1.

Reddish brown gas is obtained when the following are treated with conc. H_(2)SO_(4)

Answer»

Be
`NO_(2)^(-)`
`NO_(3)`
`l^(-)`

Solution :`Br^(-)` gives `Br_(2).NO_(2)^(-)` and `NO_(3)^(-)` gives `NO_(2)` gas which are reddish BROWN in colour.
Hence, (A), (B) and (C) are the CORRECT answers.


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