Question

Give reasons (I) Copper loses it brown layer gradually when . Exposed to air. (ii)Aluminium oxide is called amphoteric oxide​

Answer 1

Answer: COPPER loses its brown color gradually when it is exploded into the air because it reacts with the available oxygen in the air to form oxide.

Aluminum oxide is an amphoteric oxide because it reacts with acids as well as bases and gives salts and water. Aluminum has electronegativity 1.5. ... Reaction with acid- When Aluminium oxide reacts with Hydrochloric acid it gives Aluminium chloride and water

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