On adding conc. H_2SO_4to a salt, brown colouration was observed on th – InterviewSolution

1.	On adding conc. H_2SO_4to a salt, brown colouration was observed on the walls of the test tube, On heating, violet coloured vapours were evolved. The brown colouration is due to the formation of
Answer» `l_(2)`(s) L `l_(3)^(-)` Hl Answer :C

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