Computer · Sewer Gas Detection
If a paper moistened with lead acetate solution turns black when suspended in a manhole, the sewer gas certainly contains:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Oxygen (O2)
- 2Methane (CH4)
- 3Carbon dioxide (CO2)
- 4Hydrogen sulphide (H2S)✓
Correct answer
Hydrogen sulphide (H2S)
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