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Everyday Science Easy PMS Uploaded: 01 Sep 2026

Which of the following is the lightest gas?

  • A Oxygen
  • B Nitrogen
  • C Helium
  • D Hydrogen
Correct Answer: Option D — Hydrogen
Explanation:
Hydrogen is the lightest and most abundant element in the universe, with the lowest atomic mass among all gases.
Submitted by: PaperMCQs
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