Hydrogen sulfide has which odor that is often described as a distinctive rotten egg smell?

Hydrogen sulfide has which odor that is often described as a distinctive rotten egg smell?

• A. chlorine smell
• B. no odor
• C. earthy odor
• D. rotten egg

Answer: (D)

Recognize the odor associated with hydrogen sulfide. Hydrogen sulfide has a distinctive rotten-egg smell, which is why it’s commonly used as a simple warning sign in water and sewer environments. This odor can be detected at very low concentrations, giving an early warning, but at higher concentrations it can numb the sense of smell, making odor alone an unreliable safety cue. The other scents don’t match hydrogen sulfide: a chlorine-like smell points to chlorine or chloramines, an earthy odor is more typical of geosmin or similar compounds, and some situations may have no odor at all, though hydrogen sulfide is known for its rotten-egg aroma.

Recognize the odor associated with hydrogen sulfide. Hydrogen sulfide has a distinctive rotten-egg smell, which is why it’s commonly used as a simple warning sign in water and sewer environments. This odor can be detected at very low concentrations, giving an early warning, but at higher concentrations it can numb the sense of smell, making odor alone an unreliable safety cue. The other scents don’t match hydrogen sulfide: a chlorine-like smell points to chlorine or chloramines, an earthy odor is more typical of geosmin or similar compounds, and some situations may have no odor at all, though hydrogen sulfide is known for its rotten-egg aroma.