Question

Arrange the following metals in increasing order of their reactivity towards water

$\mathrm{Zn},\mathrm{Fe},\mathrm{Al},\mathrm{Na}$

Answer 1

Reactivity series:

• The metals are arranged from high to low based on their reactivity.
• In the reactivity series, Zinc, Iron, Aluminum, and Sodium are more reactive than hydrogen. Hence hydrogen gets replaced by water by metals that are more reactive than it.
• Thus the increasing order of reactivity towards water is

$\mathrm{Iron}<\mathrm{Zinc}<\mathrm{Aluminum}<\mathrm{Sodium}$