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प्रश्न
Give an example of the following chemical changes.
A reaction involving blue solution.
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उत्तर
\[\ce{\underset{[iron]}{Fe} + \underset{[blue solution]}{CuSO4_{(aq)}} ->\underset{[green solution]}{FeSO4} + \underset{(brown/red deposit)}{\underset{[copper]}{Cu}}}\]
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