A white solid imparts a violet colour to a Bunsen flame. On being heated with concentrated H2SO4, the solid gives violet vapours that turns starch paper blue. The salt may be:

Question

Prashant Kotian · Accepted Answer

Correct answer: B. Step 1: The violet flame test is characteristic of potassium (K+) ions. Step 2: Reacting with hot concentrated H2SO4, chloride salts release hydrogen chloride (HCl) gas, which has a pungent odor and reacts with silver nitrate (AgNO3) to form a white precipitate of AgCl that dissolves in ammonia. Step 3: Combining potassium and chloride, the salt is potassium chloride (KCl), matching option (b).

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