(a)[1]
Give one further reason why aluminium is chosen for aircraft manufacture.
(b)[2]
Explain why aluminium does not corrode in water and oxygen.
(c)[2]
When aluminium metal reacts with hot dilute sulfuric acid, the only products are hydrogen and aqueous aluminium sulfate. Construct the symbol equation for this reaction. Include state symbols.
(d)[1]
Aluminium oxide reacts with sulfuric acid and with the alkali aqueous sodium hydroxide. State the name of the oxide category that reacts with both acids and alkalis.