The aqueous solution of transition metal salt changes colour from pink to blue, when concentrated hy — d and f Block Elements Chemistry Question
Question
The aqueous solution of transition metal salt changes colour from pink to blue, when concentrated hydrochloric acid is added to it. The change in colour is due to :
Answer: B
💡 Solution & Explanation
Step 1: 'Vitriols' are a family of hydrated sulfate salts of transition metals. Step 2: White vitriol is specifically the heptahydrate form of zinc sulfate. Step 3: Its chemical formula is ZnSO4 . 7H2O, which corresponds to option (c).
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