Question

4. Aluminium is called a self-protecting metal because:

​

Answer 1

Answer:

When aluminium is exposed to the air, this overactive metal promptly reacts with the atmospheric oxygen to form aluminium oxide, which is a sticky natured compound of the same colour.

Thus, the aluminium protects itself from any corrosion by the formation of a layer of aluminium oxide over the entire metal surface and thus, aluminium is termed as a self-protecting metal.

Answer 2

Aluminium is called a self-protecting metal because it has having layer of a oxygen over it surface which not result in the formation of rust unlike with iron

I HOPE IT HELPS