Question

Which one of the following gases is used in electric bulbs?

• A. Oxygen
• B. Hydrogen
• C. Chlorine
• D. Argon

Answer 1

The correct option is D

Argon

Explanation for the correct option

(D) Argon

Inert gases

• The inert gas is inert in nature because they are non-reactive.
• They are highly stable due to their completely filled outermost shell.
• The elements are used in lamps, such as neon lights, krypton headlamps, and lasers.
• Helium is used in balloons because it is a lighter-than-air gas.

Gas used in electric bulbs

• Inert gases react with the burning filament of the light bulb.
• Argon is a gas that is widely used to fill incandescent light bulbs.
• It extends the life of the bulb by preventing the tungsten filament from deteriorating too rapidly.
• Other gases used in lightning include helium, neon nitrogen, and krypton.

Explanation for incorrect options

• Argon is widely used in electric bulbs.
• Hence all other options (A), (B) and (C) are incorrect.

Therefore, the correct option is (D) Argon.