Which gas has a rotten egg odor?

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Prepare for the ADEQ Wastewater Treatment 1 Test. Study with quizzes, multiple-choice questions, and detailed explanations. Ace your exam!

Multiple Choice

Which gas has a rotten egg odor?

Explanation:
Rotten egg odor comes from hydrogen sulfide. In wastewater settings, anaerobic bacteria break down sulfur-containing compounds, releasing H2S in places like sewer lines and sludge ponds. This distinctive rotten-egg smell is why H2S is associated with that odor. The other gases don’t have that scent: carbon dioxide and methane are odorless, and sulfur dioxide has a sharp, irritating odor different from rotten eggs. So the gas with the rotten egg smell is hydrogen sulfide.

Rotten egg odor comes from hydrogen sulfide. In wastewater settings, anaerobic bacteria break down sulfur-containing compounds, releasing H2S in places like sewer lines and sludge ponds. This distinctive rotten-egg smell is why H2S is associated with that odor. The other gases don’t have that scent: carbon dioxide and methane are odorless, and sulfur dioxide has a sharp, irritating odor different from rotten eggs. So the gas with the rotten egg smell is hydrogen sulfide.

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