As seen in the figure, two nails are carefully dipped in copper sulphate solution with the help of threads. What will happen when the nails are removed after half an hour?

Nails turn blue in colour

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Nails turn green in colour

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Nails turn brown in colour

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No change is observed

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Solution

The correct option is C
Nails turn brown in colour

The nail colour changes to brown due to the displacement of copper metal by iron metal from the solution.
When iron nails are dipped in copper sulphate solution, displacement reaction takes place.
Fe_(s) + CuSO_4(aq) → FeSO_4(aq) + Cu_(s)

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As seen in the figure, two nails are carefully dipped in copper sulphate solution with the help of threads. What will happen when the nails are removed after half an hour?

The correct option is C Nails turn brown in colour The nail colour changes to brown due to the displacement of copper metal by iron metal from the solution. When iron nails are dipped in copper sulphate solution, displacement reaction takes place. Fe(s) + CuSO4(aq) → FeSO4(aq) + Cu(s)

The correct option is C
Nails turn brown in colour

The nail colour changes to brown due to the displacement of copper metal by iron metal from the solution.
When iron nails are dipped in copper sulphate solution, displacement reaction takes place.
Fe_(s) + CuSO_4(aq) → FeSO_4(aq) + Cu_(s)