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 isA. `K_(2)SO_(4)`B. `KCl`C. `Na_(2)SO_(4)`D. `K_(2)CO_(3)`

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 isA. `K_(2)SO_(4)`B. `KCl`C. `Na_(2)SO_(4)`D. `K_(2)CO_(3)`
Answer» Correct Answer - A 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 .

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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 isA. `K_(2)SO_(4)`B. `KCl`C. `Na_(2)SO_(4)`D. `K_(2)CO_(3)`

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