Question

which metal develops a protective layer over its surface by reaction with air​

Answer 1

Answer:

Aluminium,zinc metals form a protective layer of their oxide which prevent them from reacting further

Answer 2

Answer:

Explanation:

Beryllium,the metal of group 2 A,develops a protective layer over its surface by reaction with air for protection.

In air,beryllium does not react.

Reaction:

Be + O2 ⇒Reaction does not occur

But at temperature of 800°C beryllium reacts and form oxides.

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