Question

Aluminium does not react with water at room temperature because:

• A. it is above hydrogen in the activity series
• B. it is below hydrogen in the activity series
• C. it is covered with a thin film of $AlN$
• D. it is covered with thin film of $A{l}_2{O}_3$

Answer 1

Answer: (D)

it is covered with thin film of $A{l}_2{O}_3$

Aluminium is oxidized by water at temperatures below ${280}^{o}C$ to produce hydrogen, aluminium hydroxide and heat. The challenge in this reaction is circumventing the formed oxide layer which inhibits the reaction and the expenses associated with the storage of energy by regeneration of $Al$ metal.