Multiple choice

Which of the following gases is used in bulb?

  1. O2

  2. Helium

  3. H2

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Inert gases like Argon are typically used in bulbs to prevent the filament from burning out. Helium is an inert gas, though Argon is more common; among the choices, Helium is the only inert gas.

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