Which of the following metals can displace iron from iron(II) sulfate solution?
Correct: B
For a metal to displace another metal from its salt solution, the displacing metal must be more reactive than the metal in the salt. According to the reactivity series (from most reactive to least reactive): Potassium > Sodium > Calcium > Magnesium > Aluminum > Zinc > Iron > Lead > Hydrogen > Copper > Silver > Gold.
Zinc (Zn) is more reactive than Iron (Fe). Therefore, zinc can displace iron from iron(II) sulfate solution:
Zn(s) + FeSO₄(aq) → ZnSO₄(aq) + Fe(s)
Copper, Silver, and Gold are all less reactive than iron and cannot displace it.