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Amphoteric oxides are the oxides which reacts with acid as well as base to form salt and water.examples are ZnO , Al₂O₃ ,PbO etc.
Neutral oxides are the oxides having neutral pH like 
CO , NO ,H₂O.

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So iis there a way to find whether an oxide is amphoteric , acid or basic or u just have to remember it?
U r in which class?