2271Civil EngineeringMedium
For detecting the nitrites in the sewage, the matching colour may be developed by adding________?
ASulphuric acid and napthamine
BPotassium permanganate
CPhenol-di -sulphuric acid potassium hydroxide
DNone of these
Correct answer
A. Sulphuric acid and napthamine
Explanation
The correct answer is Sulphuric acid and napthamine.