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प्रश्न
When ammonium hydroxide is added to a solution B, a pale blue precipitate is formed. The pale blue precipitate dissolves in excess of ammonium hydroxide to give an inky blue solution. What is the cation (positive ion) present in solution B? What is the probable colour of solution B?
एका वाक्यात उत्तर
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उत्तर
The cation is Cu2+ ion. Solution B is copper sulphate. It is bright blue in colour.
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