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प्रश्न
What do you observe when a few pieces of iron are dropped in a blue solution of copper sulphate?
उत्तर
When a few pieces of iron are dropped into a blue coloured copper sulphate solution, the blue colour of the solution fades and eventually turns into light green.
\[\ce{Fe + CuSO4_{(aq)}-> FeSO4 + Cu}\]
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