From the given three equations, which metal will be the most reactive out of the given metals?
Zn + PbSO4 →ZnSO4 + Pb
Fe + CuSO4 →FeSO4 + Cu
Fe + ZnSO4 →FeSO4 + Zn
Fe
In 1st equation Zn displaces Pb. But in 2nd and 3rd chemical equation, Fe displaces both Cu and Zn. So, Fe is most reactive.