1.

A salt solution is acidified with dil. HCl and BaCl_2 solution is added. A white ppt. is formed. The salt contains

Answer»

`CL^(-)`
`Br^(-)`
`NO_(3)^(-)`
`SO_(4)^(2-)`

Solution :`SO_(4)^(2-) +BaCl_(2) overset(HCl)to UNDERSET("White ppt.")(BaSO_(4) darr)+2Cl^(-)`
White ppt. of `BaSO_(4)` is insoluble in dil. HCl and other MINERAL acids.


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