1.

A test tube containing a nitrate and another containing a bromide and MnO_2 are treated with conc. H_2 SO_4. The brown fumes evolved are passed through water. The water will be coloured by

Answer»

the nitrate<BR>the bromide
both
none of the TWO

Solution :`NO_(3)^(-)` gives `NO_(2)` with conc. `H_(2)SO_(4)` which on passing through water form COLOURLESS `HNO_(3). Br^(-) +MnO_(2)`on heating with conc. `H_(2)SO_(4)` gives `Br_(2)` gas which ONE passing through water impart it a brown colour.


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