Civil Engineering - Waste Water Engineering - Discussion

38. 

If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains

[A]. Hydrogen sulphide
[B]. Carbon dioxide
[C]. Methane
[D]. Oxygen
[E]. None of these.

Answer: Option A

Explanation:

No answer description available for this question.

Dvs said: (Aug 22, 2017)  
Lead Acetate Test Paper detects Hydrogen Sulfide in water in concentrations as low as 5ppm.

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