Question

4) Explain why a metal lower in the activity series cannot replace a metal higher up in the activity series​

Answer 1

Explanation:

A less reactive metal cannot replace a more reactive metal from its salt solution in water.

In the reactivity series of metals in an arrangement of metals in the order of their decreasing reactivities. A more reactive metal can displace a less reactive metal from a solution of its salt.

For example:-CuSO4+Fe→FeSO4+Cu

Answer 2

Answer:

as the metal which  is lower in the reactivity series has a lower value thus cannot replace

eg

zinc + copper sulphate = zinc sulphate + copper