evaporating. 
  • Nitrogen is also used like Argon


So, Gases used to fill inside a filament lamp Argon, Nitrogen.

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