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Copper sulphate solution
Iron nail
a): Iron nail and iron nails dipped in copper sulphate solution explain it ​

Answer 1

Answer:

When an iron nail is dipped in copper sulphate solution, a brown coating of copper is formed in the surface of iron and the colour of copper sulphate solution changes from blue to pale green. The reaction shows that iron is more reactive than copper because it displaces copper from the copper sulphate solution.

Answer 2

When iron nails are dipped in copper sulfate solution , iron nails get the coating of brown colored substance which is copper. This happens due to displacement reaction. As Fe(iron) is more reactive than copper so the iron displaces the copper from its salt solution (CuSO4) and thereby making FeSO4(ion sulphate)

Reaction:

Fe(iron nail) + CuSO4(copper Sulphate) --> FeSO4(iron sulphate) + Cu(copper)

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