1.

In a combination of NO_3^(-), Br^(-) and I^(-) present in a mixture, Br^(-) and I^(-) interfere in the ring test for NO_3^(-). These are removed by adding a solution of

Answer»

`AgNO_(3)`
`Ag_(2)SO_(4)`
`Ag_(2)CO_(3)`
None of these

Solution :`2Br^(-) +Ag_(2)SO_(4) to 2AgBr darr+SO_(4)^(2-)`
`2I^(-) +Ag_(2)SO_(4) to 2AgI darr+SO_(4)^(2-)`
ADDING `AgNO_(3)`(A) will introduce `NO_(3)^(-)` ions in the solution.


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