Question

although aluminium is above hydrogen in the electrochemical series, it is stable in air and water. why?

Answer 1

Aluminum has great affinity towards oxygen so whenever it reacts with either air or water it forms a coating of aluminum oxide(Al2O3) and so further reaction cannot take place.
Hope this helps...

Answer 2

Answer:

Aluminum has great affinity towards oxygen so whenever it reacts with either air or water it forms a coating of aluminum oxide(Al2O3) and so further reaction cannot take place.

Explanation:

hope i am correct