* Activity Series: Metals are arranged in a series based on their reactivity. Metals higher in the series are more reactive than those lower down. Iron (Fe) is higher in the activity series than silver (Ag).

* Displacement Reactions: A more reactive metal can displace a less reactive metal from its compound in a single displacement reaction. For example:

* FeSO₄ + 2AgNO₃ → Fe(NO₃)₂ + 2Ag

In this reaction, iron (Fe) from ferrous sulfate displaces silver (Ag) from silver nitrate, forming iron nitrate and metallic silver. This reaction demonstrates the higher reactivity of iron.

Additional Factors:

* Solubility: Ferrous sulfate is generally more soluble in water than silver nitrate. This means it's more likely to be present in a form that can readily react.

* Oxidation State: The iron in ferrous sulfate is in the +2 oxidation state, which is a relatively stable state, but it can be oxidized further to +3. Silver in silver nitrate is already in its highest oxidation state (+1), making it less likely to react.

In summary: Ferrous sulfate is considered more reactive than silver nitrate due to its higher position in the activity series, its tendency to participate in displacement reactions, and its generally greater solubility.