Question

which of the metal will displace the other three metal from its salt solution zinc ,copper, silver magnesium

Answer 1

Those at the top and bottom are most keen to react with other elements to form compounds. Less reactivemetals will displace other metals from their compounds. For example, magnesium will displace iron from iron oxide to form iron and magnesium carbonate. Copper will displace zinc from zinc sulphate.

Answer 2

Magnesium being more reactive than zinc,copper and silver will displace them from their salt solution.