Question

Aluminium is above iron in the reactivity series however its reaction with oxygen and water seems to indicate that it is less reactive than iron explain

Answer 1

Aluminium turns dull and does not rust.
4Al + 3O2 → 2Al2O3

Iron rusts, turns reddish brown when it comes in contact with moist air. Rust is brittle and falls of exposing a fresh layer of iron.

Fe + H2O + O2 → Fe2O3.xH20

Answer 2

Answer:

because of corosion as it becomes dule