Which one of the following is the correct order of reactivity of Mg, Al, Zn and Fe with HCl? (a) Mg > Al > Zn > Fe (b) Mg > Al > Fe > Zn (c) Zn > Fe > Mg > Al (d) Fe > Al > Zn > Mg
The reactivity of metals with HCl follows the series: Mg > Al > Zn > Fe. Magnesium reacts vigorously, while aluminum also reacts but more slowly. Zinc shows moderate reactivity, and iron reacts the least vigorously among these metals.