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AP EAMCET202017 Sep 2020Evening ShiftChemistryClassification of Elements and Periodicity in PropertiesActual

How many compound given below are amphoteric oxides? ( P ₂ O ₅, P ₄ O ₆, As ₂ O ₅, As ₄ O ₆, Sb ₂ O ₅, Sb ₄ O ₆, Bi ₂ O ₃ )

Options

  1. A2
  2. B3
  3. C4
  4. D6

Correct answer

A. 2

Step-by-step solution

The oxides of the type ( +3 E₂ O ₃ ) of ( N ) and ( P , P ₂ O ₃ ) ( ( P ₄ O ₆ . ), dimer of ( . P ₂ O ₃ ) ) are purely acidic, that of ( As ) ( ( As ₄ O ₆ . ), dimer of ( . As ₂ O ₃ ) ) and ( Sb ( Sb ₄ O ₆ . ), dimer of ( . Sb ₂ O ₃ ) ) amphoteric and that of ( Bi ( Bi ₂ O ₃ ) ) is predominantly basic. The oxides of the type ( _ E₂ ⁺⁵ O ₅ ) are more acidic, e.g. ( N ₂ O ₅, P ₂ O ₅, As ₂ O ₅, Sb ₂ O ₅ ) So, in the given set of oxides of group- 15 elements, two oxides are amphoteric, ( As ₄ O ₆ ) and ( Sb ₄ O ₆ ).

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