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Everyday Science Medium NTS Uploaded: 01 Sep 2026

The gas that causes the pungent smell in rotten eggs is:

  • A Sulfur dioxide
  • B Ammonia
  • C Methane
  • D Hydrogen sulfide
Correct Answer: Option D — Hydrogen sulfide
Explanation:
Hydrogen sulfide gas is produced by the decomposition of organic matter and has a distinctive smell resembling rotten eggs.
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