For detecting the nitrites in the sewage, the matching colour may be d – McqOptions

MCQOPTIONS

1.	For detecting the nitrites in the sewage, the matching colour may be developed by adding
A.	Pottassium permanganate
B.	Sulphuric acid and napthamine
C.	Phenol-di-sulphuric acid pottassium hydroxide
D.	None of these.
Answer» C. Phenol-di-sulphuric acid pottassium hydroxide

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