1.

BaCl_2 solution gives a white ppt. with a solution of a slat, which dissolves in dil. HCl with the evolution of a colourless, pungent smelling gas. The radical in the salt is

Answer»

`SO_(4)^(2-)`
`HSO_(4)^(-)`
`SO_(3)^(2-)`
`CO_(3)^(2-)`

Solution :`SO_(3)^(2-) +BA^(2+) to underset("White ppt.")(BaSO_(3) darr)`
`BaSO_(3)+2HCL to BaCl_(2) +H_(2)O +underset("smelling gas")underset("Pungent")(SO_(2) uarr)`


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