To monitor oxides of nitrogen in stack effulents, the sample containin – McqOptions

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1.	To monitor oxides of nitrogen in stack effulents, the sample containing oxides of nitrogen is passed through a flask containing solution of H₂O₂ in sulphuric acid. Nitric acid is formed. The nitrate ions then react with phenol-disulphonic acid to produce blue colour.
A.	True
B.	False
Answer» C.

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