1.

A test tube containing a nitrate and another containing a bromide and MnO_(2) are treated with concentrated H_(2)SO_(4).The reddish 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 concentrated `H_(2)SO_(4)` which on passing through water form colourless `HNO_(3)(l)` and `HNO_(2)(l)`
`Br^(-)+MnO_(2)` on heating with concentrated `H_(2)SO_(4)` gives `Br_(2)` gas which on passing through water imparts it a reddish brown COLOUR.


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