Which gas is responsible for the pungent smell in rotten eggs?
A
Ammonia
B
Methane
C
Sulfur dioxide
D
Hydrogen sulfide
Correct Answer: Option D — Hydrogen sulfide
Explanation:
Hydrogen sulfide gas produces the characteristic pungent odor of rotten eggs. This toxic gas is produced during the decomposition of organic matter and can be found in sewage, swamps, and certain industrial processes.