Question

Why can 't less reactive metal displace a more reactive metal?

Answer 1

because its a rule of displacement reaction which says that more reactive metal can replace the less reactive one.

Answer 2

Answer:

A displacement reaction happens when a more reactive metal (one that forms positive ions more easily) displaces a less reactive metal from a compound. Example: Magnesium is more reactive than copper, so magnesium can displace copper from a copper sulfate solution to create magnesium sulfate