Question

Aluminium is more reactive than iron because its standard reduction potential is higher, still aluminium is less easily corroded than iron because:

• A. it has higher reducing power and forms self-protective layer of $Al_{2}O_{3}$
• B. it has higher reducing power and does not react with oxygen so easily
• C. A1 reacts with atmospheric carbon dioxide to form a self-protective layer of $Al_{2}O_{3} + Al_{4}C_{3}$
• D. all of the above

Answer 1

Answer: (A)

$2Al+\frac{3}{2}O_{2} \to \underset {\text{Protective layer}}{{Al_{2}O_{3}}}$