Question

when iron nail is dipped in copper sulphate than the colour change into green. why​

Answer 1

Answer:

Answer: When an iron nail immersed in the solution of copper sulphate than iron displaces copper from the solution of copper sulphate because iron is more reactive than copper. Therefore copper sulphate solution colour changes from blue to pale green

Answer 2

$\textsf{When an iron nail is dipped in copper}$ $\textsf{sulphate solution, a brown coating}$$\textsf{of copper is formed on the surface }$$\textsf{of iron and the colour of }$$\sf{CuSO_4 }$$\textsf{solution changes from blue to pale green.}$$\textsf{Iron is more reactive than copper}$$\textsf{because it displaces copper from the}$$\textsf{solution of}$$\sf{CuSO_4 ,}$$\textsf{forming }$$\sf{FeSO_4}$$\textsf{solution.}$

$\sf{\bf{\underline{Reaction~ Below:-}}}$

$\sf{CuSO_4 + Fe → FeSO_4 + Cu}$