Arrange the following in the order in which they displace each other from the solution of their salts. Al, Cu, Fe,Mg and Zn

Explanation

The standard reduction potential of these metals are `-1.66 ~V,+0.34,-0.44 ~V_0-2.37 ~V-` and `-`
0. 76 respectively. The lower the reduction potential, more the tendency to lose electrons and thus more will be the displacement power. Thus the decreasing order of displacement power is `MggtAlgt` `ZngtFegtCu`