Question

which is the most reactive element Ag, Pb, Cu, Zn​

Answer 1

Zn (zinc) is the most reactive element among these four.

Answer 2

Zinc is the most reactive element among others. they are consider as less reducing agents that has been covered with its completion by taking metal ions in the more reactive one.

This supposes to consider less reactive and able to deliver in the form of accepting electrons. It says zinc displays the copper ions from its solution. It acts with metal ions that are more reactive.