Civil Engineering - Waste Water Engineering - Discussion

2. 

For detecting the nitrates in sewage, the colour may be developed by adding

[A]. Pottassium permanganate
[B]. Sulphuric acid and napthamine
[C]. Phenol-di-sulphuric acid and pottassium hydroxide
[D]. None of these.

Answer: Option C

Explanation:

No answer description available for this question.

Patrick Dizon said: (Jul 31, 2016)  
Why not Sulphuric acid and napthamine?

Luckyarru said: (Apr 16, 2017)  
@Patrick.

Sulphuric acid and napthamins is true for nitrite.

Rahul Kumar said: (Dec 13, 2018)  
C is the correct answer because it has a nitrat, not nitrite.

For nitrite - sulfuric acid and Nepthamine

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