For detecting the nitrates in sewage, the matching colour may be devel – McqOptions

MCQOPTIONS

1.	For detecting the nitrates in sewage, the matching colour may be developed by adding:
A.	Potassium permanganate
B.	Sulphuric acid and napthamine
C.	Phenol-di-sulphonic acid and potassium hydroxide
D.	None of these
Answer» D. None of these

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