A mixture when heated with dil. H_2SO_4 does not evolve brown vapours – InterviewSolution

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1.	A mixture when heated with dil. H_2SO_4 does not evolve brown vapours but when heated with conc. H_2SO_4brown vapours are obtained. The vapours when brought in contact with aqueous AgNO_3 solution do not give any precipitate. The mixture contains :
Answer» `NO_2^(-)`<BR>`CL^(-)` `Br^(-) ` `NO_3^(-)` ANSWER :D

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