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Which of the following oxides are amphot...

Which of the following oxides are amphoteric .
(1) BeO
(2) SnO
(3) ZnO
(4) `Al_2O_3`

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The correct Answer is:
(1) (2) (3) (4)
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PATHFINDER-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-QUESTION BANK
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