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Which one of the following metal oxides shows both acidic and basic characters?

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{Na}_{2} O

K_{2} O

CuO

{Al}_{2} O_{3}

answer is D.

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Detailed Solution

Amphoteric oxide shows both acidic and basic characters

Ex: $A l_{2} O_{3}, Z n O$ .

Al₂O₃ can react with bases to form mixed salts and can also react with acids as well.

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