Aluminium is more reactive than iron. But aluminium is less... | CHEMISTRY - USES OF BORON AND ALUMINIUM AND THEIR COMPOUNDS | SolveeIt | Solveeit

Today, August 20

Question

Aluminium is more reactive than iron. But aluminium is less easily corroded than iron because:

A

Aluminium is a noble metal

B

Oxygen forms a protective oxide layer on aluminium surface

C

Iron unergoes reaction easily with water

D

Iron forms both mono and divalent ions

Answer

Oxygen forms a protective oxide layer on aluminium surface

Explanation

Solution

2 Al + 3H2O $\longrightarrow$ Al2O3 + 3H2O (slow reaction)

Al2O3 forms protecting oxide layer on Al surface