Multiple choice

______________ is a chemically inactive gas present in the atmosphere.

  1. Argon

  2. Nitrogen

  3. Oxygen

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

Argon is a noble gas with a complete outer electron shell, making it chemically inactive and unreactive under normal conditions. It constitutes about 0.93% of Earth's atmosphere. Nitrogen is relatively inert but can form compounds; oxygen is highly reactive. Argon's inertness makes it useful in welding and light bulbs.

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