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An element 'A' reacts with oxygen to for...

An element 'A' reacts with oxygen to form a protective layer of compound 'B'. The com pound 'B' is also obtained by the reaction of 'A' with rust. The compound 'B' is amphoteric in nature. Identify the element 'A'.

A

silver

B

aluminium

C

copper

D

magnesium

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The correct Answer is:
B
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