When a piece of aluminium is put into cold, dilute hydrochloric acid, no reaction is seen at first. What causes this?
- AAluminium contains small amounts of a more reactive metal that reacts with the acid instead.
- BAluminium is above hydrogen in the reactivity series.
- CAluminium is amphoteric and will only react with bases.
- DAluminium is coated with an oxide layer that prevents the acid getting to the metal.