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Question

A metal X reacts with oxygen to give amphoteric oxide. The metal X used here can be .

A
sodium
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B
carbon
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C
aluminium
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D
potassium
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Solution

The correct option is C aluminium
Aluminium on reaction with oxygen forms aluminium oxide (Al2O3). Al2O3 is an amphoteric oxide, i.e. it shows both acidic as well as basic behaviour.
Mainly metallic oxides are basic and non-metallic are acidic oxides.

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