Science
The colour of the solution observed after 30 minutes of placing zinc metal to copper sulphate solution is
- Blue
- Colourless
- Dirty green
- Reddish Brown
Chemical Reaction
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Answer
Colourless
Reason — Zinc due to its high reactivity displaces copper from copper sulphate and forms zinc sulphate and thus copper gets deposited and the blue coloured solution becomes colourless.
Zn + CuSO4 ⟶ Cu + ZnSO4
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