According to the reactivity series of metals, a more reactive metal will replace a less reactive metal from its salt solution. For example, if iron nails are placed in a copper sulphate solution, the iron will react with the copper sulphate to form iron sulphate and copper metal. This is because iron is more reactive than copper.

Similarly, if a piece of zinc is placed in a silver nitrate solution, the zinc will react with the silver nitrate to form zinc nitrate and silver metal. This is because zinc is more reactive than silver.

Therefore, a less active metal will not replace a more reactive metal from its salt solution.