Find out only amphoteric oxides: co, b2o3, si02, co2, al2o3, pbo2, tl2o3
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co neutral , b2o3 acidic, sio2 acidic , co2 acidic, al2o3 amphoteric , pb2o3 amphoteric and tl2o3 is basic
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al2o3....pbo2 tl203..; is a amphoteric oxieds
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