When Iron nail is dipped in Copper sulphate solution the brown deposit observed on the Iron nail is

When iron nail is dipped in copper sulphate solution, iron displaces the copper metal in copper sulphate, and then Cu metal is formed (Brown deposit on the iron nail). The chemical equation is shown below.

$\begin{array}{l}{\text{CuSO}}_{\text{4}}\left(\text{aq}\right)+\text{\hspace{0.17em}\hspace{0.17em}Fe}\left(\text{s}\right)\to {\text{\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}FeSO}}_{\text{4}}\left(\text{aq}\right)+\text{\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}Cu}\left(\text{s}\right)\downarrow \\ \text{Green color\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}Brown color ppt}\end{array}$