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KCET2017Chemistryd and f Block Elements

Which one of the following metallic oxide exhibit amphoteric nature ?

Options

  1. A( CaO )
  2. B( Na ₂ O )
  3. C( BaO )
  4. D( Al ₂ O ₃ )

Correct answer

D. ( Al ₂ O ₃ )

Step-by-step solution

( Al ₂ O ₃ ) is amphoteric metallic oxide because it can react with both acids and bases [ array l Al ₂ O ₃+6 HCl 2 Al Cl ₃+3 H ₂ O Al ₂ O ₃+2 NaOH 2 NaAlO ₂+ H ₂ O array ]

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