The salt of an alkali metal gives violet colour in the flame test . Its aqueous solution gives a white precipitate with barium chloride in hydrochloric acid medium . The salt is

The salt of an alkali metal gives violet colour in the flame test . It

1.	The salt of an alkali metal gives violet colour in the flame test . Its aqueous solution gives a white precipitate with barium chloride in hydrochloric acid medium . The salt is
Answer» `K_(2)SO_(4)` `KCl` `Na_(2)SO_(4)` `K_(2)CO_(3)` SOLUTION :K imparts VIOLET colour to the flame and `SO_(4)^(2-)` IONS produce white ppt. of `BaSO_(4)` when treated `K_(2)SO_(4) + BaCl_(2) to underset("White ppt.")(BaSO_(4)) darr + 2 KCl` with an aqueous solution of `BaCl_(2)` . Thus , option (a) is correct .