For detecting the nitrates in sewage, the colour may be developed by a – McqOptions

MCQOPTIONS

1.	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» D. None of these.

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